Ford Explorer: Front Seats / Diagnosis and Testing

Diagnostic Trouble Code (DTC) Chart

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).

Diagnostic Trouble Code Chart

Module	Trouble Code	Description	Action
DDM	B1C03:23	Memory Switch No. 1: Low Signal	GO to Pinpoint Test I
DDM	B1C04:23	Memory Switch No. 2: Low Signal	GO to Pinpoint Test I
DDM	B1C05:23	Memory Switch No. 3: Low Signal	GO to Pinpoint Test I
DSM	B14C3:24	Rear Seat Height Switch Down: Signal Stuck High	GO to Pinpoint Test H
DSM	B14C4:24	Rear Seat Height Switch Up: Signal Stuck High	GO to Pinpoint Test H
DSM	B14CE:09	Horizontal Seat Motor Power: Component Failures	GO to Pinpoint Test H
DSM	B14CE:11	Horizontal Seat Motor Output: Short to Ground	GO to Pinpoint Test H
DSM	B14CE:12	Seat Horizontal Motor Output: Short to Battery	GO to Pinpoint Test H
DSM	B14CE:13	Seat Horizontal Motor Output: Open Circuit	GO to Pinpoint Test H
DSM	B14CF:11	Seat Tilt Motor Output: Short to Ground	GO to Pinpoint Test H
DSM	B14CF:12	Seat Tilt Motor Output: Short to Battery	GO to Pinpoint Test H
DSM	B14CF:13	Seat Tilt Motor Output: Open Circuit	GO to Pinpoint Test H
DSM	B14D0:11	Front/Tilt Seat Height Motor Output: Short to Ground	GO to Pinpoint Test H
DSM	B14D0:12	Front/Tilt Seat Height Motor Output: Short to Battery	GO to Pinpoint Test H
DSM	B14D0:13	Front/Tilt Seat Height Motor Output: Open Circuit	GO to Pinpoint Test H
DSM	B14D2:11	Rear Seat Height Motor Output: Short to Ground	GO to Pinpoint Test H
DSM	B14D2:12	Rear Seat Height Motor Output: Short to Battery	GO to Pinpoint Test H
DSM	B14D2:13	Rear Seat Height Motor Output: Open Circuit	GO to Pinpoint Test H
DSM	B1B96:24	Seat Slide Forward Switch: Signal Stuck High	GO to Pinpoint Test H
DSM	B1B97:24	Seat Slide Rearward Switch: Signal Stuck High	GO to Pinpoint Test H
DSM	B1B98:24	Seat Tilt Up Switch: High Signal Level	GO to Pinpoint Test H
DSM	B1B99:24	Seat Tilt Switch: High Signal Level	GO to Pinpoint Test H
DSM	B1C00:24	Seat Tilt Up Switch: Signal Stuck High	GO to Pinpoint Test H
DSM	B1C01:24	Seat Tilt Switch: High Signal Level	GO to Pinpoint Test H
DSM	U0100:00	Lost Communication With ECM/PCM "A": No Sub Type Information	GO to Pinpoint Test W
DSM	U0140:00	Lost Communication With Body Control Module: No Sub Type Information	GO to Pinpoint Test K
DSM	U0199:00	Lost Communication with Door A Control Module: No Sub Type Information	GO to Pinpoint Test AG
DSM	U0253:00	Lost Communication with Auxiliary Protocol Interface Module: No Sub Type Information	GO to Pinpoint Test AH
DSM	U2100:00	Initial Configuration Not Complete: No Sub Type Information	GO TO Pinpoint Test AJ
DSM	U3000:49	Control Module: Internal Electronic Failure	GO to Pinpoint Test AK
DSM	U3500:17	Control Module Input Power "A" Circuit Range/Performance: Voltage Above Threshold	GO TO Pinpoint Test AI
HVAC	B1034:11	Front Left Seat Heater Element: Short to Ground	GO TO Pinpoint Test O
HVAC	B1034:12	Front Left Seat Heater Element: Short to Battery	GO TO Pinpoint Test O
HVAC	B1034:13	Front Left Seat Heater Element: Open Circuit	GO TO Pinpoint Test O
HVAC	B1036:11	Front Right Seat Heater Element: Short to Ground	GO to Pinpoint Test P
HVAC	B1036:12	Front Right Seat Heater Element: Short to Battery	GO to Pinpoint Test P
HVAC	B1036:13	Front Right Seat Heater Element: Open Circuit	GO to Pinpoint Test P
HVAC	B1038:11	Front Left Seat Heater Sensor: Short to Ground	GO TO Pinpoint Test O
HVAC	B1038:15	Front Left Seat Heater Sensor: Short to Battery or Open Circuit	GO TO Pinpoint Test O
HVAC	B103A: 11	Front Right Seat Heater Sensor: Short to Ground	GO to Pinpoint Test P
HVAC	B103A: 15	Front Right Seat Heater Sensor: Short to Battery or Open Circuit	GO to Pinpoint Test P
SCME	B1151:4B	Passenger Seat Cushion: Overheated	GO to Pinpoint Test S
SCME	B1153:4B	Driver Seat Cushion: Overheated	GO TO Pinpoint Test R
SCME	B1208:11	Driver Seat Cushion Temperature Sensor: Short to Ground	GO TO Pinpoint Test R
SCME	B1208:15	Driver Seat Cushion Temperature Sensor: Short to Battery or Open Circuit	GO TO Pinpoint Test R
SCME	B1208:2A	Driver Seat Cushion Temperature Sensor: Stuck in Range	GO TO Pinpoint Test R
SCME	B120A: 11	Passenger Seat Cushion Temperature Sensor: Short to Ground	GO to Pinpoint Test S
SCME	B120A: 15	Passenger Seat Cushion Temperature Sensor: Short to Battery or Open Circuit	GO to Pinpoint Test S
SCME	B120A: 2A	Passenger Seat Cushion Temperature Sensor: Stuck in Range	GO to Pinpoint Test S
SCME	B14B9:11	Driver Seat Cushion Thermoelectric Device: Short to Ground	GO TO Pinpoint Test R
SCME	B14B9:12	Driver Seat Cushion Thermoelectric Device: Short to Battery	GO TO Pinpoint Test R
SCME	B14B9:13	Driver Seat Cushion Thermoelectric Device: Open Circuit	GO TO Pinpoint Test R
SCME	B14BB:11	Passenger Seat Cushion Thermoelectric Device: Short to Ground	GO to Pinpoint Test S
SCME	B14BB:12	Passenger Seat Cushion Thermoelectric Device: Short to Battery	GO to Pinpoint Test S
SCME	B14BB:13	Passenger Seat Cushion Thermoelectric Device: Open Circuit	GO to Pinpoint Test S
SCME	B14BD:11	Driver Seat Cushion Fan: Short to Ground	GO to Pinpoint Test U
SCME	B14BD:13	Driver Seat Cushion Fan: Open Circuit	GO to Pinpoint Test U
SCME	B14C0:11	Passenger Seat Cushion Fan: Short to Ground	GO to Pinpoint Test V
SCME	B14C0:13	Passenger Seat Cushion Fan: Open Circuit	GO to Pinpoint Test V
SCME	B1562:11	Driver Seat Back Fan Speed: Short to Ground	GO to Pinpoint Test U
SCME	B1562:12	Driver Seat Back Fan Speed: Short to Battery	GO to Pinpoint Test U
SCME	B1563:11	Passenger Seat Back Fan Speed: Short to Ground	GO to Pinpoint Test V
SCME	B1563:12	Passenger Seat Back Fan Speed: Short to Battery	GO to Pinpoint Test V
SCME	B1564:11	Driver Seat Cushion Fan Speed: Short to Ground	GO to Pinpoint Test U
SCME	B1564:12	Driver Seat Cushion Fan Speed: Short to Battery	GO to Pinpoint Test U
SCME	B1565:11	Passenger Seat Cushion Fan Speed: Short to Ground	GO to Pinpoint Test V
SCME	B1565:12	Passenger Seat Cushion Fan Speed: Short to Battery	GO to Pinpoint Test V
SCME	U0140:00	Lost Communication With Body Control Module: No Sub Type Information	GO TO Pinpoint Test X
SCME	U0257:00	Communication Lost with Front Controls/Display Interface Module: No Subtype Information	GO to Pinpoint Test Y
SCME	U1000:00	Solid State Driver Protection Active - Driver Disabled: No Subtype Information	GO to Pinpoint Test AL
SCME	U2100:00	Initial Configuration Not Complete: No Sub Type Information	GO to Pinpoint Test AM
SCME	U3000:49	Control Module: Internal Electronic Failure	GO to Pinpoint Test AK
SCMG	B146F:00	Rear Bladder Electro-Pneumatic Malfunction: No Subtype Information	GO to Pinpoint Test L
SCMG	B146F:04	Rear Bladder Electro-Pneumatic Failure: Internal System Failures	GO to Pinpoint Test L
SCMG	B1470:00	Bladder Cushion Electro-Pneumatic Malfunction: No Subtype Information	GO to Pinpoint Test L
SCMG	B1470:04	Bladder Cushion Electro-Pneumatic System: Internal System Malfunctions	GO to Pinpoint Test L
SCMG	B1471:11	Multi-Contour Seat Switch Input: Circuit Short to Ground	GO to Pinpoint Test L
SCMG	B1471:13	Multi-Contour Seat Switch Input: Open Circuit	GO to Pinpoint Test L
SCMG	B1471:2A	Multi-Contour Seat Switch Input: Stuck in Range	GO to Pinpoint Test L
SCMG	B1473:11	Pump Driver: Short to Ground	GO to Pinpoint Test L
SCMG	U0140:00	Lost Communication With Body Control Module: No Sub Type Information	GO to Pinpoint Test Z
SCMG	U0208:00	Communication Lost with Seat Control Module A: No Sub Type Information	GO TO Pinpoint Test AA
SCMG	U0253:00	Lost Communication with Auxiliary Protocol Interface Module: No Sub Type Information	GO to Pinpoint Test AC
SCMG	U0256:00	Communication Lost with Front Controls Interface Module "A": No Subtype Information	GO to Pinpoint Test advertisement
SCMG	U0422:00	Incorrect Data Received from Body Control Module: No Sub Type Information	GO TO Pinpoint Test AE
SCMG	U0455:00	Incorrect Data Received from Occupant Classification System Module: No Subtype Information	GO TO Pinpoint Test AF
SCMG	U1000:00	Solid State Driver Protection Active - Driver Disabled: No Subtype Information	GO to Pinpoint Test AN
SCMG	U2100:00	Initial Configuration Not Complete: No Sub Type Information	GO to Pinpoint Test AO
SCMG	U3000:49	Control Module: Internal Electronic Failure	GO to Pinpoint Test Access Point
SCMG	B146F:00	Rear Bladder Electro-Pneumatic Malfunction: No Subtype Information	GO to Pinpoint Test M
SCMG	B146F:04	Rear Bladder Electro-Pneumatic Failure: Internal System Failures	GO to Pinpoint Test M
SCMG	B1470:00	Bladder Cushion Electro-Pneumatic Malfunction: No Subtype Information	GO to Pinpoint Test M
SCMG	B1470:04	Bladder Cushion Electro-Pneumatic System: Internal System Malfunctions	GO to Pinpoint Test M
SCMG	B1471:11	Multi-Contour Seat Switch Input: Circuit Short to Ground	GO to Pinpoint Test M
SCMG	B1471:13	Multi-Contour Seat Switch Input: Open Circuit	GO to Pinpoint Test M
SCMG	B1471:2A	Multi-Contour Seat Switch Input: Stuck in Range	GO to Pinpoint Test M
SCMG	B1473:11	Pump Driver: Short to Ground	GO to Pinpoint Test M
SCMG	U0140:00	Lost Communication With Body Control Module: No Sub Type Information	GO to Pinpoint Test Z
SCMG	U0208:00	Communication Lost with Seat Control Module A: No Sub Type Information	GO TO Pinpoint Test AA
SCMG	U024B:00	Communication Lost with Seat Control Module "G": No Subtype Information	GO to Pinpoint Test AB
SCMG	U0253:00	Lost Communication with Auxiliary Protocol Interface Module: No Sub Type Information	GO to Pinpoint Test AC
SCMG	U0256:00	Communication Lost with Front Controls Interface Module "A": No Subtype Information	GO to Pinpoint Test advertisement
SCMG	U0422:00	Incorrect Data Received from Body Control Module: No Sub Type Information	GO TO Pinpoint Test AE
SCMG	U0455:00	Incorrect Data Received from Occupant Classification System Module: No Subtype Information	GO TO Pinpoint Test AF
SCMG	U1000:00	Solid State Driver Protection Active - Driver Disabled: No Subtype Information	GO to Pinpoint Test AN
SCMG	U2100:00	Initial Configuration Not Complete: No Sub Type Information	GO to Pinpoint Test AO
SCMG	U3000:49	Control Module: Internal Electronic Failure	GO to Pinpoint Test Access Point

Symptom Chart

Symptom Chart: Front Seats

Symptom Chart

Condition	Possible Sources	Action
No Communication with DDM	Refer to Pinpoint Test	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No Communication with DSM	Refer to Pinpoint Test	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No Communication with HVAC Module	Refer to Pinpoint Test	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No Communication with SCME	Refer to Pinpoint Test	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No Communication with SCMG	Refer to Pinpoint Test	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No Communication with SCMH	Refer to Pinpoint Test	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
Power Seat Inoperative or Malfunctioning — Driver, 6-Way	Refer to Pinpoint Test	GO to Pinpoint Test A
Power Seat Inoperative or Malfunctioning — Passenger, 4-Way	Refer to Pinpoint Test	GO to Pinpoint Test B
Power Seat Inoperative or Malfunctioning — Driver, 8-Way	Refer to Pinpoint Test	GO to Pinpoint Test C
Power Seat Inoperative or Malfunctioning — Driver, 10-Way, Without Memory	Refer to Pinpoint Test	GO to Pinpoint Test D
Power Seat Inoperative or Malfunctioning — Passenger, 8-Way	Refer to Pinpoint Test	GO to Pinpoint Test E
Power Lumbar Inoperative — Driver, Without Multi-Contour Seats	Refer to Pinpoint Test	GO to Pinpoint Test F
Power Lumbar Inoperative — Passenger, Without Multi-Contour Seats	Refer to Pinpoint Test	GO to Pinpoint Test G
Individual Multi-Contour Seat Function Not Working from Seat Control Switch — Touchscreen Control Operates Correctly	Seat Control Switch	GO TO Pinpoint Test AQ
Memory Seat Does Not Operate in Horizontal/Vertical/Tilt Direction Using the Seat Control Switch.	Refer to Pinpoint Test	GO to Pinpoint Test H
Memory Seat Does Not Operate Using the SET Memory Switch	Refer to Pinpoint Test	GO to Pinpoint Test I
Memory Seat Does Not Move to the Correct Memory Position	Refer to Pinpoint Test	GO TO Pinpoint Test AR
Memory Seat Does Not Operate When Using the RKE Transmitter	Refer to Pinpoint Test	GO TO Pinpoint Test AS
Easy Entry/Easy Exit Does Not Operate or Does Not Operate Correctly	Easy entry/exit function is not enabled Refer to Pinpoint Test	GO to Pinpoint Test J
Multi-Contour Seat Inoperative/Malfunctioning — Driver	Refer to Pinpoint Test	GO to Pinpoint Test L
Multi-Contour Seat Inoperative/Malfunctioning — Passenger	Refer to Pinpoint Test	GO to Pinpoint Test M
Both seat heaters inoperative — without seat heater/ventilation	Refer to Pinpoint Test	GO to Pinpoint Test N
Left seat heater inoperative — without seat heater/ventilation	Refer to Pinpoint Test	GO TO Pinpoint Test O
Right seat heater inoperative — without seat heater/ventilation	Refer to Pinpoint Test	GO to Pinpoint Test P
Both seat heaters inoperative — with seat heater/ventilation	Refer to Pinpoint Test	GO to Pinpoint Test Q
Left seat heater inoperative — with seat heater/ventilation	Refer to Pinpoint Test	GO TO Pinpoint Test R
Right seat heater inoperative — with seat heater/ventilation	Refer to Pinpoint Test	GO to Pinpoint Test S
Both seat heaters/ventilation inoperative	Refer to Pinpoint Test	GO TO Pinpoint Test T
Driver seat heater/ventilation inoperative/operating incorrectly	Refer to Pinpoint Test	GO to Pinpoint Test U
Passenger seat heater/ventilation inoperative/operating incorrectly	Refer to Pinpoint Test	GO to Pinpoint Test V

Pinpoint Test(s)

DIAGNOSTIC PINPOINT TEST A: POWER SEAT INOPERATIVE OR INCORRECT OPERATION – DRIVER, 6-WAY

For circuit and connector information, refer to Cell 120 in the Wiring Diagrams.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

Possible Sources

Fuse
Wiring, Terminals or Connectors
Seat Control Switch
Seat Track

Visual Inspection and Pre-checks

Make sure that fuse BJB 30 (30A) is in good condition.

WARNING: Incorrect repair methods or actions may cause unintentional deployment of the supplemental restraint system (SRS). Never compromise or deviate from these instructions. Failure to follow all instructions exactly may result in serious injury due to unintentional deployment.

A1 CHECK SEAT OPERATION

Attempt to operate the seat in all directions.

Seat does not operate in all directions?

Yes

GO to A2

No	If only the horizontal motor is inoperative, GO to A4. If only the front height motor is inoperative, GO to A6. If only the rear height motor is inoperative, GO to A8.

A2 CHECK THE VOLTAGE AT THE SEAT CONTROL SWITCH

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Seat Switch C360.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C360-9 Ground

Is the voltage greater than 11 volts?

Yes

GO to A3

No	CHECK the BJB fuse 30 (30A) for continuity. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams Manual to determine possible causes of the short. GO to A10

A3 CHECK THE SEAT SWITCH GROUND CIRCUIT

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C360-7 Ground

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to A10

No	REPAIR the circuit. GO to A10

A4 CHECK THE VOLTAGE AT THE HORIZONTAL SEAT MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Seat Horizontal Motor C362.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the horizontal switch forward and backward, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C362-1 C362-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to A10

GO to A5

A5 CHECK THE HORIZONTAL SEAT MOTOR CIRCUIT FOR AN OPEN

Disconnect: Driver Seat Switch C360.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C360-6 C362-3

C360-5 C362-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to A10

No	REPAIR the faulty circuit. GO to A10

A6 CHECK THE VOLTAGE AT THE FRONT SEAT LIFT MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Front Seat Height Motor C382.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the front height switch up and down, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C382-1 C382-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to A10

GO to A7

A7 CHECK THE FRONT SEAT HEIGHT POWER MOTOR CIRCUIT FOR AN OPEN

Disconnect: Driver Seat Switch C360.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C360-1 C382-3

C360-2 C382-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to A10

No	REPAIR the faulty circuit. GO to A10

A8 CHECK THE VOLTAGE AT THE REAR SEAT LIFT MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Seat Height Motor C363.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the rear height switch up and down, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C363-1 C363-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to A10

GO to A9

A9 CHECK THE REAR SEAT HEIGHT MOTOR CIRCUIT FOR AN OPEN

Disconnect: Driver Seat Switch C360.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C360-8 C363-3

C360-10 C363-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to A10

No	REPAIR the faulty circuit. GO to A10

A10 SRS (SUPPLEMENTAL RESTRAINT SYSTEM) CHECK SUCCESSFULLY VERIFIED

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Driver Side Air Bag C3333.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST B: POWER SEAT INOPERATIVE OR INCORRECT OPERATION – PASSENGER, 4-WAY

For circuit and connector information, refer to Cell 120 in the Wiring Diagrams.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

Possible Sources

Fuse
Wiring, Terminals or Connectors
Seat Control Switch
Seat Track

Visual Inspection and Pre-checks

Check that fuse BJB 31 (30A) is OK.

B1 CHECK THE SEAT OPERATION

Attempt to operate the seat in all directions.

Seat does not operate in all directions?

Yes

GO to B2

No	If only the horizontal motor is inoperative, GO to B4. If only the height motor is inoperative, GO to B6.

B2 CHECK THE VOLTAGE AT THE SEAT CONTROL SWITCH

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: Passenger Seat Control Switch C3395.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3395-8 Ground

Is the voltage greater than 11 volts?

Yes

GO to B3

No	CHECK the BJB fuse 31 (30A) for continuity. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams Manual to determine possible causes of the short. GO to B8

B3 CHECK THE SEAT SWITCH GROUND CIRCUIT

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3395-10 Ground

Is the resistance less than 3 ohms?

Yes

INSTALL a new passenger seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to B8

No	REPAIR the circuit. GO to B8

B4 CHECK THE VOLTAGE AT THE HORIZONTAL SEAT MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: Passenger Seat Horizontal Motor C332.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the horizontal switch forward and backward, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C332-1 C332-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to B8

GO to B5

B5 CHECK THE HORIZONTAL SEAT MOTOR CIRCUIT FOR AN OPEN

Disconnect: Passenger Seat Control Switch C3190.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3395-1 C332-3

C3395-2 C332-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new passenger seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to B8

No	REPAIR the faulty circuit. GO to B8

B6 CHECK THE VOLTAGE AT THE SEAT LIFT MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: Passenger Seat Height Adjustment Motor C330.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While activating the height switch up and down, measure:
Probe the connectors

Positive lead Measurement/Action Negative lead

C330-1 C330-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new passenger seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to B8

GO to B7

B7 CHECK THE SEAT HEIGHT MOTOR CIRCUIT FOR AN OPEN

Disconnect: Passenger Seat Control Switch C3395.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3395-5 C330-3

C3395-6 C330-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new passenger seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to B8

No	REPAIR the faulty circuit. GO to B8

B8 SRS (SUPPLEMENTAL RESTRAINT SYSTEM) CHECK SUCCESSFULLY VERIFIED

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Passenger Side Air Bag C3309.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST C: POWER SEAT INOPERATIVE OR INCORRECT OPERATION – DRIVER, 8-WAY

For circuit and connector information, refer to Cell 120 in the Wiring Diagrams.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

Possible Sources

Fuse
Wiring, Terminals or Connectors
Seat Control Switch
Seat Track

Visual Inspection and Pre-checks

Make sure that fuse BJB 30 (30A) is in good condition.

C1 CHECK THE SEAT OPERATION

Attempt to operate the seat in all directions.

Seat does not operate in all directions?

Yes

GO to C2

No	If only the horizontal motor is inoperative, GO to C4. If only the front height motor is inoperative, GO to C6. If only the rear height motor is inoperative, GO to C8. If only the seat motor is inoperative, GO to C10.

C2 CHECK THE VOLTAGE AT THE SEAT CONTROL SWITCH

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Seat Control Switch C3387.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-10 Ground

Is the voltage greater than 11 volts?

Yes

GO to C3

No	CHECK the BJB fuse 30 (30A) for continuity. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams Manual to determine possible causes of the short. GO to C12

C3 CHECK THE SEAT SWITCH GROUND CIRCUIT

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-11 Ground

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to C12

No	REPAIR the circuit. GO to C12

C4 CHECK THE VOLTAGE AT THE HORIZONTAL SEAT MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Seat Horizontal Motor C362.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the horizontal switch forward and backward, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C362-1 C362-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to C12

GO to C5

C5 CHECK THE SEAT FORE/AFT MOTOR CIRCUIT FOR AN OPEN

Disconnect: Driver Seat Control Switch C3387.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-14 C362-3

C3387-15 C362-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to C12

No	REPAIR the faulty circuit. GO to C12

C6 CHECK THE VOLTAGE AT THE FRONT SEAT LIFTER MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Front Seat Height Motor C382.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the front height switch up and down, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C382-1 C382-3

Voltage exceeds 11 volts when the seat control switch is moved in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to C12

GO TO C7

C7 CHECK THE FRONT SEAT HEIGHT MOTOR CIRCUIT FOR AN OPEN

Disconnect: Driver Seat Control Switch C3387.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-16 C382-3

C3387-17 C382-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to C12

No	REPAIR the faulty circuit. GO to C12

C8 CHECK THE VOLTAGE AT THE REAR SEAT LIFTER MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Seat Height Motor C363.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the rear height switch up and down, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C363-1 C363-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to C12

GO TO C9

C9 CHECK THE REAR SEAT HEIGHT MOTOR CIRCUIT FOR AN OPEN

Disconnect: Driver Seat Control Switch C3387.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-12 C363-3

C3387-13 C363-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to C12

No	REPAIR the faulty circuit. GO to C12

C10 CHECK THE VOLTAGE AT THE SEAT RECLINER MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Seat Recliner Motor C3187.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the horizontal switch forward and backward, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C3187-1 C3187-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to C12

GO TO C11

C11 CHECK THE SEAT FORE/AFT MOTOR CIRCUIT FOR AN OPEN

Disconnect: Driver Seat Control Switch C3387.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-7 C3187-3

C3387-9 C3187-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to C12

No	REPAIR the faulty circuit. GO to C12

C12 SRS (SUPPLEMENTAL RESTRAINT SYSTEM) CHECK PASSED

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Driver Side Air Bag C3333.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST D: POWER SEAT INOPERATIVE OR INCORRECT OPERATION – DRIVER, 10-WAY, NO MEMORY

For circuit and connector information, refer to Cell 120 in the Wiring Diagrams.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

Possible Sources

Fuse
Wiring, Terminals or Connectors
Seat Control Switch
Seat Track

Visual Inspection and Pre-checks

Make sure that fuse BJB 30 (30A) is in good condition.

D1 SEAT OPERATION CHECK

Attempt to operate the seat in all directions.

Seat does not operate in all directions?

Yes

GO to D2

No	If only the seat recliner motor is inoperative, GO to D4. If only the fore/aft motor is inoperative, GO to D6. If only the front height motor is inoperative, GO to D8. If only the rear height motor is inoperative, GO to D10.

D2 CHECK THE VOLTAGE AT THE SEAT CONTROL SWITCH

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Seat Control Switch C3387.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-10 Ground

Is the voltage greater than 11 volts?

Yes

GO to D3

No	CHECK fuse 30 (30A) in the BJB for integrity. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams Manual to determine the possible causes of the short circuit. GO to D12

D3 CHECK THE SEAT SWITCH GROUND CIRCUIT

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-11 Ground

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to D12

No	REPAIR the circuit. GO to D12

D4 CHECK THE VOLTAGE AT THE SEAT RECLINER MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Seat Recliner Motor C3187.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the recliner switch forward and backward, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C3187-1 C3187-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new driver front seat back frame. GO to D12

GO to D5

D5 CHECK THE SEAT RECLINER MOTOR CIRCUITS FOR AN OPEN

Disconnect: Driver Seat Control Switch C3387.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-9 C3187-1

C3387-7 C3187-3

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to D12

No	REPAIR the faulty circuit. GO to D12

D6 CHECK THE VOLTAGE AT THE SEAT FORE/AFT MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Seat Horizontal Motor C362.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the horizontal switch forward and backward, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C362-1 C362-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to D12

GO to D7

D7 CHECK THE SEAT FORE/AFT MOTOR CIRCUIT FOR AN OPEN

Disconnect: Driver Seat Control Switch C3387.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-14 C362-3

C3387-15 C362-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to D12

No	REPAIR the faulty circuit. GO to D12

D8 CHECK THE VOLTAGE AT THE FRONT SEAT HEIGHT MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Front Seat Height Motor C382.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the front height switch up and down, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C382-1 C382-3

Voltage exceeds 11 volts when the seat control switch is moved in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to D12

GO to D9

D9 CHECK THE FRONT SEAT HEIGHT MOTOR CIRCUIT FOR AN OPEN

Disconnect: Driver Seat Control Switch C3387.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-16 C382-3

C3387-17 C382-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to D12

No	REPAIR the faulty circuit. GO to D12

D10 CHECK THE VOLTAGE AT THE REAR SEAT LIFTER MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Seat Rear Height Motor C372.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the rear height switch up and down, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C372-1 C372-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to D12

GO to D11

D11 CHECK THE REAR SEAT HEIGHT MOTOR CIRCUIT FOR AN OPEN

Disconnect: Driver Seat Control Switch C3387.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-12 C372-3

C3387-13 C372-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to D12

No	REPAIR the faulty circuit. GO to D12

D12 SRS (SUPPLEMENTAL RESTRAINT SYSTEM) CHECK PASSED

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Driver Side Air Bag C3333.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST E: POWER SEAT INOPERATIVE OR INCORRECT OPERATION – PASSENGER, 8-WAY

For circuit and connector information, refer to Cell 120 in the Wiring Diagrams.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

Possible Sources

Fuse
Wiring, Terminals or Connectors
Seat Control Switch
Seat Track
Seat Back

Visual Inspection and Pre-checks

Check that fuse BJB 31 (30A) is OK.

E1 SEAT OPERATION CHECK

Attempt to operate the seat in all directions.

Seat does not operate in all directions?

Yes

GO to E2

No	If only the seat recliner motor is inoperative, GO to E4. If only the fore/aft motor is inoperative, GO to E6. If only the rear height motor is inoperative, GO to E8.

E2 CHECK THE VOLTAGE AT THE SEAT CONTROL SWITCH

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: Passenger Seat Control Switch C3388.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3388-11 Ground

Is the voltage greater than 11 volts?

Yes

GO to E3

No	CHECK fuse 31 (30A) in the BJB for integrity. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams Manual to determine the possible causes of the short circuit. GO to E10

E3 CHECK THE SEAT SWITCH GROUND CIRCUIT

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3388-10 Ground

Is the resistance less than 3 ohms?

Yes

INSTALL a new passenger seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to E10

No	REPAIR the circuit. GO to E10

E4 CHECK THE VOLTAGE AT THE SEAT RECLINER MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: Passenger Seat Recline Motor C3189.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the recliner switch forward and backward, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C3189-1 C3189-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new passenger front seat back frame. GO to E10

GO to E5

E5 CHECK THE SEAT RECLINER MOTOR CIRCUITS FOR AN OPEN

Disconnect: Passenger Seat Control Switch C3388.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3388-1 C3189-3

C3388-3 C3189-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new passenger seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to E10

No	REPAIR the faulty circuit. GO to E10

E6 CHECK THE VOLTAGE AT THE SEAT FORE/AFT MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: Passenger Seat Horizontal Motor C332.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the horizontal switch forward and backward, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C332-1 C332-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new passenger seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to E10

GO to E7

E7 CHECK THE SEAT FORE/AFT MOTOR CIRCUIT FOR AN OPEN

Disconnect: Passenger Seat Control Switch C330.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3388-17 C332-3

C3388-16 C332-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new passenger seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to E10

No	REPAIR the faulty circuit. GO to E10

E8 CHECK THE VOLTAGE AT THE SEAT LIFTER MOTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: Passenger Seat Height Adjustment Motor C330.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the rear height switch up and down, measure:
Click to display connectors

Positive lead Measurement/Action Negative lead

C330-1 C330-3

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new passenger seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to E10

GO to E9

E9 CHECK THE SEAT HEIGHT MOTOR CIRCUIT FOR AN OPEN

Disconnect: Passenger Seat Control Switch C330.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3388-18 C330-3

C3388-19 C330-1

Is the resistance less than 3 ohms?

Yes

INSTALL a new passenger seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to E10

No	REPAIR the faulty circuit. GO to E10

E10 SRS (SUPPLEMENTAL RESTRAINT SYSTEM) CHECK PASSED

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Passenger Side Air Bag C3309.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST F: POWER LUMBAR INOPERATIVE – DRIVER, NON-MULTI-CONTOUR SEATS

For circuit and connector information, refer to Cell 120 in the Wiring Diagrams.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

Possible Sources

Wiring, Terminals or Connectors
Seat Control Switch
Front Seat Power Lumbar

F1 SEAT LUMBAR MOTOR VOLTAGE CHECK

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Seat Lumbar Support Motor C3215.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While activating the lumbar switch in both directions, measure:
Probe the connectors

Positive lead Measurement/Action Negative lead

C3215-A C3215-B

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new driver seat power lumbar assembly.
REFER TO: Front Power Lumbar Seat Assembly - Vehicles Without: Multi-Contour Seats (501-10A Front Seats, Removal and Installation).
GO to F3

GO to F2

F2 CHECK THE SEAT LUMBAR MOTOR CIRCUITS FOR AN OPEN

Disconnect: Driver Seat Control Switch C3387.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-2 C3215-B

C3387-6 C3215-A

Is the resistance less than 3 ohms?

Yes

INSTALL a new driver seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to F3

No	REPAIR the faulty circuit. GO to F3

F3 SRS (SUPPLEMENTAL RESTRAINT SYSTEM) CHECK PASSED

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Driver Side Air Bag C3333.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST G: POWER LUMBAR INOPERATIVE – PASSENGER, NON-MULTI-CONTOUR SEATS

For circuit and connector information, refer to Cell 120 in the Wiring Diagrams.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

Possible Sources

Wiring, Terminals or Connectors
Seat Control Switch
Front Seat Power Lumbar

G1 CHECK THE VOLTAGE AT THE SEAT LUMBAR MOTOR.

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: Passenger Seat Lumbar Support Motor C3216.

NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While activating the lumbar switch in both directions, measure:
Probe the connectors

Positive lead Measurement/Action Negative lead

C3216-A C3216-B

Voltage exceeds 11 V when the seat control switch is moved in both directions?

Yes

INSTALL a new passenger seat power lumbar assembly.
REFER TO: Front Power Lumbar Seat Assembly - Vehicles Without: Multi-Contour Seats (501-10A Front Seats, Removal and Installation).
GO to G3

GO to G2

G2 CHECK THE SEAT LUMBAR MOTOR CIRCUITS FOR AN OPEN

Disconnect: Passenger Seat Control Switch C3388.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3388-20 C3216-B

C3388-2 C3216-A

Is the resistance less than 3 ohms?

Yes

INSTALL a new passenger seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to G3

No	REPAIR the faulty circuit. GO to G3

G3 SRS (SUPPLEMENTAL RESTRAINT SYSTEM) CHECK PASSED

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Passenger Side Air Bag C3309.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST H: MEMORY SEAT INOPERATIVE IN HORIZONTAL/VERTICAL/TILT CONTROL USING THE SEAT CONTROL SWITCH

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
DSM B14C3:24	Rear Seat Height Down Switch: Stuck High Signal	If the seat control switch is active for more than 2 minutes or is active during the self-test, the DSM sets this DTC.
DSM B14C4:24	Rear Seat Height Up Switch: Stuck High Signal	If the seat control switch is active for more than 2 minutes or is active during the self-test, the DSM sets this DTC.
DSM B14CE:09	Horizontal Seat Motor Power: Component Failures	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DSM B14CE:11	Horizontal Seat Motor Output: Short to Ground	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DSM B14CE:12	Horizontal Seat Motor Output: Short to Battery	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DTC B14CE:13	Seat Fore/Aft Motor Output: Circuit Open	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DSM B14CF:11	Recline Seat Motor Output: Short to Ground	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DSM B14CF:12	Recline Seat Motor Output: Short to Battery	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DTC B14CF:13	Seat Tilt Motor Output: Open Circuit	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DSM B14D0:11	Seat Height/Recline Motor Output Signal: Short to Ground	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DSM B14D0:12	Seat Height/Recline Motor Output Signal: Short to Battery	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DTC B14D0:13	Seat Front Height/Tilt Motor Output Signal: Circuit Open	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DSM B14D2:11	Rear Seat Height Motor Output: Short to Ground	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DSM B14D2:12	Rear Seat Height Motor Output: Short to Battery	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DTC B14D2:13	Rear Seat Height Motor Output: Open Circuit	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DTC B1B96:24	Seat Slide Forward Switch: High Signal	If the current detected by the DSM is within the specified range, a fault code is set and the output is disabled.
DTC B1B97:24	Seat Slide Rearward Switch: Stuck High Signal	If the seat control switch is active for more than 2 minutes or is active during the self-test, the DSM sets this DTC.
DTC B1B98:24	Seat Recline Up Switch: Stuck High Signal	If the seat control switch is active for more than 2 minutes or is active during the self-test, the DSM sets this DTC.
DTC B1B99:24	Seat Tilt Down Switch: Signal Constantly High	If the seat control switch is active for more than 2 minutes or is active during the self-test, the DSM sets this DTC.
DTC B1C00:24	Seat Recline Up Switch: Stuck High Signal	If the seat control switch is active for more than 2 minutes or is active during the self-test, the DSM sets this DTC.
DTC B1C01:24	Seat Tilt Down Switch: Signal Constantly High	If the seat control switch is active for more than 2 minutes or is active during the self-test, the DSM sets this DTC.

Possible Sources

Fuse
Wiring, Terminals or Connectors
Seat Control Switch
Fore/Aft Motor
Seat Track
Seat Back
DSM

Visual Inspection and Pre-checks

Make sure that fuse BJB 30 (30A) is in good condition.

H1 OBTAIN THE DSM (DRIVER FRONT SEAT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

The ignition is on.

Attempt to activate the seat control switch in all directions.

Using the diagnostic scan tool, perform a DSM self-test. If the diagnostic scan tool does not communicate with the DSM,
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

Are any DSM diagnostic trouble codes (DTCs) present?

Yes

For DTC B14C3:24, B14C4:24, B1B96:24, B1B97:24, B1B98:24, B1B99:24, B1C00:24 or B1C01:24, GO to H3.
For DTC B14CE:XX, B14CF:XX, B14D0:XX or B14D2:XX, GO to H9.
For information on all other diagnostic trouble codes (DTCs), REFER to the DSM DTC Chart.

GO to H2

H2 CHECK THE DSM (DRIVER FRONT SEAT MODULE) SEAT CONTROL SWITCH PARAMETER IDENTIFICATION (PIDS)

Operate the seat control switch in all positions and monitor the following DSM seat control switch parameter identifications (PIDs) with the diagnostic scan tool:
- Access the DSM and monitor the SEAT_TILT_DWN PID
- Access the DSM and monitor the SEAT_TILT_UP PID
- Access the DSM and monitor the SEAT_RECL_DWN PID
- Access the DSM and monitor the SEAT_RECL_UP PID
- Access the DSM and monitor the SEAT_HGT_DWN PID
- Access the DSM and monitor the SEAT_HGT_UP PID
- Access the DSM and monitor the SEAT_BCK_SW PID
- Access the DSM and monitor the SEAT_FW_SW PID

Do the PID states match the switch positions?

Yes

GO to H9

GO to H3

H3 CHECK THE SEAT CONTROL SWITCH

Ignition OFF.

Disconnect: Driver Seat Control Switch C3387.

Perform the seat control switch component test.
REFER TO Wiring Diagrams, Cell 149, for schematic and connector information.

Did the seat control switch pass the component test?

Yes

GO to H4

No	INSTALL a new seat control switch. REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).

H4 CHECK THE VOLTAGE AT THE SEAT CONTROL SWITCH

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-10 Ground

Is the voltage greater than 11 volts?

Yes

GO to H5

No	REPAIR the circuit. GO to H37

H5 CHECK THE SEAT SWITCH GROUND CIRCUIT FOR AN OPEN

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3387-11 Ground

Is the resistance less than 3 ohms?

Yes

GO to H6

No	REPAIR the circuit. GO to H37

H6 CHECK THE CIRCUITS BETWEEN THE SEAT CONTROL SWITCH AND THE DSM (DRIVER FRONT SEAT MODULE) FOR A SHORT TO VOLTAGE

Disconnect: DSM C341A.

The ignition is on.

Action:
Click to display the connectors

Positive lead	Measurement/Action	Negative lead
C3387-17		Ground
C3387-16		Ground
C3387-13		Ground
C3387-12		Ground
C3387-14		Ground
C3387-15		Ground
C3387-9		Ground
C3387-7		Ground

Is there voltage present?

Yes

REPAIR the faulty circuit. GO to H37

GO to H7

H7 CHECK THE CIRCUITS BETWEEN THE SEAT CONTROL SWITCH AND THE DSM (DRIVER FRONT SEAT MODULE) FOR A SHORT TO GROUND

Action:
Click to display the connectors

Positive lead	Measurement/Action	Negative lead
C3387-17		Ground
C3387-16		Ground
C3387-13		Ground
C3387-12		Ground
C3387-14		Ground
C3387-15		Ground
C3387-9		Ground
C3387-7		Ground

Is the resistance greater than 10000 ohms?

Yes

GO to H8

No	REPAIR the faulty circuit. GO to H37

H8 CHECK THE CIRCUITS BETWEEN THE SEAT CONTROL SWITCH AND THE DSM (DRIVER FRONT SEAT MODULE) FOR AN OPEN

Action:
Click to display the connectors

Positive lead	Measurement/Action	Negative lead
C3387-17		C341A-13
C3387-16		C341A-14
C3387-13		C341A-1
C3387-12		C341A-2
C3387-14		C341A-3
C3387-15		C341A-4
C3387-9		C341A-12
C3387-7		C341A-11

Is the resistance greater than 10000 ohms?

Yes

GO to H36

No	REPAIR the faulty circuit. GO to H37

H9 CHECK THE SEAT OPERATION

Using the seat control switch, attempt to operate the seat in the following directions:
- Front Height Up and Down
- Rear Height Up and Down
- Horizontal forward and rearward
- Recline forward and rearward

Does the driver seat operate correctly?

Yes

The condition is intermittent. CHECK for the cause of the intermittent concern, especially the contacts and terminals of electrical connectors that were disconnected. Do not install any new components at this time. Components must only be installed when directed to do so in a pinpoint test. REPAIR any wiring, terminal or connector faults found.

No	If the seat does not move, GO to H10. If front vertical seat movement does not occur, GO to H12. If rear vertical seat movement does not occur, GO to H18. If horizontal seat movement does not occur, GO to H24. If seat recline does not occur, GO to H30.

H10 CHECK THE VOLTAGE AT THE DSM (DRIVER FRONT SEAT MODULE)

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: DSM C341C.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341C-2 Ground

Is the voltage greater than 11 volts?

Yes

GO to H11

No	REPAIR the circuit. GO to H37

H11 CHECK THE DSM (DRIVER FRONT SEAT MODULE) GROUND CIRCUITS FOR AN OPEN

Disconnect: DSM C341C.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341C-4 Ground

C341C-5 Ground

C341C-6 Ground

Is the resistance less than 3 ohms?

Yes

GO to H36

No	REPAIR the faulty circuit. GO to H37

H12 CHECK THE FRONT VERTICAL MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: DSM C341B.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-8 Ground

C341B-16 Ground

Is there voltage present?

Yes

GO to H13

GO to H14

H13 CHECK THE FRONT VERTICAL MOTOR CIRCUITS FOR A SHORT TO VOLTAGE WITH THE ENGINE OFF

Ignition OFF.

Disconnect: Driver Front Seat Height Motor C383.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-8 Ground

C341B-16 Ground

Is there voltage present?

Yes

REPAIR the faulty circuit. GO to H37

No	INSTALL a new driver seat track. REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation). GO to H37

H14 CHECK THE FRONT VERTICAL MOTOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-8 Ground

C341B-16 Ground

Is the resistance greater than 10000 ohms?

Yes

GO to H16

GO to H15

H15 CHECK THE FRONT VERTICAL MOTOR CIRCUITS FOR A SHORT TO GROUND WITH THE ENGINE OFF

Disconnect: Driver Front Seat Height Motor C383.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-8 Ground

C341B-16 Ground

Is the resistance greater than 10000 ohms?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to H37

No	REPAIR the faulty circuit. GO to H37

H16 CHECK THE FRONT VERTICAL MOTOR CIRCUITS FOR AN OPEN

Disconnect: Driver Front Seat Height Motor C383.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-8 C383-1

C341B-16 C383-3

Is the resistance less than 3 ohms?

Yes

GO to H17

No	REPAIR the faulty circuit. GO to H37

H17 CHECK THE VOLTAGE AT THE FRONT VERTICAL MOTOR

NOTICE: The following step uses a test lamp to simulate normal circuit loads. Use only the Rotunda test lamp (SGT27000) or a 300 mA incandescent lamp. To prevent damage to connector terminals, use the Rotunda Flex Probe Kit to connect the test lamp probe to the vehicle. Do not use the test lamp probe directly on any connector.

Connect: DSM C341B.

The ignition is on.

Connect a 12-volt incandescent test lamp between:
Click to display connectors

Positive lead Measurement/Action Negative lead

C383-1 C383-3

NOTE: With the seat motor electrical connector disconnected, the DSM may activate the seat motor output for approximately 500 ms and then turn off. Activate the seat control switch position (front height up and down) while observing the indicator lamp.

Does the test lamp illuminate momentarily when the seat control switch is activated in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to H37

GO to H36

H18 CHECK THE REAR HEIGHT MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: DSM C341B.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-2 Ground

C341B-5 Ground

Is there voltage present?

Yes

GO to H19

GO to H20

H19 CHECK THE REAR HEIGHT MOTOR CIRCUITS FOR A SHORT TO VOLTAGE WITH THE ENGINE OFF

Ignition OFF.

Disconnect: Driver Seat Height Motor C363.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-2 Ground

C341B-5 Ground

Is there voltage present?

Yes

REPAIR the faulty circuit. GO to H37

No	INSTALL a new driver seat track. REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation). GO to H37

H20 CHECK THE REAR HEIGHT MOTOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-2 Ground

C341B-5 Ground

Is the resistance greater than 10000 ohms?

Yes

GO to H22

GO to H21

H21 CHECK THE REAR HEIGHT MOTOR CIRCUITS FOR A SHORT TO GROUND WITH THE ENGINE OFF

Disconnect: Driver Seat Height Motor C363.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-2 Ground

C341B-5 Ground

Is the resistance greater than 10000 ohms?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to H37

No	REPAIR the faulty circuit. GO to H37

H22 CHECK THE REAR HEIGHT MOTOR CIRCUITS FOR AN OPEN

Disconnect: Driver Seat Height Motor C363.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-2 C363-1

C341B-5 C363-3

Is the resistance less than 3 ohms?

Yes

GO to H23

No	REPAIR the faulty circuit. GO to H37

H23 CHECK THE VOLTAGE AT THE REAR HEIGHT MOTOR

Connect: DSM C341B.

The ignition is on.

Connect a 12-volt incandescent test lamp between:
Click to display connectors

Positive lead Measurement/Action Negative lead

C363-1 C363-3

NOTE: With the seat motor electrical connector disconnected, the DSM may activate the seat motor output for approximately 500 ms and then turn off. Activate the seat control switch positions (rear height up and down) while observing the indicator lamp.

Does the test lamp illuminate momentarily when the seat control switch is activated in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to H37

GO to H36

H24 CHECK THE HORIZONTAL MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: DSM C341B.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-14 Ground

C341B-15 Ground

Is there voltage present?

Yes

GO to H25

GO to H26

H25 CHECK THE HORIZONTAL MOTOR CIRCUITS FOR A SHORT TO VOLTAGE WITH THE ENGINE OFF

Ignition OFF.

Disconnect: Driver Seat Horizontal Motor C362.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-14 Ground

C341B-15 Ground

Is there voltage present?

Yes

REPAIR the faulty circuit. GO to H37

No	INSTALL a new driver seat track. REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation). GO to H37

H26 CHECK THE HORIZONTAL MOTOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-14 Ground

C341B-15 Ground

Is the resistance greater than 10000 ohms?

Yes

GO to H28

GO to H27

H27 CHECK THE HORIZONTAL MOTOR CIRCUITS FOR A SHORT TO GROUND WITH THE ENGINE OFF

Disconnect: Driver Seat Horizontal Motor C362.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-14 Ground

C341B-15 Ground

Is the resistance greater than 10000 ohms?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to H37

No	REPAIR the faulty circuit. GO to H37

H28 CHECK THE HORIZONTAL MOTOR CIRCUITS FOR AN OPEN

Disconnect: Driver Seat Horizontal Motor C362.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-14 C362-1

C341B-15 C362-3

Is the resistance less than 3 ohms?

Yes

GO to H29

No	REPAIR the faulty circuit. GO to H37

H29 CHECK THE VOLTAGE AT THE HORIZONTAL MOTOR

Connect: DSM C341B.

The ignition is on.

Connect a 12-volt incandescent test lamp between:
Click to display connectors

Positive lead Measurement/Action Negative lead

C362-1 C362-3

NOTE: With the seat motor electrical connector disconnected, the DSM may activate the seat motor output for approximately 500 ms and then turn off. Activate the seat control switch position (horizontal forward and rearward) while observing the indicator lamp.

Does the test lamp illuminate momentarily when the seat control switch is activated in both directions?

Yes

INSTALL a new driver seat track.
REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation).
GO to H37

GO to H36

H30 CHECK THE RECLINER MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: DSM C341B.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-7 Ground

C341B-4 Ground

Is there voltage present?

Yes

GO to H31

GO to H32

H31 CHECK THE FRONT VERTICAL MOTOR CIRCUITS FOR A SHORT TO VOLTAGE WITH THE SEAT MOTOR DISCONNECTED

Ignition OFF.

Disconnect: Driver Seat Front Tilt Motor C3187.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-7 Ground

C341B-4 Ground

Is there voltage present?

Yes

REPAIR the faulty circuit. GO to H37

No	INSTALL a new driver seat back frame. GO to H37

H32 CHECK THE FRONT VERTICAL MOTOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-7 Ground

C341B-4 Ground

Is the resistance greater than 10000 ohms?

Yes

GO to H34

GO to H33

H33 CHECK THE RECLINER MOTOR CIRCUITS FOR A SHORT TO GROUND WITH THE ENGINE OFF

Disconnect: Driver Seat Recliner Motor C3187.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-7 Ground

C341B-4 Ground

Is the resistance greater than 10000 ohms?

Yes

INSTALL a new driver seat back frame. GO to H37

No	REPAIR the faulty circuit. GO to H37

H34 CHECK THE RECLINER MOTOR CIRCUITS FOR AN OPEN

Disconnect: Driver Seat Recliner Motor C3187.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341B-7 C3187-1

C341B-4 C3187-3

Is the resistance less than 3 ohms?

Yes

GO to H35

No	REPAIR the faulty circuit. GO to H37

H35 CHECK THE VOLTAGE AT THE RECLINER MOTOR

Connect: DSM C341B.

The ignition is on.

Connect a 12-volt incandescent test lamp between:
Click to display connectors

Positive lead Measurement/Action Negative lead

C3187-1 C3187-3

NOTE: With the seat motor electrical connector disconnected, the DSM may activate the seat motor output for approximately 500 ms and then turn off. Activate the seat control switch position (recline forward and rearward) while observing the indicator lamp.

Does the test lamp illuminate momentarily when the seat control switch is activated in both directions?

Yes

INSTALL a new driver seat back frame. GO to H37

GO to H36

H36 CHECK THE DSM (DRIVER FRONT SEAT MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all DSM connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the DSM connectors. Make sure they are fully seated and locked.

NOTE: Do not connect the driver side airbag module C3333 at this time. Connect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles exist for this concern, INSTALL a new DSM.
REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).
GO to H37

No	The system is currently operating correctly. The concern may have been caused by module connections. CHECK for root cause of any connector or terminal concerns. GO to H37

H37 SRS (SUPPLEMENTAL RESTRAINT SYSTEM) CHECK SUCCESSFULLY COMPLETED

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Driver Side Air Bag C3333.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST I: MEMORY SEAT INOPERATIVE USING THE MEMORY SET SWITCH

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
DDM B1C03:23	Memory Switch No. 1: Low Signal	If a short to ground is detected in the switch input circuit during the DDM self-test, a DTC is set. If activity is detected on the input circuit for more than 2 minutes, the DTC is set as continuous. While a DTC is set, any input signal on the circuit is ignored.
DDM B1C04:23	Memory Switch No. 2: Low Signal	If a short to ground is detected in the switch input circuit during the DDM self-test, a DTC is set. If activity is detected on the input circuit for more than 2 minutes, the DTC is set as continuous. While a DTC is set, any input signal on the circuit is ignored.
DDM B1C05:23	Memory Switch No. 3: Low Signal	If a short to ground is detected in the switch input circuit during the DDM self-test, a DTC is set. If activity is detected on the input circuit for more than 2 minutes, the DTC is set as continuous. While a DTC is set, any input signal on the circuit is ignored.

Possible Sources

Memory seat hard/soft stops installed incorrectly
Wiring, Terminals or Connectors
SET memory switch
Ignition status information is missing
DDM

I1 CHECK DSM (DRIVER SEAT MODULE) IGNITION STATE PID (PARAMETER IDENTIFICATION)

The ignition is on.

Access the BCM and monitor the IGN_SW_STATE PID

Monitor the PID while cycling the ignition from ON to OFF and back to ON.

Do the PID states agree?

Yes

GO to I2.

No	To diagnose no power during operation, REFER TO: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical Components, Diagnosis and Testing).

I2 CHECK DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, perform a self-test of the DSM and DDM. If the diagnostic scan tool does not communicate with the DSM and/or DDM,
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

Are any diagnostic trouble codes (DTCs) present?

Yes

For DTC B1C03:23, B1C04:23 or B1C05:23, GO to I4.
For information on all other diagnostic trouble codes (DTCs), REFER TO the DSM or DDM DTC chart(s) in this section.

GO to I3

I3 MONITOR DDM (DRIVER DOOR MODULE) PARAMETER IDENTIFICATION (PIDS) AND CHECK MEMORY SETTING SWITCH INPUTS

While activating memory recall buttons 1, 2 and 3, monitor the following DDM memory recall switch parameter identifications (PIDs) with the diagnostic scan tool:
- Access the DDM and monitor the MEMORY_SW_1 PID
- Access the DDM and monitor the MEMORY_SW_2 PID
- Access the DDM and monitor the MEMORY_SW_3 PID

Do the PID values match the switch button positions?

Yes

Using the seat control switch, OPERATE the memory seat through the full travel of each seat axis to reset the hard/soft stops. Run the system and determine if the concern persists. If the seat malfunctions in any direction, GO to the pinpoint test H

GO to I4

I4 CHECK MEMORY SETTING SWITCH

Ignition OFF.

Disconnect: Driver Door Lock Switch C541.

Press and release the specified memory recall button 1, and measure the component side resistance of the driver door lock control switch using the following table:

Positive lead Measurement/Action Negative lead

C541, Pin 5, component side C541, Pin 6, component side

Press and release the specified memory recall button 2, and measure the component side resistance of the driver door lock control switch using the following table:

Positive lead Measurement/Action Negative lead

C541, Pin 4, component side C541, Pin 6, component side

Press and release the specified memory recall button 3, and measure the component side resistance of the driver door lock control switch using the following table:

Positive lead Measurement/Action Negative lead

C541, Pin 3, component side C541, Pin 6, component side

Is the resistance less than 20 ohms with the switch buttons pressed and greater than 10,000 ohms with the switch buttons released?

Yes

GO to I5

No	INSTALL a new driver door lock control switch. REFER TO: Front Door Lock Control Switch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).

I5 CHECK MEMORY SWITCH GROUND CIRCUIT FOR OPEN

Ignition OFF.

Disconnect: DDM C501A.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C541-6 C501A-10

Is the resistance less than 3 ohms?

Yes

GO to I6

No	REPAIR the circuit.

I6 CHECK MEMORY CIRCUITS FOR SHORT TO VOLTAGE

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C541-3 Ground

C541-4 Ground

C541-5 Ground

Is there voltage present?

Yes

REPAIR the faulty circuit.

GO to I7

I7 CHECK MEMORY MODULE SWITCH CIRCUITS FOR SHORT TO GROUND

Ignition OFF.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C541-3 Ground

C541-4 Ground

C541-5 Ground

Is the resistance greater than 10000 Ohms?

Yes

GO to I8

No	REPAIR the faulty circuit.

I8 CHECK MEMORY SWITCH CIRCUITS FOR OPEN

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C541-3 C501A-17

C541-4 C501A-16

C541-5 C501A-15

Is the resistance less than 3 ohms?

Yes

GO to I9

No	REPAIR the faulty circuit.

I9 CHECK DDM (DRIVER DOOR MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all DDM connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the DDM connectors. Make sure they are fully seated and properly latched.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles exist for this concern, INSTALL a new DDM.
REFER TO: Driver Door Module (DDM) (419-10 Multifunction Electronic Modules, Removal and Installation).

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

DIAGNOSTIC PINPOINT TEST J: EASY ENTRY/EASY EXIT INOPERATIVE/INCORRECT OPERATION

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

Possible Sources

Easy entry/exit function is not enabled
Ignition status information is missing
DSM

Visual Inspection and Pre-checks

Make sure the Easy Entry/Exit feature is enabled in the Message Center. REFER TO the Owner's Literature for information on programming vehicle settings in the Message Center.

J1 CHECK DRIVER POWER SEAT OPERATION

The ignition is on.

Check the Message Center to make sure the Easy Entry/Exit feature is enabled.

Using the seat control switch, check that the power driver seat moves fully forward and rearward.

Using the scan tool, perform the DSM self-test.

Are any Diagnostic Trouble Codes (DTCs) retrieved?

Yes

REFER TO the DSM DTC chart.

No	If disabled, ENABLE the easy entry/exit feature through the message center. REFER TO the Owner's Literature. CHECK the system for normal operation. If correct, INSTRUCT the customer on proper system operation. GO to J2

J2 CHECK DSM (DRIVER SEAT MODULE) IGNITION STATE PID (PARAMETER IDENTIFICATION)

The ignition is on.

Access the BCM and monitor the IGN_SW_STATE PID

Monitor the PID while cycling the ignition from ON to OFF and back to ON.

Do the PID states match the ignition mode?

Yes

INSTALL a new DSM.
REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).

No	CHECK the ignition state. REFER TO: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical Components, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST K: DTC: U0140:00

For circuit and connector information, refer to Wiring Diagrams Cell 14.

Normal Operation and Fault Symptoms

The DSM and BCM communicate using MS-CAN.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
DSM U0140:00	Lost Communication With Body Control Module: No Sub Type Information	The DSM sets whenever it loses communication with the BCM for 5 seconds or longer, while the DSM input voltage is between 10 and 15.5 volts.

Possible Sources

Communication Module
DSM
BCM

K1 CONFIRM THE CUSTOMER CONCERN

The ignition is on.

Make sure the observed symptom is present.

Is the observed symptom present?

Yes

GO to K2

No	The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

K2 CHECK THE COMMUNICATION NETWORK

The ignition is on.

Using a scan tool, perform the network test.

Does the BCM pass the network test?

Yes

GO to K3

No	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

K3 RECHECK THE DSM (DRIVER SEAT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Using the scan tool, repeat the DSM self-test.

Is DTC U0140:00 still present?

Yes

GO to K4

No	The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

K4 CHECK DTC U0140:00 IN OTHER MODULES

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

The ignition is on.

Wait 10 seconds.

Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0140:00 set in any other modules?

Yes

INSTALL a new BCM.
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

No	INSTALL a new DSM. REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).

DIAGNOSTIC PINPOINT TEST L: MULTI-CONTOUR SEAT INOPERATIVE / INCORRECT OPERATION – DRIVER

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCMG B146F: 00	Rear Bladder Electro-Pneumatic Malfunction: No Subtype Information	During the self-test, the system inflates each bladder in the seat back, then monitors the pressure change. If the pressure change is not within the acceptable threshold, this DTC is set.
SCMG B146F: 04	Rear Bladder Electro-Pneumatic Failure: Internal System Failures	During the self-test, the system inflates each bladder in the seat back, then monitors the pressure change. If the bladders inflate successfully, the system deflates the bladder and monitors the pressure change. If the pressure change is outside the acceptable threshold, this DTC is set.
SCMG B1470:00	Electro-Pneumatic Bladder System Fault: No Sub-type Information	During the self-test, the system inflates each bladder in the seat cushion, then monitors the pressure change. If the pressure change is not within the acceptable threshold, this DTC is set.
DTC B1470:04	Electro-Pneumatic Bladder System Fault: Internal System Faults	During the self-test, the system inflates each bladder in the seat cushion, then monitors the pressure change. If the bladders inflate successfully, the system deflates the bladder and monitors the pressure change. If the pressure change is outside the acceptable threshold, this DTC is set.
SCMG B1471:11	Multi-Contour Seat Switch Input: Short to Ground	This DTC is set when the multi-contour seat control switch input circuit is shorted to ground. This DTC may be set on demand or in continuous memory.
SCMG B1471:13	Multi-Contour Seat Switch Input: Open Circuit	This DTC is set when the multi-contour seat control switch input circuit is open. This DTC may be set on demand or in continuous memory.
DTC B1471:2A	Multi-Contour Seat Switch Input: Stuck in Range	If the seat control switch is active for more than 2 minutes or is active during the self-test, the SCMG sets this DTC.
SCMG B1473:11	Pump Driver: Short to Ground	This DTC is set when the current draw of the air pump driver is too high for a specified period of time. This DTC may be set on demand or in continuous memory.

Possible Sources

Wiring, Terminals or Connectors
Seat Control Switch
Front Seat Power Lumbar
Front Seat Cushion Bladder
SCMG

Visual Inspection and Pre-checks

Make sure all hose connections to the SCMG are installed correctly and are not leaking, and/or check for any signs of restriction (kinked or pinched hoses).

L1 CHECK THE SCMG (DRIVER SEAT MULTI-CONTOUR MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

The ignition is on.

NOTE: If the diagnostic scan tool does not communicate with the SCMG,
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

Using the diagnostic scan tool, perform the SCMG self-test.

Were any Diagnostic Trouble Codes (DTCs) retrieved?

Yes

For B1471:11 GO to L3
For B1471:13 GO to L5
For B1471:2A MAKE SURE there are no obstructions that could be causing the multi-contour seat switch to stick in a particular position. If OK, INSTALL a new seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation). For B1473:11 GO to L2
If both B146F:00 and B1470:00 are present, GO to L7.
For B146F:00 or B146F:04 GO to L13
For B1470:00 or B1470:04 GO to L17
For information on all other Diagnostic Trouble Codes (DTCs), REFER TO the SCMG DTC Chart.

No	If the multi-contour seat does not operate, GO to L7. If only the seat back bladder(s) do not operate correctly, GO to L13. If only the seat cushion bladder(s) do not operate correctly, GO to L17.

L2 CHECK THE MULTI-CONTOUR SEAT CONTROL PUMP SUPPLY FOR A SHORT TO GROUND

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: SCMG C3385.

Disconnect: Left Multi-Contour Seat Control Pump C3048.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3048-1 Ground

Is the resistance greater than 10000 Ohms?

Yes

INSTALL a new front seat power lumbar assembly.
REFER TO: Front Power Lumbar Seat Assembly - Vehicles With: Multi-Contour Seats (501-10A Front Seats, Removal and Installation).
GO to L22

No	REPAIR the circuit. GO to L22

L3 RECHECK THE SCMG (DRIVER SEAT MULTI-CONTOUR MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) WITH THE SEAT CONTROL SWITCH DISCONNECTED

Ignition OFF.

Disconnect: Driver Seat Control Switch C3380.

The ignition is on.

Using the diagnostic scan tool, perform the SCMG self-test.

Was DTC B1471:13 retrieved?

Yes

INSTALL a new seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).

GO to L4

L4 CHECK THE SEAT CONTROL SWITCH CIRCUIT FOR A SHORT TO GROUND

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: SCMG C3385.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3380-2 Ground

Is the resistance greater than 10000 Ohms?

Yes

GO to L21

No	REPAIR the circuit. GO to L22

L5 RECHECK THE SCMG (DRIVER SEAT MULTI-CONTOUR MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) WITH A JUMPER WIRE CONNECTED TO THE SEAT CONTROL SWITCH HARNESS CONNECTOR

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Driver Seat Control Switch C3380.

Connect a fused jumper wire:
Click to display connectors

Positive lead Measurement/Action Negative lead

C3380-1 C3380-2

The ignition is on.

Using the diagnostic scan tool, perform the SCMG self-test.

Was DTC B1471:11 retrieved?

Yes

REMOVE the fuse jumper. INSTALL a new seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to L22

No	REMOVE the fuse jumper. GO to L6

L6 CHECK THE SEAT CONTROL SWITCH CIRCUITS FOR AN OPEN CIRCUIT

Ignition OFF.

Disconnect: SCMG C3385.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3380-1 C3385-15

C3380-2 C3385-11

Is the resistance less than 3 ohms?

Yes

GO to L21

No	REPAIR the faulty circuit. GO to L22

L7 MAKE SURE THE MULTI-CONTOUR SEAT CONTROL PUMP OPERATES

Ignition OFF.

The ignition is on.

NOTE: In MASSAGE mode, the multi-contour seat control pump runs continuously. Using the seat control switch or the touchscreen, place the multi-contour seat in MASSAGE mode.

Listen at the seat back to determine if the multi-contour seat control pump turns on.

Does the multi-contour seat control pump turn on?

Yes

GO to L11

GO to L8

L8 CHECK THE MULTI-CONTOUR SEAT CONTROL PUMP GROUND FOR AN OPEN CIRCUIT

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Left Multi-Contour Seat Control Pump C3048.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3048-2 Ground

Is the resistance less than 3 ohms?

Yes

GO to L9

No	REPAIR the circuit. GO to L22

L9 CHECK THE MULTI-CONTOUR SEAT CONTROL PUMP SUPPLY VOLTAGE

NOTICE: The following step uses a test lamp to simulate normal circuit loads. Use only the Rotunda test lamp (SGT27000) or a 300 mA incandescent lamp. To avoid damage to the connector terminals, use the Rotunda Flex Probe Kit to connect the test lamp probe to the vehicle. Do not use the test lamp probe directly on any connector.

Connect:

Positive lead Measurement/Action Negative lead

C3048-1 C3048-2

The ignition is on.

Using the diagnostic scan tool, cycle the SCMG Seat Bladder Pump State PID (DRV_SBLADR_PMP) while observing the test lamp.

Does the test lamp illuminate?

Yes

INSTALL a new front seat power lumbar assembly.
REFER TO: Front Power Lumbar Seat Assembly - Vehicles With: Multi-Contour Seats (501-10A Front Seats, Removal and Installation).
GO to L22

GO to L10

L10 CHECK THE MULTI-CONTOUR SEAT CONTROL PUMP SUPPLY FOR AN OPEN CIRCUIT

Ignition OFF.

Disconnect: SCMG C3385.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3385-3 C3383-1

Is the resistance less than 3 ohms?

Yes

GO to L21

No	REPAIR the circuit. GO to L22

L11 CHECK THE MULTI-CONTOUR SEAT CONTROL PUMP HOSE FOR CORRECT INSTALLATION OR DAMAGE

Ignition OFF.

NOTE: The multi-contour seat control pump hose is the red hose located inside the blue lock. Visually inspect the multi-contour seat control pump hose for correct installation and damage, and check the hose routing to make sure the hose is not pinched, kinked, twisted, or damaged along its length.

Is the multi-contour seat control pump hose correctly installed and undamaged?

Yes

GO to L12

No	REPAIR the hose or INSTALL a new front seat power lumbar assembly. REFER TO: Front Power Lumbar Seat Assembly - Vehicles With: Multi-Contour Seats (501-10A Front Seats, Removal and Installation). GO to L22

L12 CHECK THE MULTI-CONTOUR SEAT CONTROL PUMP PERFORMANCE

Disconnect the multi-contour seat control pump hose from the SCMG.
- Remove the blue lock (with all 4 hoses).
- Disconnect the red hose from the blue lock.

Connect a suitable pressure gauge to the red multi-contour seat control pump hose.

The ignition is on.

NOTE: In MASSAGE mode, the multicontour seat pump runs continuously. Using the seat control switch or touchscreen, place the multicontour seat in MASSAGE mode while observing the pressure gauge. Record the maximum pressure achieved.

Ignition OFF.

Was the pressure equal to or greater than 169 kPa (24.5 psi)?

Yes

GO to L23

No	REPAIR the hose or INSTALL a new front seat power lumbar assembly. REFER TO: Front Power Lumbar Seat Assembly - Vehicles With: Multi-Contour Seats (501-10A Front Seats, Removal and Installation). GO to L22

L13 INFLATE SUSPECT SEATBACK BLADDER(S) WHILE MONITORING PRESSURE PARAMETER IDENTIFICATIONS (PIDS)

The ignition is on.

Using the diagnostic scan tool, select and monitor the SCMG Parameter Identifications (PIDs) for the suspect bladder as indicated in the table below:

Access SCMG and monitor UPPR_LUMB PID
Access SCMG and monitor MID_LUMB PID
Access SCMG and monitor LOW_LUMB PID
Access SCMG and monitor LUM_BLADR1 (kPa) PID
Access SCMG and monitor LUM_BLADR2 (kPa) PID
Access SCMG and monitor LUM_BLADR3 (kPa) PID

Output State Control PID	Pressure PID
Seatback Lumbar
UPPR_LUMB (upper lumbar bladder inflation status)	LUM_BLADR1 (lumbar bladder 1 pressure)
MID_LUMB (middle lumbar bladder inflation status)	LUM_BLADR2 (lumbar bladder 2 pressure)
LOW_LUMB (lower lumbar bladder inflation status)	LUM_BLADR3 (lumbar bladder 3 pressure)

NOTE: During this step, the multicontour seat pump remains on continuously until the Output State Control PID returns to the OFF (NO) state. Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to INFLATE until the Pressure PID reaches its maximum value. Record the maximum pressure achieved.

Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to NO.

Continue to monitor the Pressure Parameter Identification (PID) for 2 minutes to check for air leaks in the system.

Was the suspect bladder(s) inflated to approximately 169 kPa (24.5 psi) and held within 7 kPa (1 psi) for 2 minutes?

Yes

GO to L14

GO to L16

L14 VENT SUSPECT SEATBACK BLADDER(S) WHILE MONITORING PRESSURE PARAMETER IDENTIFICATIONS (PIDS)

Using the diagnostic scan tool, select and monitor the SCMG Parameter Identifications (PIDs) for the suspect bladder as indicated in the table below:

Access SCMG and monitor UPPR_LUMB PID
Access SCMG and monitor MID_LUMB PID
Access SCMG and monitor LOW_LUMB PID
Access SCMG and monitor LUM_BLADR1 (kPa) PID
Access SCMG and monitor LUM_BLADR2 (kPa) PID
Access SCMG and monitor LUM_BLADR3 (kPa) PID

Output State Control PID	Pressure PID
Seatback Lumbar
UPPR_LUMB (upper lumbar bladder inflation status)	LUM_BLADR1 (lumbar bladder 1 pressure)
MID_LUMB (middle lumbar bladder inflation status)	LUM_BLADR2 (lumbar bladder 2 pressure)
LOW_LUMB (lower lumbar bladder inflation status)	LUM_BLADR3 (lumbar bladder 3 pressure)

Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to VENT until the Pressure PID reaches its minimum value.

Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to NO.

Did the bladder pressure(s) drop to approximately 100 kPa (14.5 psi)?

Yes

GO to L23

GO to L15

L15 CHECK SEATBACK HOSE(S) FOR CORRECT ROUTING, CONNECTION OR DAMAGE

Ignition OFF.

Visually inspect the seatback hose(s) for correct routing or damage, and check the hose harness to make sure the entire length of hose is not pinched, bent, twisted or damaged.
Blue lock:
- Yellow hose - lumbar bladder 3 (lower)
- Clear green hose - lumbar bladder 2 (middle)
- Clear hose - lumbar bladder 1 (upper)

Are the seatback hoses correctly routed, undamaged and free of kinks?

Yes

GO to L23

No	REPAIR the hose(s) or INSTALL a new power front seat lumbar support assembly. REFER TO: Power Front Seat Lumbar Support Assembly - Vehicles With: Multicontour Seats (501-10A Front Seats, Removal and Installation).

L16 CHECK SEATBACK HOSES FOR LEAKS

Ignition OFF.

NOTE: To disconnect the suspect hose(s), first remove the applicable lock assembly (with all applicable hoses). Once removed, individual hoses can be detached from the lock. Disconnect the suspect seatback hose(s) from the SCMG.
Blue lock:
- Yellow hose - lumbar bladder 3 (lower)
- Clear green hose - lumbar bladder 2 (middle)
- Clear hose - lumbar bladder 1 (upper)

Connect a suitable hand vacuum/pressure pump (with gauge) to the suspect seatback hose.

NOTICE: To avoid damage to the power front seat lumbar support assembly, do not exceed 169 kPa (24.5 psi) during this step. Inflate the suspect seatback hose and bladder to 138 kPa (20 psi).

Continue to monitor the gauge for 2 minutes to check for air leaks in the system.

Was the suspect bladder(s) inflated to 138 kPa (20 psi) and held within 7 kPa (1 psi) for 2 minutes?

Yes

GO to L23

No	INSTALL a new power front seat lumbar support assembly. REFER TO: Power Front Seat Lumbar Support Assembly - Vehicles With: Multicontour Seats (501-10A Front Seats, Removal and Installation).

L17 INFLATE SEAT CUSHION BLADDER(S) WHILE MONITORING PRESSURE PARAMETER IDENTIFICATIONS (PIDS)

The ignition is on.

Using the diagnostic scan tool, select and monitor the SCMG Parameter Identifications (PIDs) for the suspect bladder as indicated in the table below:

Access SCMG and monitor SC_INFLAT1 PID
Access SCMG and monitor SC_INFLAT2 PID
Access SCMG and monitor SC_INFLAT3 PID
Access SCMG and monitor SC_INFLAT4 PID
Access SCMG and monitor SC_BLADDR1 (kPa) PID
Access SCMG and monitor SC_BLADDR2 (kPa) PID
Access SCMG and monitor SC_BLADDR3 (kPa) PID
Access SCMG and monitor SC_BLADDR4 (kPa) PID

Output State Control PID	Pressure PID
Seat Cushion
SC_INFLAT1 (seat cushion bladder 1 inflation status)	SC_BLADDR1 (seat cushion bladder 1 pressure)
SC_INFLAT2 (seat cushion bladder 2 inflation status)	SC_BLADDR2 (seat cushion bladder 2 pressure)
SC_INFLAT3 (seat cushion bladder 3 inflation status)	SC_BLADDR3 (seat cushion bladder 3 pressure)
SC_INFLAT4 (seat cushion bladder 4 inflation status)	SC_BLADDR4 (seat cushion bladder 4 pressure)

NOTE: During this step, the multicontour seat pump remains on continuously until the Output State Control PID returns to the OFF (NO) state. Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to INFLATE until the Pressure PID reaches its maximum value. Record the maximum pressure achieved.

Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to NO.

Continue to monitor the Pressure Parameter Identification (PID) for 2 minutes to check for air leaks in the system.

Was the suspect bladder(s) inflated to approximately 169 kPa (24.5 psi) and held within 7 kPa (1 psi) for 2 minutes?

Yes

GO to L18

GO to L20

L18 VENT SEAT CUSHION BLADDER(S) WHILE MONITORING PRESSURE PARAMETER IDENTIFICATIONS (PIDS)

Using the diagnostic scan tool, select and monitor the SCMG Parameter Identifications (PIDs) for the suspect bladder as indicated in the table below:

Access SCMG and monitor SC_INFLAT1 PID
Access SCMG and monitor SC_INFLAT2 PID
Access SCMG and monitor SC_INFLAT3 PID
Access SCMG and monitor SC_INFLAT4 PID
Access SCMG and monitor SC_BLADDR1 (kPa) PID
Access SCMG and monitor SC_BLADDR2 (kPa) PID
Access SCMG and monitor SC_BLADDR3 (kPa) PID
Access SCMG and monitor SC_BLADDR4 (kPa) PID

Output State Control PID	Pressure PID
Seat Cushion
SC_INFLAT1 (seat cushion bladder 1 inflation status)	SC_BLADDR1 (seat cushion bladder 1 pressure)
SC_INFLAT2 (seat cushion bladder 2 inflation status)	SC_BLADDR2 (seat cushion bladder 2 pressure)
SC_INFLAT3 (seat cushion bladder 3 inflation status)	SC_BLADDR3 (seat cushion bladder 3 pressure)
SC_INFLAT4 (seat cushion bladder 4 inflation status)	SC_BLADDR4 (seat cushion bladder 4 pressure)

Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to VENT until the Pressure PID reaches its minimum value.

Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to NO.

Did the bladder pressure(s) drop to approximately 100 kPa (14.5 psi)?

Yes

GO to L23

GO to L19

L19 CHECK SEAT CUSHION HOSE(S) FOR CORRECT ROUTING, CONNECTION OR DAMAGE

Ignition OFF.

Visually inspect the air bag hose(s) for correct installation or damage, and check the hose routing to make sure the hose is not restricted (kinks, pinches, etc.) along its entire length.
Orange lock:
- Black hose - Seat cushion bladder 4 (front right)
- Clear blue hose - Seat cushion bladder 3 (rear right)
- Blue hose - Seat cushion bladder 2 (rear left)
- Green hose - Seat cushion bladder 1 (front left)

Are the seat cushion hoses correctly routed, undamaged and free of kinks?

Yes

GO to L23

No	REPAIR the hose(s) or INSTALL a new front seat cushion regulator. REFER TO: Front Seat Cushion Regulator - Vehicles With: Multi-Contour Seats (501-10A Front Seats, Removal and Installation).

L20 CHECK THE CUSHION HOSES FOR LEAKS

Ignition OFF.

NOTE: To disconnect the suspect hose(s), first remove the applicable lock (with all related hoses) as an assembly. Once removed, the individual hoses can be disconnected from the lock. Disconnect the suspect seat cushion hose(s) from the SCMG.
Orange lock:
- Black hose - Seat cushion bladder 4 (front right)
- Clear blue hose - Seat cushion bladder 3 (rear right)
- Blue hose - Seat cushion bladder 2 (rear left)
- Green hose - Seat cushion bladder 1 (front left)

Connect a suitable hand-held vacuum/pressure pump (with gauge) to the suspect cushion hose.

NOTICE: To avoid damage to the front seat cushion regulator, do not exceed 169 kPa (24.5 psi) during this step. Carefully inflate the suspect cushion hose to approximately 138 kPa (20 psi).

Continue to monitor the gauge for 2 minutes to check for air leaks in the system.

Was the suspect bladder(s) inflated to approximately 138 kPa (20 psi) and held within 7 kPa (1 psi) for 2 minutes?

Yes

GO to L23

No	INSTALL a new front seat cushion regulator. REFER TO: Front Seat Cushion Regulator - Vehicles With: Multi-Contour Seats (501-10A Front Seats, Removal and Installation).

L21 CHECK THE SCMG (DRIVER SEAT MULTI-CONTOUR MODULE) OPERATION

Ignition OFF.

Disconnect and inspect the SCMG connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the SCMG connector. Make sure that it is correctly installed and latched.

NOTE: Do not reconnect the driver side inflatable air bag C3333 at this time. Reconnect all previously disconnected connectors and hoses.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles apply to this concern, INSTALL a new SCMG.
REFER TO: Driver Seat Multi-Contour Module [SCMG] (501-10A Front Seats, Removal and Installation).
GO to L22

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal concerns. GO to L22

L22 CHECK SRS (SUPPLEMENTAL RESTRAINT SYSTEM) OPERATION - PASSED

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Driver Side Air Bag C3333.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

L23 CHECK THE SCMG (DRIVER SEAT MULTI-CONTOUR MODULE) OPERATION

Ignition OFF.

Disconnect and inspect the SCMG connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the SCMG connector. Make sure that it is correctly installed and latched.

Reconnect all previously disconnected connectors and hoses.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles apply to this concern, INSTALL a new SCMG.
REFER TO: Driver Seat Multi-Contour Module [SCMG] (501-10A Front Seats, Removal and Installation).

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

DIAGNOSTIC PINPOINT TEST M: MULTI-CONTOUR SEAT INOPERATIVE / INCORRECT OPERATION – PASSENGER

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCMG B146F:00	Rear Bladder Electro-Pneumatic Malfunction: No Subtype Information	During the self-test, the system inflates each bladder in the seat back, then monitors the pressure change. If the pressure change is not within the acceptable threshold, this DTC is set.
SCMG B146F:04	Rear Bladder Electro-Pneumatic Failure: Internal System Failures	During the self-test, the system inflates each bladder in the seat back, then monitors the pressure change. If the bladders inflate successfully, the system deflates the bladder and monitors the pressure change. If the pressure change is outside the acceptable threshold, this DTC is set.
SCMG B1470:00	Electro-Pneumatic Bladder System Fault: No Sub-type Information	During the self-test, the system inflates each bladder in the seat cushion, then monitors the pressure change. If the pressure change is not within the acceptable threshold, this DTC is set.
SCMG B1470:04	Electro-Pneumatic Bladder System Fault: Internal System Faults	During the self-test, the system inflates each bladder in the seat cushion, then monitors the pressure change. If the bladders inflate successfully, the system deflates the bladder and monitors the pressure change. If the pressure change is outside the acceptable threshold, this DTC is set.
SCMG B1471:11	Multi-Contour Seat Switch Input: Short to Ground	This DTC is set when the multi-contour seat control switch input circuit is shorted to ground. This DTC may be set on demand or in continuous memory.
SCMG B1471:13	Multi-Contour Seat Switch Input: Open Circuit	This DTC is set when the multi-contour seat control switch input circuit is open. This DTC may be set on demand or in continuous memory.
SCMG B1471:2A	Multi-Contour Seat Switch Input: Stuck in Range	If the seat control switch is active for more than 2 minutes or is active during the self-test, the SCMH sets this DTC.
SCMH B1473:11	Pump Driver: Short to Ground	This DTC is set when the current draw of the air pump driver is too high for a specified period of time. This DTC may be set on demand or in continuous memory.

Possible Sources

Wiring, Terminals or Connectors
Seat Control Switch
Front Seat Power Lumbar
Front Seat Cushion Bladder
SCMG

Visual Inspection and Pre-checks

Make sure that all hose connections to the SCMH are correctly installed and free of leaks, and/or check for any signs of restriction (kinks or pinched hoses).

M1 CHECK THE SCMH (PASSENGER SEAT MULTI-CONTOUR MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

The ignition is on.

NOTE: If the diagnostic scan tool does not communicate with the SCMH,
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

Using the diagnostic scan tool, perform the SCMH self-test.

Were any Diagnostic Trouble Codes (DTCs) retrieved?

Yes

For B1471:11 GO to M3.
For B1471:13 GO to M5.
For B1471:2A CHECK for any obstructions that may be causing the multi-contour seat switch to stick in a particular position. If none are found, INSTALL a new seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation). For B1473:11 GO to M2.
If both B146F:00 and B1470:00 are present, GO to M7.
For B146F:00 or B146F:04 GO to M13.
For B1470:00 or B1470:04 GO to M17.
For information on all other diagnostic trouble codes (DTCs), REFER TO the SCMH DTC Chart.

No	If the multi-contour seat does not operate, GO to M7. If only the seat back bladder(s) do not operate correctly, GO to M13. If only the seat cushion bladder(s) do not operate correctly, GO to M17.

M2 CHECK THE MULTI-CONTOUR SEAT CONTROL PUMP SUPPLY FOR A SHORT TO GROUND

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: SCMH C3386.

Disconnect: Right multi-contour seat control pump C3052.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3052-1 Ground

Is the resistance greater than 10000 Ohms?

Yes

INSTALL a new front seat power lumbar assembly.
REFER TO: Front Power Lumbar Seat Assembly - Vehicles With: Multi-Contour Seats (501-10A Front Seats, Removal and Installation).
GO to M22

No	REPAIR the circuit. GO to M22

M3 RECHECK THE SCMH (PASSENGER SEAT MULTI-CONTOUR MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) WITH THE SEAT CONTROL SWITCH DISCONNECTED

Ignition OFF.

Disconnect: Passenger seat control switch C3390.

The ignition is on.

Using the diagnostic scan tool, perform the SCMH self-test.

Was DTC B1471:13 retrieved?

Yes

INSTALL a new seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).

GO to M4

M4 CHECK THE SEAT SWITCH CIRCUIT FOR A SHORT TO GROUND

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: SCMH C3386.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3390-9 Ground

Is the resistance greater than 10000 Ohms?

Yes

GO to M21

No	REPAIR the circuit. GO to M22

M5 RECHECK THE SCMH (PASSENGER SEAT MULTI-CONTOUR MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) WITH THE SEAT SWITCH CONNECTOR JUMPER INSTALLED

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: Passenger seat control switch C3390.

Connect a fused jumper wire:
Click to display connectors

Positive lead Measurement/Action Negative lead

C3390-20 C3390-9

The ignition is on.

Using the diagnostic scan tool, perform the SCMH self-test.

Was DTC B1471:11 retrieved?

Yes

REMOVE the fuse jumper. INSTALL a new seat control switch.
REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
GO to M22

No	REMOVE the fuse jumper. GO to M6

M6 CHECK THE SEAT CONTROL SWITCH CIRCUITS FOR AN OPEN

Ignition OFF.

Disconnect: SCMH C3386.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3390-20 C3386-15

C3390-9 C3386-11

Is the resistance less than 3 ohms?

Yes

GO to M21

No	REPAIR the faulty circuit. GO to M22

M7 CHECK THE MULTI-CONTOUR SEAT CONTROL PUMP OPERATION

Ignition OFF.

The ignition is on.

NOTE: For the massage mode to operate, a person must be seated in the passenger seat. NOTE: In MASSAGE mode, the multi-contour seat control pump runs continuously. Using the seat control switch or the touchscreen, set the multi-contour seat to MASSAGE mode.

Listen at the seat back to determine if the multi-contour seat control pump turns on.

Does the multi-contour seat control pump turn on?

Yes

GO to M11

GO to M8

M8 CHECK THE MULTI-CONTOUR SEAT CONTROL PUMP GROUND FOR AN OPEN

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: Right multi-contour seat control pump C3052.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3052-2 Ground

Is the resistance less than 3 ohms?

Yes

GO to M9

No	REPAIR the circuit. GO to M22

M9 CHECK THE MULTI-CONTOUR SEAT CONTROL PUMP SUPPLY VOLTAGE

Connect:

Positive lead Measurement/Action Negative lead

C3052-1 C3052-2

The ignition is on.

Using the diagnostic scan tool, cycle the SCMH Seat Bladder Pump Status PID (SBLADR_PMP) and observe the indicator light.

Does the test lamp illuminate?

Yes

INSTALL a new front seat power lumbar assembly.
REFER TO: Front Power Lumbar Seat Assembly - Vehicles With: Multi-Contour Seats (501-10A Front Seats, Removal and Installation).
GO to M22

GO to M10

M10 CHECK THE MULTI-CONTOUR SEAT CONTROL PUMP SUPPLY FOR AN OPEN CIRCUIT

Ignition OFF.

Disconnect: SCMH C3386.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3386-3 C3384-1

Is the resistance less than 3 ohms?

Yes

GO to M21

No	REPAIR the circuit. GO to M22

M11 CHECK THE MULTI-CONTOUR SEAT CONTROL PUMP HOSE FOR CORRECT INSTALLATION OR DAMAGE

Ignition OFF.

NOTE: The multi-contour seat control pump hose is the red hose located inside the blue lock. Visually inspect the multi-contour seat control pump hose for correct installation and damage, and check the hose routing to make sure the hose is not pinched, kinked, twisted, or damaged along its length.

Is the multi-contour seat control pump hose correctly installed and undamaged?

Yes

GO to M12

No	REPAIR the hose or INSTALL a new power front seat lumbar assembly. REFER TO: Front Power Seat Lumbar Assembly - Vehicles With: Multi-Contour Seats (501-10A Front Seats, Removal and Installation). GO to M22

M12 CHECK THE MULTI-CONTOUR SEAT CONTROL PUMP PERFORMANCE

Disconnect the multi-contour seat control pump hose from the SCMH.
- Remove the blue lock (with all 4 hoses).
- Disconnect the red hose from the blue lock.

Connect a suitable pressure gauge to the red multi-contour seat control pump hose.

The ignition is on.

NOTE: For the massage mode to operate, a person must be seated in the passenger seat. NOTE: In MASSAGE mode, the multi-contour seat control pump runs continuously. Using the seat control switch or the touchscreen, place the multi-contour seat in MASSAGE mode while observing the pressure gauge. Record the maximum pressure obtained.

Ignition OFF.

Was the pressure equal to or greater than 169 kPa (24.5 psi)?

Yes

GO to M23

No	REPAIR the hose or INSTALL a new power front seat lumbar assembly. REFER TO: Front Power Seat Lumbar Assembly - Vehicles With: Multi-Contour Seats (501-10A Front Seats, Removal and Installation). GO to M22

M13 INFLATE THE SUSPECTED BACKREST BLADDER(S) WHILE MONITORING PRESSURE PARAMETER IDENTIFICATIONS (PIDS)

The ignition is on.

Using the diagnostic scan tool, select and view the SCMH parameter identifications (PIDs) for the suspected bladder(s), as shown in the table below:

Access SCMG and monitor UPPR_LUMB PID
Access SCMG and monitor MID_LUMB PID
Access SCMG and monitor LOW_LUMB PID
Access SCMG and monitor LUM_BLADR1 (kPa) PID
Access SCMG and monitor LUM_BLADR2 (kPa) PID
Access SCMG and monitor LUM_BLADR3 (kPa) PID

Output State Control PID	Pressure PID
Seatback Lumbar
UPPR_LUMB (upper lumbar bladder inflation status)	LUM_BLADR1 (lumbar bladder 1 pressure)
MID_LUMB (middle lumbar bladder inflation status)	LUM_BLADR2 (lumbar bladder 2 pressure)
LOW_LUMB (lower lumbar bladder inflation status)	LUM_BLADR3 (lumbar bladder 3 pressure)

NOTE: During this step, the multicontour seat pump remains on continuously until the Output State Control PID returns to the OFF (NO) state. Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to INFLATE until the Pressure PID reaches its maximum value. Record the maximum pressure achieved.

Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to NO.

Continue to monitor the Pressure Parameter Identification (PID) for 2 minutes to check for air leaks in the system.

Was the suspect bladder(s) inflated to approximately 169 kPa (24.5 psi) and held within 7 kPa (1 psi) for 2 minutes?

Yes

GO to M14

GO to M16

M14 VENT THE SUSPECTED BACKREST BLADDER(S) WHILE MONITORING PRESSURE PARAMETER IDENTIFICATIONS (PIDS)

Using the diagnostic scan tool, select and view the SCMH parameter identifications (PIDs) for the suspected bladder(s), as shown in the table below:

Access SCMG and monitor UPPR_LUMB PID
Access SCMG and monitor MID_LUMB PID
Access SCMG and monitor LOW_LUMB PID
Access SCMG and monitor LUM_BLADR1 (kPa) PID
Access SCMG and monitor LUM_BLADR2 (kPa) PID
Access SCMG and monitor LUM_BLADR3 (kPa) PID

Output State Control PID	Pressure PID
Seatback Lumbar
UPPR_LUMB (upper lumbar bladder inflation status)	LUM_BLADR1 (lumbar bladder 1 pressure)
MID_LUMB (middle lumbar bladder inflation status)	LUM_BLADR2 (lumbar bladder 2 pressure)
LOW_LUMB (lower lumbar bladder inflation status)	LUM_BLADR3 (lumbar bladder 3 pressure)

Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to VENT until the Pressure PID reaches its minimum value.

Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to NO.

Did the bladder pressure(s) drop to approximately 100 kPa (14.5 psi)?

Yes

GO to M23

GO to M15

M15 CHECK THE BACKREST HOSE(S) FOR CORRECT INSTALLATION, ROUTING OR DAMAGE

Ignition OFF.

Visually inspect the seatback hose(s) for correct routing or damage, and check the hose harness to make sure the entire length of hose is not pinched, bent, twisted or damaged.
Blue lock:
- Yellow hose - lumbar bladder 3 (lower)
- Clear green hose - lumbar bladder 2 (middle)
- Clear hose - lumbar bladder 1 (upper)

Are the seatback hoses correctly routed, undamaged and free of kinks?

Yes

GO to M23

No	REPAIR the hose(s) or INSTALL a new power front seat lumbar support assembly. REFER TO: Power Front Seat Lumbar Support Assembly - Vehicles With: Multicontour Seats (501-10A Front Seats, Removal and Installation).

M16 CHECK THE BACKREST HOSES FOR LEAKS

Ignition OFF.

NOTE: To disconnect the suspect hose(s), first remove the applicable clamp (with all applicable hoses) as an assembly. Once removed, individual hoses can be removed from the clamp. Disconnect the suspect backrest hose(s) from the SCMH.
Blue lock:
- Yellow hose - lumbar bladder 3 (lower)
- Clear green hose - lumbar bladder 2 (middle)
- Clear hose - lumbar bladder 1 (upper)

Connect a suitable hand vacuum/pressure pump (with gauge) to the suspect seatback hose.

NOTICE: To avoid damage to the power front seat lumbar support assembly, do not exceed 169 kPa (24.5 psi) during this step. Inflate the suspect seatback hose and bladder to 138 kPa (20 psi).

Continue to monitor the gauge for 2 minutes to check for air leaks in the system.

Was the suspect bladder(s) inflated to 138 kPa (20 psi) and held within 7 kPa (1 psi) for 2 minutes?

Yes

GO to M23

No	INSTALL a new power front seat lumbar support assembly. REFER TO: Power Front Seat Lumbar Support Assembly - Vehicles With: Multicontour Seats (501-10A Front Seats, Removal and Installation).

M17 INFLATE THE CUSHION BLADDER(S) WHILE MONITORING PRESSURE PARAMETER IDENTIFICATIONS (PIDS)

The ignition is on.

Using the diagnostic scan tool, select and view the SCMH parameter identifications (PIDs) for the suspected bladder(s), as shown in the table below:

Access SCMG and monitor SC_INFLAT1 PID
Access SCMG and monitor SC_INFLAT2 PID
Access SCMG and monitor SC_INFLAT3 PID
Access SCMG and monitor SC_INFLAT4 PID
Access SCMG and monitor SC_BLADDR1 (kPa) PID
Access SCMG and monitor SC_BLADDR2 (kPa) PID
Access SCMG and monitor SC_BLADDR3 (kPa) PID
Access SCMG and monitor SC_BLADDR4 (kPa) PID

Output State Control PID	Pressure PID
Seat Cushion
SC_INFLAT1 (seat cushion bladder 1 inflation status)	SC_BLADDR1 (seat cushion bladder 1 pressure)
SC_INFLAT2 (seat cushion bladder 2 inflation status)	SC_BLADDR2 (seat cushion bladder 2 pressure)
SC_INFLAT3 (seat cushion bladder 3 inflation status)	SC_BLADDR3 (seat cushion bladder 3 pressure)
SC_INFLAT4 (seat cushion bladder 4 inflation status)	SC_BLADDR4 (seat cushion bladder 4 pressure)

NOTE: During this step, the multicontour seat pump remains on continuously until the Output State Control PID returns to the OFF (NO) state. Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to INFLATE until the Pressure PID reaches its maximum value. Record the maximum pressure achieved.

Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to NO.

Continue to monitor the Pressure Parameter Identification (PID) for 2 minutes to check for air leaks in the system.

Did the suspect bladder(s) inflate to approximately 169 kPa (24.5 psi) and hold pressure within 7 kPa (1 psi) for 2 minutes?

Yes

GO to M18

GO to M20

M18 VENT THE CUSHION BLADDER(S) WHILE MONITORING PRESSURE PARAMETER IDENTIFICATIONS (PIDS)

Using the diagnostic scan tool, select and view the SCMH parameter identifications (PIDs) for the suspected bladder(s), as shown in the table below:

Access SCMG and monitor SC_INFLAT1 PID
Access SCMG and monitor SC_INFLAT2 PID
Access SCMG and monitor SC_INFLAT3 PID
Access SCMG and monitor SC_INFLAT4 PID
Access SCMG and monitor SC_BLADDR1 (kPa) PID
Access SCMG and monitor SC_BLADDR2 (kPa) PID
Access SCMG and monitor SC_BLADDR3 (kPa) PID
Access SCMG and monitor SC_BLADDR4 (kPa) PID

Output State Control PID	Pressure PID
Seat Cushion
SC_INFLAT1 (seat cushion bladder 1 inflation status)	SC_BLADDR1 (seat cushion bladder 1 pressure)
SC_INFLAT2 (seat cushion bladder 2 inflation status)	SC_BLADDR2 (seat cushion bladder 2 pressure)
SC_INFLAT3 (seat cushion bladder 3 inflation status)	SC_BLADDR3 (seat cushion bladder 3 pressure)
SC_INFLAT4 (seat cushion bladder 4 inflation status)	SC_BLADDR4 (seat cushion bladder 4 pressure)

Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to VENT until the Pressure PID reaches its minimum value.

Using the diagnostic scan tool, set the Output State Control PID of the suspect bladder(s) to NO.

Did the bladder pressure(s) drop to approximately 100 kPa (14.5 psi)?

Yes

GO to M23

GO to M19

M19 CHECK THE CUSHION HOSE(S) FOR CORRECT INSTALLATION, ROUTING OR DAMAGE

Ignition OFF.

Visually inspect the air bag hose(s) for correct installation or damage, and check the hose routing to make sure the hose is not restricted (kinks, pinches, etc.) along its entire length.
Orange lock:
- Black hose - Seat cushion bladder 4 (front right)
- Clear blue hose - Seat cushion bladder 3 (rear right)
- Blue hose - Seat cushion bladder 2 (rear left)
- Green hose - Seat cushion bladder 1 (front left)

Are the seat cushion hoses correctly routed, undamaged and free of kinks?

Yes

GO to M23

No	REPAIR the hose(s) or INSTALL a new front seat cushion regulator. REFER TO: Front Seat Cushion Regulator - Vehicles With: Multi-Contour Seats (501-10A Front Seats, Removal and Installation).

M20 CHECK THE CUSHION HOSES FOR LEAKS

Ignition OFF.

NOTE: To disconnect the suspect hose(s), first remove the applicable clamp (with all applicable hoses) as an assembly. Once removed, individual hoses can be removed from the clamp. Disconnect the suspect cushion hose(s) from the SCMH.
Orange lock:
- Black hose - Seat cushion bladder 4 (front right)
- Clear blue hose - Seat cushion bladder 3 (rear right)
- Blue hose - Seat cushion bladder 2 (rear left)
- Green hose - Seat cushion bladder 1 (front left)

Connect a suitable hand-held vacuum/pressure pump (with gauge) to the suspect cushion hose.

NOTICE: To avoid damage to the front seat cushion regulator, do not exceed 169 kPa (24.5 psi) during this step. Carefully inflate the suspect cushion hose to approximately 138 kPa (20 psi).

Continue to monitor the gauge for 2 minutes to check for air leaks in the system.

Did the suspect bladder(s) inflate to approximately 138 kPa (20 psi) and hold pressure within 7 kPa (1 psi) for 2 minutes?

Yes

GO to M23

No	INSTALL a new front seat cushion regulator. REFER TO: Front Seat Cushion Regulator - Vehicles With: Multi-Contour Seats (501-10A Front Seats, Removal and Installation).

M21 CHECK THE SCMH (PASSENGER MULTI-CONTOUR SEAT MODULE) OPERATION

Ignition OFF.

Disconnect and inspect the SCMH connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the SCMH connector. Make sure that it is properly seated and latched.

NOTE: Do not connect the passenger C3309 integrated side airbag at this time. Reconnect all previously disconnected connectors and hoses.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service article exists for this concern, INSTALL a new SCMH.
REFER TO: Driver Multi-Contour Seat Module [SCMG] (501-10A Front Seats, Removal and Installation).
GO to M22

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal concerns. GO to M22

M22 SRS (SUPPLEMENTAL RESTRAINT SYSTEM) CHECK SUCCESSFULLY COMPLETED

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Passenger Side Air Bag C3309.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

M23 CHECK THE SCMH (PASSENGER MULTI-CONTOUR SEAT MODULE) OPERATION

Ignition OFF.

Disconnect and inspect the SCMH connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the SCMH connector. Make sure that it is properly seated and latched.

Reconnect all previously disconnected connectors and hoses.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service article exists for this concern, INSTALL a new SCMH.
REFER TO: Driver Multi-Contour Seat Module [SCMG] (501-10A Front Seats, Removal and Installation).

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

DIAGNOSTIC PINPOINT TEST N: BOTH HEATED SEATS INOPERATIVE – WITHOUT HEATED/VENTILATED SEATS

REFER TO the Wiring Diagrams, Cell 119, for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

Possible Sources

Fuse
Wiring, Terminals or Connectors
HVAC Module

Visual Inspection and Pre-checks

Make sure that fuse BJB 38 (30 A) is serviceable.

N1 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF.

The ignition is on.

Using the scan tool, perform the HVAC module self-test.

Are there any HVAC module Diagnostic Trouble Codes (DTCs)?

Yes

REFER TO the HVAC Module DTC Chart in this section.

GO to N2

N2 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE SEAT HEATER CONTROL SWITCH PARAMETER IDENTIFICATIONS (PIDS)

Start the engine.

Using a diagnostic scan tool, monitor the Parameter Identification (PID) while pressing and releasing the driver and passenger seat heater control switches.
- Access the HVAC module and monitor the CC_SW_D_HSEATS PID
- Access the HVAC and monitor the CC_SW_P_HSEATS PID

Do the parameter identifications (PIDs) change when the driver and passenger seat heater control switches are pressed and released?

Yes

GO to N3

No	INSTALL a new HVAC module. Refer to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).

N3 CHECK THE SEAT HEATER VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: HVAC Module C228B.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C228B-1 Ground

Is the voltage greater than 11 volts?

Yes

GO to N4

No	CHECK the BDJB fuse 38 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams Manual to determine possible causes of the short circuit.

N4 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE OPERATION

Ignition OFF.

Disconnect and inspect all HVAC module connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Connect the HVAC module connectors. Make sure they are fully seated and locked.

Connect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles are found for this concern, INSTALL a new HVAC module.
Refer to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

DIAGNOSTIC PINPOINT TEST O: DRIVER HEATED SEAT INOPERATIVE – WITHOUT HEATED/VENTILATED SEATS

REFER TO the Wiring Diagrams, Cell 119, for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
HVAC B1034:11	Front Left Seat Heater Element: Short to Ground	Set when the HVAC module determines that the current draw of the left front heater element has exceeded the specified threshold. When this DTC is set, the HVAC module disables the circuit until the ignition is turned on again.
HVAC B1034:12	Front Left Seat Heater Element: Short to Battery	Set when the HVAC module determines that the voltage in the left front heater circuit is above the specified threshold while the driver is active. When this DTC is set, the HVAC module disables the circuit until the ignition is turned on again.
HVAC B1034:13	Front Left Seat Heater Element: Open Circuit	Set when the HVAC module determines that the current draw of the left front heater element is below the specified threshold. When this DTC is set, the HVAC module disables the circuit until the ignition is turned on again.
HVAC B1038:11	Front Left Seat Heater Sensor: Short to Ground	Set when the HVAC module determines that the voltage of the left front heater sensor is outside the specified range. When this DTC is set, the HVAC module disables the circuit until the ignition is turned on again.
HVAC B1038:15	Front Left Seat Heater Sensor: Short to Battery or Open Circuit	Set when the HVAC module determines that the voltage of the left front heater sensor is outside the specified range. When this DTC is set, the HVAC module disables the circuit until the ignition is turned on again.

Possible Sources

Wiring, Terminals or Connectors
Heater Pad
HVAC Module

O1 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF.

The ignition is on.

Using the scan tool, perform the HVAC module self-test.

Are there any HVAC module Diagnostic Trouble Codes (DTCs)?

Yes

For DTC B1034:11, B1034:12 or B1034:13 GO to O4
For DTC B1038:11 or B1038:15 GO to O6
For information on all other diagnostic trouble codes (DTCs), REFER to the HVAC Module DTC Chart.

GO to O2

O2 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE SEAT HEATER CONTROLLER PID (PARAMETER IDENTIFICATION)

Start the engine.

Using a diagnostic scan tool, monitor the HVAC module PID CC_SW_D_HSEATS while pressing and releasing the driver seat heater control switch.

Did the PID change when the driver seat heater control switch was pressed and released?

Yes

GO to O3

No	INSTALL a new HVAC module. Refer to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).

O3 CHECK THE HEATED SEAT VOLTAGE CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: HVAC Module C228B.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C228B-1 Ground

Is the voltage greater than 11 volts?

Yes

GO to O4

No	REPAIR the circuit.

O4 CHECK THE HEATER ELEMENT POWER SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: HVAC module C228B (if not previously disconnected).

Disconnect: Left front seat cushion heater C364.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C364-1 Ground

Is there voltage present?

Yes

REPAIR the circuit. GO to O15

GO to O5

O5 CHECK THE HEATER ELEMENT POWER SUPPLY CIRCUIT FOR AN OPEN OR A SHORT TO GROUND

Ignition OFF.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C364-1 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C364-1 C228B-16

Is the resistance greater than 10,000 Ohms between the driver seat cushion heater pad and ground, and less than 3 Ohms between the driver seat cushion heater pad and the HVAC module?

Yes

GO to O9.

No	REPAIR the circuit. GO to O15

O6 CHECK THE HEATED SEAT TEMPERATURE SENSOR CIRCUIT FOR AN OPEN OR A SHORT TO GROUND

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: HVAC Module C228B.

Disconnect: Left front seat cushion heater C364.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C364-2 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C364-2 C228B-30

Is the resistance greater than 10,000 Ohms between the driver seat cushion heater pad and ground, and less than 3 Ohms between the driver seat cushion heater pad and the HVAC module?

Yes

GO to O7

No	REPAIR the circuit. GO to O15

O7 CHECK THE HEATED SEAT TEMPERATURE SENSOR RETURN CIRCUIT FOR AN OPEN OR A SHORT TO GROUND

Disconnect: HVAC module C228A.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C364-3 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C364-3 C228A-2

Is the resistance greater than 10,000 Ohms between the driver seat cushion heater pad and ground, and less than 3 Ohms between the driver seat cushion heater pad and the HVAC module?

Yes

GO to O8

No	REPAIR the open circuit or REFER to the Wiring Diagrams Manual to determine possible causes of the short circuit. GO to O15

O8 CHECK THE HEATED SEAT TEMPERATURE SENSOR CIRCUIT FOR A SHORT TO VOLTAGE

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C364-2 Ground

Is there voltage present?

Yes

REPAIR the circuit. GO to O15

GO to O13

O9 CHECK THE HEATER ELEMENT GROUND CIRCUIT FOR AN OPEN

Disconnect: Left front seat back heater C365.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C365-2 Ground

Is the resistance less than 0.5 Ohms?

Yes

GO to O10.

No	REPAIR the circuit. GO to O15

O10 CHECK THE HEATED SEAT PAD FOR AN OPEN OR A SHORT TO GROUND

Measure the component side resistance between:

Positive lead Measurement/Action Negative lead

C364-1, component side C364-4, component side

C364-1, component side Ground

Is the resistance between 0.6 and 2 Ohms between pins 1 and 4; and greater than 10,000 Ohms between pin 1 and ground?

Yes

GO to O11.

No	INSTALL a new driver seat cushion heater pad. Refer to: Seat Heater Pad Removal (501-10A Front Seats, General Procedures). GO to O15

O11 CHECK THE HEATED SEAT PAD FOR AN OPEN OR A SHORT TO GROUND

Measure the component side resistance between:

Positive lead Measurement/Action Negative lead

C365-1, component side C365-2, component side

C365-2, component side Ground

Is the resistance between 0.6 and 2 Ohms between pins 1 and 2; and greater than 10,000 Ohms between pin 2 and ground?

Yes

GO to O12.

No	INSTALL a new driver seat back heater pad. Refer to: Seat Heater Pad Removal (501-10A Front Seats, General Procedures). GO to O15

O12 CHECK THE CIRCUIT BETWEEN THE SEAT CUSHION HEATER PAD AND THE SEAT BACK HEATER PAD FOR AN OPEN AND A SHORT TO GROUND

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C364-4 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C364-4 C365-1

Is the resistance greater than 10,000 Ohms between the driver seat cushion heater pad and ground, and less than 3 Ohms between the driver seat cushion heater pad and the seat back heater pad?

Yes

GO to O14

No	REPAIR the circuit. GO to O15

O13 CHECK THE HEATED SEAT TEMPERATURE SENSOR FOR AN OPEN OR A SHORT TO GROUND

Measure the component side resistance between:

Positive lead Measurement/Action Negative lead

C364-2, component side C364-3, component side

C364-2, component side Ground

Is the resistance between 300 and 300,000 Ohms between pins 2 and 3; and greater than 10,000 Ohms between pin 2 and ground?

Yes

GO to O14

No	INSTALL a new driver seat cushion heater pad. Refer to: Seat Heater Pad Removal (501-10A Front Seats, General Procedures). GO to O15

O14 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE OPERATION

Ignition OFF.

Disconnect and inspect all HVAC module connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Connect the HVAC module connectors. Make sure they are fully seated and locked.

NOTE: Do not connect the driver side airbag module C3333 at this time. Connect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles are found for this concern, INSTALL a new HVAC module.
Refer to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).
GO to O15

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal concerns. GO to O15

O15 CHECK THE SRS (SUPPLEMENTAL RESTRAINT SYSTEM) REPAIR VERIFICATION

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Driver Side Air Bag C3333.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST P: PASSENGER HEATED SEAT INOPERATIVE – WITHOUT HEATED/VENTILATED SEATS

REFER TO the Wiring Diagrams, Cell 119, for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
HVAC B1036:11	Front Right Seat Heater Element: Short to Ground	Set when the HVAC module determines that the current draw of the right front heater element has exceeded the specified threshold. When this DTC is set, the HVAC module disables the circuit until the ignition is turned on again.
HVAC B1036:12	Front Right Seat Heater Element: Short to Battery	Set when the HVAC module determines that the voltage in the right front heater circuit is above the specified threshold while the driver is active. When this DTC is set, the HVAC module disables the circuit until the ignition is turned on again.
HVAC B1036:13	Front Right Seat Heater Element: Open Circuit	Set when the HVAC module determines that the current draw of the right front heater element is below the specified threshold. When this DTC is set, the HVAC module disables the circuit until the ignition is turned on again.
HVAC B103A: 11	Front Right Seat Heater Sensor: Short to Ground	Set when the HVAC module detects that the voltage of the right front heater sensor is outside the acceptable range. When this DTC sets, the HVAC module disables the circuit until the ignition is turned on again.
HVAC B103A: 15	Front Right Seat Heater Sensor: Short to Battery or Open Circuit	Set when the HVAC module detects that the voltage of the right front heater sensor is outside the acceptable range. When this DTC sets, the HVAC module disables the circuit until the ignition is turned on again.

Possible Sources

Wiring, Terminals or Connectors
Heater Pad
HVAC Module

P1 CHECK HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF.

The ignition is on.

Using the scan tool, perform the HVAC module self-test.

Are there any HVAC module Diagnostic Trouble Codes (DTCs)?

Yes

For DTC B1036:11, B1036:12 or B1036:13, GO to P4.
For DTC B103A:11 or B103A:15, GO to P6.
For information on all other diagnostic trouble codes (DTCs), REFER to the HVAC Module DTC Chart.

GO to P2

P2 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE SEAT HEATER CONTROL PID (PARAMETER IDENTIFICATION)

Start the engine.

Using a diagnostic scan tool, monitor the HVAC module PID CC_SW_P_HSEATS while pressing and releasing the passenger seat heater control switch.

Does the PID change when the passenger seat heater control switch is pressed and released?

Yes

GO to P3

No	INSTALL a new HVAC module. Refer to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).

P3 CHECK THE SEAT HEATER VOLTAGE CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: HVAC Module C228B.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C228B-2 Ground

Is the voltage greater than 11 volts?

Yes

GO to P4

No	REPAIR the circuit.

P4 CHECK THE HEATING ELEMENT SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: HVAC module C228B (if not previously disconnected).

Disconnect: Right Front Seat Cushion Heater C334.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C334-1 Ground

Is there voltage present?

Yes

REPAIR the circuit. GO to P15

GO to P5

P5 CHECK THE HEATING ELEMENT SUPPLY CIRCUIT FOR AN OPEN OR A SHORT TO GROUND

Ignition OFF.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C334-1 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C334-1 C228B-17

Is the resistance greater than 10,000 ohms between the passenger seat cushion heater mat and ground, and less than 3 ohms between the passenger seat cushion heater mat and the HVAC module?

Yes

GO to P9

No	REPAIR the circuit. GO to P15

P6 CHECK THE SEAT HEATER TEMPERATURE SENSOR CIRCUIT FOR AN OPEN OR A SHORT TO GROUND

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: HVAC Module C228B.

Disconnect: Right Front Seat Cushion Heater C334.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C334-2 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C334-2 C228B-15

Is the resistance greater than 10,000 ohms between the passenger seat cushion heater mat and ground, and less than 3 ohms between the passenger seat cushion heater mat and the HVAC module?

Yes

GO to Q7

No	REPAIR the circuit. GO to P15

P7 CHECK THE SEAT HEATER TEMPERATURE SENSOR RETURN CIRCUIT FOR AN OPEN OR A SHORT TO GROUND

Disconnect: HVAC module C228A.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C334-3 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C334-3 C228A-2

Is the resistance greater than 10,000 ohms between the passenger seat cushion heater mat and ground, and less than 3 ohms between the passenger seat cushion heater mat and the HVAC module?

Yes

GO to P8

No	REPAIR the open circuit, or REFER to the Wiring Diagrams Manual to identify possible causes of the short circuit. GO to P15

P8 CHECK THE SEAT HEATER TEMPERATURE SENSOR CIRCUIT FOR A SHORT TO VOLTAGE

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C334-2 Ground

Is there voltage present?

Yes

REPAIR the circuit. GO to P15

GO to P13

P9 CHECK THE HEATING ELEMENT GROUND CIRCUIT FOR AN OPEN

Disconnect: Right Front Seat Back Heater C335.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C335-2 Ground

Is the resistance less than 0.5 Ohms?

Yes

GO to P10

No	REPAIR the circuit. GO to P15

P10 CHECK THE HEATED SEAT CUSHION FOR AN OPEN OR SHORT TO GROUND

Measure the component side resistance between:

Positive lead Measurement/Action Negative lead

C334-1, component side C334-4, component side

C334-1, component side Ground

Is the resistance between 0.6 and 2 Ohms between pins 1 and 4; and greater than 10,000 Ohms between pin 1 and ground?

Yes

GO to P11

No	INSTALL a new passenger seat cushion heater mat. REFER to: Seat Heater Mat Removal (501-10A Front Seats, General Procedures). GO to P15.

P11 CHECK THE SEAT HEATER PAD FOR AN OPEN OR A SHORT TO GROUND

Measure the component side resistance between:

Positive lead Measurement/Action Negative lead

C335-1, component side C335-2, component side

C335-2, component side Ground

Is the resistance between 0.6 and 2 Ohms between pins 1 and 2; and greater than 10,000 Ohms between pin 2 and ground?

Yes

GO to P12

No	INSTALL a new passenger seat back heater mat. REFER to: Seat Heater Mat Removal (501-10A Front Seats, General Procedures). GO to P15.

P12 CHECK THE CIRCUIT BETWEEN THE SEAT CUSHION HEATER PAD AND THE SEAT BACK HEATER PAD FOR AN OPEN AND A SHORT TO GROUND

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C334-4 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C334-4 C335-1

Is the resistance greater than 10,000 ohms between the passenger seat cushion heater mat and ground, and less than 3 ohms between the passenger seat cushion heater mat and the passenger seat back heater mat?

Yes

GO to P14

No	REPAIR the circuit. GO to P15

P13 CHECK THE SEAT HEATER TEMPERATURE SENSOR FOR AN OPEN OR A SHORT TO GROUND

Measure the component side resistance between:

Positive lead Measurement/Action Negative lead

C334-2, component side C334-3, component side

C334-2, component side Ground

Is the resistance between 300 and 300,000 Ohms between pins 2 and 3; and greater than 10,000 Ohms between pin 2 and ground?

Yes

GO to P14

No	INSTALL a new driver seat cushion heater pad. REFER TO: Seat Heater Pad Removal (Front Seats 501-10A, General Procedures). GO to P15

P14 CHECK HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE OPERATION

Ignition OFF.

Disconnect and inspect all HVAC module connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Connect the HVAC module connectors. Make sure they are fully seated and locked.

NOTE: Do not connect the passenger side air bag module C3309 at this time. Connect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service information: TSB, GSB, SSM or FSA. If a service procedure exists for this concern, STOP this test and FOLLOW the service procedure. If no service information applies, INSTALL a new HVAC module.
REFER to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).
GO to P15.

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal concerns. GO to P15

P15 CHECK SRS (SUPPLEMENTAL RESTRAINT SYSTEM) VERIFICATION SUCCESSFUL

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Passenger Side Air Bag C3309.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST Q: BOTH HEATED SEATS INOPERATIVE – WITH HEATED/VENTILATED SEATS

REFER TO the Wiring Diagrams, Cell 119, for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

Possible Sources

Fuse
Wiring, Terminals or Connectors
HVAC Module
SCME

Visual Inspection and Pre-checks

Make sure that fuse BJB 38 (30 A) is serviceable.

Q1 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE SEAT HEATER CONTROL SWITCH PARAMETER IDENTIFICATION (PIDS)

Start the engine.

Using a diagnostic scan tool, monitor the Parameter Identification (PID) while pressing and releasing the driver and passenger seat heater control switches.
- Access the HVAC module and monitor the CC_SW_D_HSEATS PID
- Access the HVAC and monitor the CC_SW_P_HSEATS PID

Do the parameter identifications (PIDs) change when the driver and passenger seat heater control switches are pressed and released?

Yes

GO to Q2

No	INSTALL a new HVAC module. Refer to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).

Q2 CHECK THE SCME (SEAT CLIMATE MODULE FRONT) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF.

The ignition is on.

Using a diagnostic scan tool, perform the SCME self-test.

Are there any SCME diagnostic trouble codes (DTCs)?

Yes

REFER to the SCME DTC Chart in this section.

GO to Q3

Q3 CHECK THE SEAT HEATER VOLTAGE CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: DSM C341C.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341C-3 Ground

Is the voltage greater than 11 volts?

Yes

GO to Q4

No	CHECK the BDJB fuse 38 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams Manual to determine possible causes of the short circuit.

Q4 CHECK THE SCME (SEAT CLIMATE MODULE FRONT) OPERATION

Ignition OFF.

Disconnect and inspect all SCME connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the SCME connectors. Make sure they are fully seated and locked.

Connect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service information: TSB, GSB, SSM or FSA. If a service procedure exists for this concern, STOP this test and FOLLOW the service procedure. If no service information applies, INSTALL a new SCME.
REFER to: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

DIAGNOSTIC PINPOINT TEST R: DRIVER HEATED SEAT INOPERATIVE – WITH HEATED/VENTILATED SEATS

REFER TO the Wiring Diagrams, Cell 119, for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCME B1153:4B	Driver Seat Cushion: Overheated	Set when the SCME detects that the left front cushion temperature exceeds 110 °C for more than 4 seconds. When this DTC sets, the SCME disables the circuit until the ignition is turned off.
SCME B1208:11	Driver Seat Cushion Temperature Sensor: Short to Ground	Set when the SCME detects that the voltage of the left front heater sensor is outside the acceptable range. When this DTC sets, the SCME disables the circuit until the ignition is turned off.
SCME B1208:15	Driver Seat Cushion Temperature Sensor: Short to Battery or Open Circuit	Set when the SCME detects that the voltage of the left front heater sensor is outside the acceptable range. When this DTC sets, the SCME disables the circuit until the ignition is turned off.
SCME B1208:2A	Driver Seat Cushion Temperature Sensor: Stuck in Range	Set when the SCME detects that the voltage of the left front heater sensor is stuck within the acceptable range. When this DTC sets, the SCME disables the circuit until the ignition is turned off.
SCME B14B9:11	Driver Seat Cushion Thermoelectric Device: Short to Ground	Set when the SCME detects that the current draw of the left front heater element exceeds the specified threshold. When this DTC sets, the SCME disables the circuit until the ignition is turned off.
SCME B14B9:12	Driver Seat Cushion Thermoelectric Device: Short to Battery	Set when the SCME detects that the voltage in the left front heater circuit exceeds the specified threshold while the driver is active. When this DTC sets, the SCME disables the circuit until the ignition is turned off.
SCME B14B9:13	Driver Seat Cushion Thermoelectric Device: Open Circuit	Set when the SCME detects that the current draw of the left front heater element is below the specified threshold. When this DTC sets, the SCME disables the circuit until the ignition is turned off.

Possible Sources

Wiring, Terminals or Connectors
Heater Pad
HVAC Module
SCME

R1 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE SEAT HEATER CONTROL PID (PARAMETER IDENTIFICATION)

Start the engine.

Using a diagnostic scan tool, monitor the HVAC module PID CC_SW_D_HSEATS while pressing and releasing the driver seat heater control switch.

Did the PID change when the driver seat heater control switch was pressed and released?

Yes

GO to R2

No	INSTALL a new HVAC module. Refer to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).

R2 CHECK THE SCME (SEAT CLIMATE MODULE FRONT) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF.

The ignition is on.

Using a diagnostic scan tool, perform the SCME self-test.

Are there any SCME diagnostic trouble codes (DTCs)?

Yes

For DTC B1153:4B, B1208:11, B1208:15 or B1208:2A, GO to R6.
For DTC B14B9:11, B14B9:12 or B14B9:13, GO to R3.
For information on all other diagnostic trouble codes (DTCs), REFER to the SCME DTC Chart.

GO to R3

R3 CHECK THE SEAT HEATER VOLTAGE SUPPLY CIRCUITS FOR AN OPEN

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: DSM C341C.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341C-3 Ground

Is the voltage greater than 11 volts?

Yes

GO to R4

No	REPAIR the faulty circuit. GO to R15.

R4 CHECK THE HEATER ELEMENT SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag Module C3333 (if not previously disconnected).

Disconnect: DSM C341D and C341E.

Disconnect: Left Front Seat Cushion Heater C3298.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3298-1 Ground

Is there voltage present?

Yes

REPAIR the circuit. GO to R15.

GO to R5

R5 CHECK THE HEATER ELEMENT SUPPLY CIRCUIT FOR AN OPEN OR SHORT TO GROUND

Ignition OFF.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3298-1 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3298-1 C341D-3

Is the resistance greater than 10,000 ohms between the driver seat cushion heater mat and ground, and less than 3 ohms between the driver seat cushion heater mat and the DSM?

Yes

GO to R9

No	REPAIR the faulty circuit. GO to R15.

R6 CHECK THE HEATED SEAT TEMPERATURE SENSOR CIRCUIT FOR AN OPEN OR SHORT TO GROUND

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: DSM C341D and C341E.

Disconnect: Left Front Seat Cushion Heater C3298.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3298-2 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3298-2 C341E-9

Is the resistance greater than 10,000 ohms between the driver seat cushion heater mat and ground; and less than 3 ohms between the driver seat cushion heater mat and the DSM?

Yes

GO to R7

No	REPAIR the circuit. GO to R15.

R7 CHECK THE SEAT TEMPERATURE SENSOR RETURN CIRCUIT FOR AN OPEN OR A SHORT TO GROUND

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3298-3 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3298-3 C341E-10

Is the resistance greater than 10,000 ohms between the driver seat cushion heater mat and ground; and less than 3 ohms between the driver seat cushion heater mat and the DSM?

Yes

GO to R8

No	REPAIR the open circuit or REFER to the Wiring Diagrams Manual to identify possible causes of the short circuit. GO to R15

R8 CHECK THE HEATED SEAT TEMPERATURE SENSOR CIRCUIT FOR A SHORT TO VOLTAGE

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3298-2 Ground

Is there voltage present?

Yes

REPAIR the circuit. GO to R15.

GO to R13

R9 CHECK THE HEATER ELEMENT GROUND CIRCUIT FOR AN OPEN

Disconnect: Left Front Seat Back Heater C3651.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3651-2 C341D-2

Is the resistance less than 3 ohms?

Yes

GO to R10

No	REPAIR the faulty circuit. GO to R15.

R10 CHECK THE HEATED SEAT PAD FOR AN OPEN OR A SHORT TO GROUND

Measure the component side resistance between:

Positive lead Measurement/Action Negative lead

C3298-1, component side C3298-4, component side

C3298-1, component side Ground

Is the resistance between 0.6 and 2 Ohms between pins 1 and 4; and greater than 10,000 Ohms between pin 1 and ground?

Yes

GO to R11

No	INSTALL a new driver seat cushion heater mat. REFER to: Seat Heater Mat Removal and Installation (501-10A Front Seats, General Procedures). GO to R15

R11 CHECK THE HEATED SEAT PAD FOR AN OPEN OR A SHORT TO GROUND

Measure the component side resistance between:

Positive lead Measurement/Action Negative lead

C3651-1, component side C3651-2, component side

C3651-2, component side Ground

Is the resistance between 0.6 and 2 Ohms between pins 1 and 2; and greater than 10,000 Ohms between pin 2 and ground?

Yes

GO to R12

No	INSTALL a new driver seat back heater mat. REFER to: Seat Heater Mat Removal and Installation (501-10A Front Seats, General Procedures). GO to R15

R12 CHECK THE CIRCUIT BETWEEN THE SEAT CUSHION HEATER MAT AND THE SEAT BACK HEATER MAT FOR AN OPEN OR A SHORT TO GROUND

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3298-4 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3298-4 C3651-1

Is the resistance greater than 10,000 Ohms between the driver seat cushion heater pad and ground, and less than 3 Ohms between the driver seat cushion heater pad and the seat back heater pad?

Yes

GO to R14

No	REPAIR the circuit. GO to R15.

R13 CHECK THE HEATED SEAT TEMPERATURE SENSOR FOR AN OPEN OR A SHORT TO GROUND

Measure the component side resistance between:

Positive lead Measurement/Action Negative lead

C3298-2, component side C3298-3, component side

C3298-2, component side Ground

Is the resistance between 300 and 300,000 Ohms between pins 2 and 3; and greater than 10,000 Ohms between pin 2 and ground?

Yes

GO to R14

No	INSTALL a new driver seat cushion heater mat. REFER to: Seat Heater Mat Removal and Installation (501-10A Front Seats, General Procedures). GO to R15

R14 CHECK THE SCME (SEAT CLIMATE MODULE ELECTRONIC) OPERATION

Ignition OFF.

Disconnect and inspect all DSM connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the DSM connectors. Make sure they are fully seated and locked.

NOTE: Do not connect the driver side airbag module C3333 at this time. Connect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles apply, INSTALL a new SCME.
REFER to: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).
GO to R15

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal concerns. GO to R15

R15 SRS (SUPPLEMENTAL RESTRAINT SYSTEM) CHECK SUCCESSFULLY VERIFIED

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Driver Side Air Bag C3333.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST: PASSENGER HEATED/VENTILATED SEAT INOPERATIVE

REFER TO the Wiring Diagrams, Cell 119, for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCME B1151:4B	Passenger Seat Cushion: Overheated	Sets when the SCME determines that the right front airbag temperature exceeds 110 °C for more than 4 seconds. When this DTC is set, the SCME disables the circuit until the ignition is turned off.
SCME B120A:11	Passenger Seat Cushion Temperature Sensor: Short to Ground	Sets when the SCME determines that the voltage of the right front heater sensor is outside the low limit. When this DTC is set, the SCME disables the circuit until the ignition is turned off.
SCME B120A:15	Passenger Seat Cushion Temperature Sensor: Short to Battery or Open Circuit	Sets when the SCME determines that the voltage of the right front heater sensor is outside the high limit. When this DTC is set, the SCME disables the circuit until the ignition is turned off.
SCME B120A:2A	Passenger Seat Cushion Temperature Sensor: Stuck in Range	Sets when the SCME detects that the voltage of the right front heater sensor is stuck within the acceptable range. When this DTC is set, the SCME disables the circuit until the ignition is turned off.
SCME B14BB:11	Passenger Seat Cushion Thermoelectric Device: Short to Ground	Sets when the SCME determines that the current draw of the right front heater element has exceeded the specified threshold. When this DTC is set, the SCME disables the circuit until the ignition is turned off.
SCME B14BB:12	Passenger Seat Cushion Thermoelectric Device: Short to Battery	Sets when the SCME determines that the voltage in the right front heater circuit exceeds the specified threshold while the driver is active. When this DTC is set, the SCME disables the circuit until the ignition is turned off.
SCME B14BB:13	Passenger Seat Cushion Thermoelectric Device: Open Circuit	Sets when the SCME determines that the current draw of the right front heater element is below the specified threshold. When this DTC is set, the SCME disables the circuit until the ignition is turned off.

Possible Sources

Wiring, Terminals or Connectors
Heater Pad
HVAC Module
SCME

S1 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) SEAT HEATER CONTROL MODULE (PARAMETER IDENTIFICATION)

Start the engine.

Using a diagnostic scan tool, monitor the HVAC module PID CC_SW_P_HSEATS while pressing and releasing the passenger seat heater control switch.

Does the PID change when the passenger seat heater control switch is pressed and released?

Yes

GO to S2

No	INSTALL a new HVAC module. Refer to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).

S2 CHECK THE SCME (SEAT CLIMATE MODULE ELECTRONIC) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF.

The ignition is on.

Using a diagnostic scan tool, perform the SCME self-test.

Are there any SCME diagnostic trouble codes (DTCs)?

Yes

For DTC B1151:4B, B120A:01, B120A:11, B120A:15 or B120A:2A, GO to S6.
For DTC B14BB:11, B14BB:12 or B14BB:13, GO to S3.
For information on all other diagnostic trouble codes (DTCs), REFER to the SCME DTC Chart.

GO to S3

S3 CHECK THE HEATED SEAT VOLTAGE SUPPLY CIRCUITS FOR AN OPEN

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: DSM C341C.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341C-3 Ground

Is the voltage greater than 11 volts?

Yes

GO to S4

No	REPAIR the faulty circuit. GO to S15

S4 CHECK THE HEATER ELEMENT SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag Module C3333 (if not previously disconnected).

Disconnect: Passenger Side Air Bag C3309.

Disconnect: DSM C341D and C341E.

Disconnect: Right Front Seat Cushion Heater C3302.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3302-1 Ground

Is there voltage present?

Yes

REPAIR the circuit. GO to S15

GO to S5

S5 CHECK THE HEATER ELEMENT SUPPLY CIRCUIT FOR AN OPEN OR A SHORT TO GROUND

Ignition OFF.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3302-1 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3302-1 C341D-5

Is the resistance greater than 10,000 ohms between the passenger seat cushion heater mat and ground; and less than 3 ohms between the passenger seat cushion heater mat and the DSM?

Yes

GO to S9

No	REPAIR the faulty circuit. GO to S15

S6 CHECK THE HEATED SEAT TEMPERATURE SENSOR CIRCUIT FOR AN OPEN OR A SHORT TO GROUND

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Passenger Side Air Bag C3309.

Disconnect: DSM C341D and C341E.

Disconnect: Right Front Seat Cushion Heater C3302.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3302-2 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3302-2 C341E-7

Is the resistance greater than 10,000 ohms between the passenger seat cushion heater mat and ground, and less than 3 ohms between the passenger seat cushion heater mat and the HVAC module?

Yes

GO to S7

No	REPAIR the circuit. GO to S15

S7 CHECK THE SEAT TEMPERATURE SENSOR RETURN CIRCUIT FOR AN OPEN OR A SHORT TO GROUND

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3302-3 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3302-3 C341E-20

Is the resistance greater than 10,000 ohms between the passenger seat cushion heater mat and ground; and less than 3 ohms between the passenger seat cushion heater mat and the DSM?

Yes

GO to S8

No	REPAIR the open circuit or REFER to the Wiring Diagrams Manual to identify possible causes of the short circuit. GO to S15

S8 CHECK THE HEATED SEAT TEMPERATURE SENSOR CIRCUIT FOR A SHORT TO VOLTAGE

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3302-2 Ground

Is there voltage present?

Yes

REPAIR the circuit. GO to S15

GO to S13

S9 CHECK THE HEATER ELEMENT GROUND CIRCUIT FOR AN OPEN

Disconnect: Right Front Seat Back Heater C3316.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3316-2 C341D-4

Is the resistance less than 3 ohms?

Yes

GO to S10

No	REPAIR the faulty circuit. GO to S15

S10 CHECK THE HEATED SEAT PAD FOR AN OPEN OR A SHORT TO GROUND

Measure the component side resistance between:

Positive lead Measurement/Action Negative lead

C3302-1, component side C3302-4, component side

C3302-1, component side Ground

Is the resistance between 0.6 and 2 Ohms between pins 1 and 4; and greater than 10,000 Ohms between pin 1 and ground?

Yes

GO to S11

No	INSTALL a new passenger seat cushion heater mat. REFER TO: Seat Heater Mat Removal and Installation (501-10A Front Seats, General Procedures). GO to S15

S11 CHECK THE HEATED SEAT MAT FOR AN OPEN OR A SHORT TO GROUND

Measure the component side resistance between:

Positive lead Measurement/Action Negative lead

C3316-1, Component Side C3316-2, Component Side

C3316-2, Component Side Ground

Is the resistance between 0.6 and 2 Ohms between pins 1 and 2; and greater than 10,000 Ohms between pin 2 and ground?

Yes

GO to S12

No	INSTALL a new passenger seat back heater mat. REFER TO: Seat Heater Mat Removal and Installation (501-10A Front Seats, General Procedures). GO to S15

S12 CHECK THE CIRCUIT BETWEEN THE SEAT CUSHION HEATER MAT AND THE SEAT BACK HEATER MAT FOR AN OPEN AND A SHORT TO GROUND

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3302-4 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C3302-4 C3316-1

Yes

GO to S14

No	REPAIR the circuit. GO to S15

S13 CHECK THE HEATED SEAT TEMPERATURE SENSOR FOR AN OPEN OR A SHORT TO GROUND

Measure the component side resistance between:

Positive lead Measurement/Action Negative lead

C3302-2, Component Side C3302-3, Component Side

C3302-2, Component Side Ground

Is the resistance between 300 and 300,000 Ohms between pins 2 and 3; and greater than 10,000 Ohms between pin 2 and ground?

Yes

GO to S14

No	INSTALL a new passenger seat cushion heater mat. REFER TO: Seat Heater Mat Removal and Installation (501-10A Front Seats, General Procedures). GO to S15

S14 CHECK THE FRONT SEAT CLIMATE CONTROL MODULE (SCME) OPERATION

Ignition OFF.

Disconnect and inspect all DSM connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the DSM connectors. Make sure they are fully seated and locked.

NOTE: Do not connect the passenger side linear side airbag C3309 or the driver side linear side airbag C3333 at this time. Reconnect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK in OASIS for any applicable service information: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service information applies, INSTALL a new SCME.
REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).
GO to S15

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal concerns. GO to S15

S15 SRS (SUPPLEMENTAL RESTRAINT SYSTEM) CHECK SUCCESSFULLY COMPLETED

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Driver Side Air Bag C3333.

Connect: Passenger Side Air Bag C3309.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST T: BOTH HEATED/VENTILATED SEATS INOPERATIVE

REFER TO the Wiring Diagrams, Cell 119, for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

Possible Sources

Wiring, Terminals or Connectors
HVAC Module
SCME

T1 CHECK THE PASSENGER SEAT HEATER OPERATION

Start the engine.

Attempt to activate the seat heater using the HVAC module buttons.

Did the seat heater operate normally?

Yes

GO to T2

No	CHECK the non-operating seat heater. GO to Pinpoint Test Q

T2 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE SEAT VENTILATION SWITCH PARAMETER IDENTIFICATION (PID)

Using the diagnostic scan tool, monitor the Parameter Identification (PID) while pressing and releasing the driver and passenger seat ventilation control switches.
- Access the HVAC module and monitor the CC_SW_D_CL_S PID
- Access the HVAC module and monitor the CC_SW_P_CL_S PID

Do the Parameter Identification (PID) values change when the passenger and driver seat ventilation control switches are pressed and released?

Yes

GO to T3

No	INSTALL a new HVAC module. Refer to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).

T3 CHECK THE FRONT SEAT CLIMATE CONTROL MODULE (SCME) OPERATION

Ignition OFF.

Disconnect and inspect all DSM connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the DSM connectors. Make sure they are fully seated and locked.

Connect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service information: TSB, GSB, SSM or FSA. If a service procedure exists for this concern, STOP this test and FOLLOW the service procedure. If no service information applies, INSTALL a new SCME.
REFER to: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

DIAGNOSTIC PINPOINT TEST U: DRIVER HEATED/VENTILATED SEAT INOPERATIVE/INCORRECT OPERATION

REFER TO the Wiring Diagrams, Cell 119, for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCME B14BD:11	Driver Seat Cushion Fan: Short to Ground	If the driver seat cushion fan current exceeds the programmed threshold, the SCME disables the driver seat system and sets this DTC.
SCME B14BD:13	Driver Seat Cushion Fan: Open Circuit	If the driver seat cushion fan current exceeds the programmed threshold, the SCME disables the driver seat system and sets this DTC.
SCME B1562:11	Driver Seat Back Fan Speed: Short to Ground	If the driver seat back fan speed control circuit is shorted to ground, the SCME sets this DTC.
SCME B1562:12	Driver Seat Back Fan Speed: Short to Battery	If the driver seat back fan speed control circuit is shorted to battery voltage, the SCME sets this DTC.
SCME B1564:11	Driver Seat Cushion Fan Speed: Short to Ground	If the driver seat cushion fan speed control circuit is shorted to ground, the SCME sets this DTC.
SCME B1564:12	Driver Seat Cushion Fan Speed: Short to Battery	If the driver seat cushion fan speed control circuit is shorted to battery voltage, the SCME sets this DTC.

Possible Sources

Wiring, Terminals or Connectors
Cushion Fan Motor
Seat Back Fan Motor
HVAC Module
SCME

U1 CHECK THE DRIVER SEAT HEATER OPERATION

Start the engine.

Attempt to activate the driver seat heater using the HVAC module buttons.

Does the driver seat heater operate correctly?

Yes

GO to U2

No	CHECK the non-operating driver seat heater. GO to Pinpoint Test R

U2 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE SEAT VENTILATION SWITCH PARAMETER IDENTIFICATION (PID)

Using the diagnostic scan tool, monitor the HVAC module CC_SW_D_CL_S PID while pressing and releasing the driver seat ventilation control switch.

Does the PID change when the driver seat ventilation control switch is pressed and released?

Yes

GO to U4

No	INSTALL a new HVAC module. Refer to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).

U3 CHECK THE FAN MOTOR AND DSM (DRIVER SEAT MODULE) CONNECTIONS

Ignition OFF.

Disconnect and inspect all DSM connectors.

Disconnect: Front Left Seat Cushion Fan Motor C3327.

Disconnect: Front Left Seat Back Fan Motor C3033.

Inspect the DSM, front seat cushion fan motor and front seat back fan motor connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Connect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

GO to U4

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

U4 CHECK THE FAN MOTOR CIRCUITS FOR A SHORT TO BATTERY VOLTAGE

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: DSM C341D and C341E.

Disconnect: Front Left Seat Cushion Fan Motor C3327.

Disconnect: Front Left Seat Back Fan Motor C3033.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341D-14 Ground

C341D-16 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341E-18 Ground

C341E-19 Ground

Is there voltage present?

Yes

REPAIR the faulty circuit. GO to U9

GO to U5

U5 CHECK THE FAN MOTOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341D-14 Ground

C341D-16 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341E-18 Ground

C341E-19 Ground

Is the resistance greater than 10000 ohms?

Yes

GO to U6

No	REPAIR the faulty circuit. GO to U9

U6 CHECK THE FAN MOTOR CIRCUITS FOR AN OPEN

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341D-16 C3327-1

C341D-14 C3327-3

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341D-16 C3033-1

C341D-14 C3033-3

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341E-19 C3327-2

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341E-18 C3035-2

Is the resistance less than 3 ohms?

Yes

If only the seat back fan is not operating correctly, INSTALL a new seat back fan motor.
REFER TO: Front Seat Back Fan Motor (501-10A Front Seats, Removal and Installation).
GO to U7
If only the seat cushion fan is not operating correctly, INSTALL a new seat cushion fan motor.
REFER TO: Front Seat Cushion Fan Motor (501-10A Front Seats, Removal and Installation).
GO to U7
If both the seat cushion and seat back fan motors are not operating correctly, GO to U8.

No	REPAIR the faulty circuit. GO to U9

U7 CHECK THE FAN MOTOR OPERATION

Ignition OFF.

NOTE: Do not connect the driver side airbag module C3333 at this time. Connect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

GO to U9

U8 CHECK THE FRONT SEAT CLIMATE CONTROL MODULE (SCME) OPERATION

Ignition OFF.

Disconnect and inspect all DSM connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the DSM connectors. Make sure they are fully seated and locked.

NOTE: Do not connect the driver side airbag module C3333 at this time. Connect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this symptom, STOP this test and FOLLOW the service article instructions. If no service articles are found, INSTALL a new SCME.
REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).
GO to U9

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues. GO to U9

U9 CHECK SRS (SUPPLEMENTAL RESTRAINT SYSTEM) PROVES SUCCESSFUL

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Driver Side Air Bag C3333.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST V: PASSENGER HEATED/VENTILATED SEAT INOPERATIVE/INCORRECT OPERATION

REFER TO the Wiring Diagrams, Cell 119, for schematic and connector information.

Normal Operation and Fault Symptoms

REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCME B14C0:11	Passenger Seat Cushion Fan: Short to Ground	If the passenger seat cushion fan current exceeds the programmed threshold, the SCME disables the passenger seat system and sets this DTC.
SCME B14C0:13	Passenger Seat Cushion Fan: Open Circuit	If the passenger seat cushion fan current exceeds the programmed threshold, the SCME disables the passenger seat system and sets this DTC.
SCME B1563:11	Passenger Seat Back Fan Speed: Short to Ground	If the passenger seat back fan speed control circuit is shorted to ground, the SCME sets this DTC.
SCME B1563:12	Passenger Seat Back Fan Speed: Short to Battery	If the passenger seat back fan speed control circuit is shorted to battery voltage, the SCME sets this DTC.
SCME B1565:11	Passenger Seat Cushion Fan Speed: Short to Ground	If the passenger seat cushion fan speed control circuit is shorted to ground, the SCME sets this DTC.
SCME B1565:12	Passenger Seat Cushion Fan Speed: Short to Battery	If the passenger seat cushion fan speed control circuit is shorted to battery voltage, the SCME sets this DTC.

Possible Sources

Wiring, Terminals or Connectors
Cushion Fan Motor
Seat Back Fan Motor
HVAC Module
SCME

V1 CHECK PASSENGER SEAT HEATER OPERATION

Start the engine.

Attempt to turn on the passenger seat heater using the HVAC module buttons.

Did the passenger seat heater operate correctly?

Yes

GO to Step 2

No	CHECK the non-operating passenger seat heater. GO to Pinpoint Test S

V2 CHECK HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE PASSENGER SEAT VENTILATION SWITCH PID (PARAMETER IDENTIFICATION)

Using the diagnostic scan tool, monitor the HVAC module CC_SW_P_CL_S PID while pressing and releasing the passenger seat ventilation control switch.

Does the PID change when the passenger ventilated seat control switch is pressed and released?

Yes

GO to V3

No	INSTALL a new HVAC module. Refer to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).

V3 CHECK FAN MOTOR AND DSM (DRIVER SEAT MODULE) CONNECTIONS

Ignition OFF.

Disconnect and inspect all DSM connectors.

Disconnect: Right Front Seat Cushion Fan Motor C3328.

Disconnect: Right Front Seat Back Fan Motor C3791.

Inspect the DSM, front seat cushion fan motor and front seat back fan motor connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Connect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

GO to V4

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.

V4 CHECK FAN MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Disconnect: Driver Side Air Bag C3333.

Disconnect: Passenger Side Air Bag C3309.

Disconnect: DSM C341D and C341E.

Disconnect: Right Front Seat Cushion Fan Motor C3328.

Disconnect: Right Front Seat Back Fan Motor C3791.

The ignition is on.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341D-13 Ground

C341D-15 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341E-16 Ground

C341E-17 Ground

Is there voltage present?

Yes

REPAIR the faulty circuit. GO to V9

GO to V5

V5 CHECK FAN MOTOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341D-13 Ground

C341D-15 Ground

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341E-16 Ground

C341E-17 Ground

Is the resistance greater than 10000 ohms?

Yes

GO to V6

No	REPAIR the faulty circuit. GO to V9

V6 CHECK FAN MOTOR CIRCUITS FOR AN OPEN

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341D-15 C3328-1

C341D-13 C3328-3

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341D-15 C3791-1

C341D-13 C3791-3

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341E-16 C3791-2

Action:
Click to display the connectors

Positive lead Measurement/Action Negative lead

C341E-17 C3328-2

Is the resistance less than 3 ohms?

Yes

If only the seat back fan is not operating correctly, INSTALL a new seat back fan motor.
REFER TO: Front Seat Back Fan Motor (501-10A Front Seats, Removal and Installation).
GO to V7
If only the seat cushion fan is not operating correctly, INSTALL a new seat cushion fan motor.
REFER TO: Front Seat Cushion Fan Motor (501-10A Front Seats, Removal and Installation).
GO to V7
If both the seat cushion and seat back fan motors are not operating correctly, GO to V8.

No	REPAIR the faulty circuit. GO to V9

V7 CHECK FAN MOTOR OPERATION

Ignition OFF.

NOTE: Do not connect the driver side inflatable curtain C3333 or the passenger side inflatable curtain C3309 at this time. Reconnect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

GO to V9.

V8 CHECK SCME (SEAT CLIMATE CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all DSM connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - if necessary, install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the DSM connectors. Make sure they are fully seated and locked.

NOTE: Do not connect the driver side inflatable curtain C3333 or the passenger side inflatable curtain C3309 at this time. Reconnect all previously disconnected connectors.

The ignition is on.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

No	The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues. GO to V9

V9 CHECK SRS (SUPPLEMENTAL RESTRAINT SYSTEM) PROVES SUCCESSFUL

REFER TO: Disabling the Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, General Procedures).

Connect: Driver Side Air Bag C3333.

Connect: Passenger Side Air Bag C3309.

Connect all previously disconnected connectors.

REFER TO: Supplemental Restraint System (SRS) Reconfiguration (501-20B Supplemental Restraint System, General Procedures).

Did the SRS verification pass?

Yes

Repair is complete. RETURN the vehicle to the customer.

No	REFER TO: Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST W: DTC: U0100:00

For circuit and connector information, refer to Wiring Diagrams Cell 14.

Normal Operation and Fault Symptoms

The DSM and PCM communicate using HS-CAN1 and MS-CAN.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
DSM U0100:00	Lost Communication With ECM/PCM "A": No Sub Type Information	The DSM sets whenever it loses communication with the PCM for 5 seconds or longer while the DSM input voltage is between 10 and 15.5 volts.

Possible Sources

Communication Module
DSM
PCM

W1 VERIFY THE CUSTOMER CONCERN

The ignition is on.

Make sure the observed symptom is present.

Is the observed symptom present?

Yes

GO to W2

No	The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

W2 CHECK THE COMMUNICATION NETWORK

The ignition is on.

Using a scan tool, perform the network test.

Does the PCM pass the network test?

Yes

GO to W3

No	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

W3 RECHECK DSM (DRIVER SEAT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Using the scan tool, repeat the DSM self-test.

Is DTC U0100:00 still present?

Yes

GO to W4

No	The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

W4 CHECK DTC U0100:00 IN OTHER MODULES

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

The ignition is on.

Wait 10 seconds.

Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0100:00 set in any other modules?

Yes

Click here to access the guided routine (PCM).

Internet Explorer version 11 or later is required to perform this Pinpoint test.

No	INSTALL a new DSM. REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).

DIAGNOSTIC PINPOINT TEST X: DTC: U0140:00

For circuit and connector information, refer to Wiring Diagrams Cell 14.

Normal Operation and Fault Symptoms

The SCME and BCM communicate using MS-CAN.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCME U0140:00	Lost Communication With Body Control Module: No Sub Type Information	The SCME sets whenever it loses communication with the BCM for 5 seconds or longer while the SCME input voltage is between 10 and 15.5 volts.

Possible Sources

Communication Module
SCME
BCM

X1 VERIFY CUSTOMER CONCERN

The ignition is on.

Make sure the observed symptom is present.

Is the observed symptom present?

Yes

GO to X2

No	The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

X2 CHECK THE COMMUNICATION NETWORK

The ignition is on.

Using a scan tool, perform the network test.

Does the BCM pass the network test?

Yes

GO to X3

No	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

X3 RECHECK SCME (SEAT CLIMATE CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Using the diagnostic scan tool, repeat the SCME self-test.

Is DTC U0140:00 still present?

Yes

GO to X4

No	The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

X4 CHECK DTC U0140:00 IN OTHER MODULES

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

The ignition is on.

Wait 10 seconds.

Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0140:00 set in any other modules?

Yes

INSTALL a new BCM.
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

No	INSTALL a new SCME. REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).

DIAGNOSTIC PINPOINT TEST Y: DTC: U0257:00

For circuit and connector information, refer to Wiring Diagrams Cell 14.

Normal Operation and Fault Symptoms

The SCME and HVAC module communicate using MS-CAN.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCME U0257:00	Lost Communication With Front Controls Interface Module/Display: No Sub Type Information	The SCME sets whenever it loses communication with the HVAC module while the SCME input voltage is between 10 and 15.5 volts.

Possible Sources

Communication Module
HVAC Module
BCM

Y1 VERIFY THE CUSTOMER CONCERN

The ignition is on.

Make sure the observed symptom is present.

Is the observed symptom present?

Yes

GO to Y2

No	The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

Y2 CHECK THE COMMUNICATION NETWORK

The ignition is on.

Using a scan tool, perform the network test.

Does the HVAC module pass the network test?

Yes

GO to Y3

No	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

Y3 RECHECK SCME (SEAT CLIMATE CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Using the diagnostic scan tool, repeat the SCME self-test.

Is DTC U0257:00 still present?

Yes

GO to Y4

No	The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

Y4 CHECK DTC U0257:00 IN OTHER MODULES

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

The ignition is on.

Wait 10 seconds.

Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0140:00 set in any other modules?

Yes

INSTALL a new HVAC module.
Refer to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).

No	INSTALL a new SCME. REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).

DIAGNOSTIC PINPOINT TEST Z: DTC: U0140:00

For circuit and connector information, refer to Wiring Diagrams Cell 14.

Normal Operation and Fault Symptoms

SCMG and SCMH communicate with the BCM via MS-CAN.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCMG U0140:00	Lost Communication With Body Control Module: No Sub Type Information	SCMG sets when communication with the BCM is lost for 5 seconds or longer while the SCMG input voltage is between 10 and 15.5 volts.
SCMH U0140:00	Lost Communication With Body Control Module: No Sub Type Information	SCMH sets whenever it loses communication with the BCM for 5 seconds or longer while the SCMH input voltage is between 10 and 15.5 volts.

Possible Sources

Communication Module
SCMG/ SCMH
BCM

Z1 CONFIRM THE CUSTOMER CONCERN

The ignition is on.

Make sure the observed symptom is present.

Is the observed symptom present?

Yes

GO to Z2

No	The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

Z2 CHECK THE COMMUNICATION NETWORK

The ignition is on.

Using a scan tool, perform the network test.

Does the BCM pass the network test?

Yes

GO to Z3

No	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

Z3 RECHECK THE SCMG (DRIVER MULTI-CONTOUR SEAT MODULE) / SCMH (PASSENGER MULTI-CONTOUR SEAT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Using the diagnostic scan tool, repeat the SCMG/SCMH self-test.

Is DTC U0140:00 still present?

Yes

GO to Z4

No	The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

Z4 CHECK FOR DTC U0140:00 IN OTHER MODULES

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

The ignition is on.

Wait 10 seconds.

Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0140:00 set in any other modules?

Yes

INSTALL a new BCM.
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

No	INSTALL a new SCMG or SCMH. Refer to: Driver Multi-Contour Seat Module [SCMG] (501-10A Front Seats, Removal and Installation).

DIAGNOSTIC PINPOINT TEST AA: DTC: U0208:00

For circuit and connector information, refer to Wiring Diagrams Cell 14.

Normal Operation and Fault Symptoms

SCMG/SCMH and DSM communicate via MS-CAN.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCMG U0208:00	"Seat Control Module A" Lost Communication: No Sub Type Information	SCMG sets when communication with the DSM is lost for 5 seconds or longer while the SCMG input voltage is between 10 and 15.5 volts.
SCMH U0208:00	"Seat Control Module A" Lost Communication: No Sub Type Information	SCMH sets whenever it loses communication with the DSM for 5 seconds or longer while the SCMH input voltage is between 10 and 15.5 volts.

Possible Sources

Communication Module
SCMG/ SCMH
DSM

AA1 CONFIRM THE CUSTOMER CONCERN

The ignition is on.

Make sure the observed symptom is present.

Is the observed symptom present?

Yes

GO to AA2

No	The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

AA2 CHECK THE COMMUNICATION NETWORK

The ignition is on.

Using a scan tool, perform the network test.

Does the DSM pass the network test?

Yes

GO to AA3

No	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

AA3 RECHECK THE SCMG (DRIVER MULTI-CONTOUR SEAT MODULE) / SCMH (PASSENGER MULTI-CONTOUR SEAT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Using the diagnostic scan tool, repeat the SCMG/SCMH self-test.

Is DTC U0208:00 still present?

Yes

GO to AA4

No	The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

AA4 CHECK FOR DTC U0208:00 IN OTHER MODULES

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

The ignition is on.

Wait 10 seconds.

Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0208:00 set in other modules?

Yes

INSTALL a new DSM.
REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).

No	INSTALL a new SCMG or SCMH. Refer to: Driver Multi-Contour Seat Module [SCMG] (501-10A Front Seats, Removal and Installation).

DIAGNOSTIC PINPOINT TEST AB: DTC: U024B:00

For circuit and connector information, refer to Wiring Diagrams Cell 14.

Normal Operation and Fault Symptoms

SCMH communicates with the SCMG via CAN.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCMH U024B:00	Communication Lost with Seat Control Module "G": No Subtype Information	SCMH sets when communication with the SCMG is lost for 5 seconds or longer while the SCMH input voltage is between 10 and 15.5 volts.

Possible Sources

Communication Module
SCMG
SCMG

AB1 CONFIRM THE CUSTOMER CONCERN

The ignition is on.

Make sure the observed symptom is present.

Is the observed symptom present?

Yes

GO to AB2

No	The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

AB2 CHECK THE COMMUNICATION NETWORK

The ignition is on.

Using a scan tool, perform the network test.

Does the SCMG pass the network test?

Yes

GO to AB3

No	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

AB3 RECHECK THE SCMH (PASSENGER MULTI-CONTOUR SEAT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Using the diagnostic scan tool, repeat the SCMH self-test.

Is DTC U024B:00 still present?

Yes

GO to AB4

No	The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

AB4 CHECK FOR DTC U024B:00 IN OTHER MODULES

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

The ignition is on.

Wait 10 seconds.

Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U024B:00 set in other modules?

Yes

INSTALL a new SCMG.
Refer to: Driver Multi-Contour Seat Module [SCMG] (501-10A Front Seats, Removal and Installation).

No	INSTALL a new SCMH. Refer to: Driver Multi-Contour Seat Module [SCMG] (501-10A Front Seats, Removal and Installation).

DIAGNOSTIC PINPOINT TEST AC: DTC: U0253:00

For circuit and connector information, refer to Wiring Diagrams Cell 14.

Normal Operation and Fault Symptoms

SCMG and SCMH communicate with the APIM via CAN.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCMG U0253:00	Lost Communication with Auxiliary Protocol Interface Module: No Sub Type Information	SCMG sets when communication with the APIM is lost for 5 seconds or longer while the SCMG input voltage is between 10 and 15.5 volts.
SCMH U0253:00	Lost Communication with Auxiliary Protocol Interface Module: No Sub Type Information	SCMH sets when communication with the APIM is lost for 5 seconds or longer while the SCMH input voltage is between 10 and 15.5 volts.

Possible Sources

Communication Module
SCMG/ SCMH
APIM

AC1 CONFIRM THE CUSTOMER CONCERN

The ignition is on.

Make sure the observed symptom is present.

Is the observed symptom present?

Yes

GO to AC2

No	The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

AC2 CHECK THE NETWORK COMMUNICATION

The ignition is on.

Using a scan tool, perform the network test.

Does the APIM pass the network test?

Yes

GO to AC3

No	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

AC3 RECHECK THE SCMG (DRIVER MULTI-CONTOUR SEAT MODULE) / SCMH (PASSENGER MULTI-CONTOUR SEAT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Using the diagnostic scan tool, repeat the SCMG/SCMH self-test.

Is DTC U0253:00 still present?

Yes

GO to AC4

No	The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

AC4 CHECK FOR DTC U0253:00 IN OTHER MODULES

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

The ignition is on.

Wait 10 seconds.

Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0253:00 set in any other modules?

Yes

INSTALL a new APIM. Refer to the appropriate section in Group 415.

No	INSTALL a new SCMG or SCMH. Refer to: Driver Multi-Contour Seat Module [SCMG] (501-10A Front Seats, Removal and Installation).

DIAGNOSTIC PINPOINT TEST ANNOUNCEMENT: DTC: U0256:00

For circuit and connector information, refer to Wiring Diagrams Cell 14.

Normal Operation and Fault Symptoms

SCMG and SCMH communicate with the HVAC module via CAN bus.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCMG U0256:00	Lost communication with the Front Controls Interface Module "A": no sub-type information	SCMG sets when communication with the HVAC module is lost for 5 seconds or longer while the SCMG input voltage is between 10 and 15.5 volts.
SCMH U0256:00	Lost communication with the Front Controls Interface Module "A": no sub-type information	SCMH sets when communication with the HVAC module is lost for 5 seconds or longer while the SCMH input voltage is between 10 and 15.5 volts.

Possible Sources

Communication Module
SCMG/ SCMH
HVAC Module

AD1 CONFIRM CUSTOMER CONCERN

The ignition is on.

Make sure the observed symptom is present.

Is the observed symptom present?

Yes

GO to AD2

No	The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

AD2 CHECK COMMUNICATION NETWORK

The ignition is on.

Using a scan tool, perform the network test.

Does the HVAC module pass the network test?

Yes

GO to AD3

No	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

AD3 RECHECK THE SCMG (DRIVER MULTI-CONTOUR SEAT MODULE) / SCMH (PASSENGER MULTI-CONTOUR SEAT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Using the diagnostic scan tool, repeat the SCMG/SCMH self-test.

Is DTC U0256:00 still present?

Yes

GO to AD4

No	The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

AD4 CHECK FOR DTC U0256:00 IN OTHER MODULES

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

The ignition is on.

Wait 10 seconds.

Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0256:00 set in other modules?

Yes

INSTALL a new HVAC module.
Refer to: Heating, Ventilation and Air Conditioning (HVAC) Module (412-00 Climate Control System - General Information, Removal and Installation).

No	INSTALL a new SCMG or SCMH. Refer to: Driver Multi-Contour Seat Module [SCMG] (501-10A Front Seats, Removal and Installation).

DIAGNOSTIC PINPOINT TEST AE: DTC: U0422:00

For circuit and connector information, refer to Wiring Diagrams Cell 14.

Normal Operation and Fault Symptoms

SCMG and SCMH exchange data with the BCM via CAN bus.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCMG U0422:00	Incorrect Data Received from Body Control Module: No Sub Type Information	SCMG sets whenever it receives an unknown ignition status from the BCM.
SCMH U0422:00	Incorrect Data Received from Body Control Module: No Sub Type Information	SCMH sets whenever it receives an unknown ignition status from the BCM.

Possible Sources

Communication Module
SCMG/ SCMH
BCM

AE1 CONFIRM THE CUSTOMER CONCERN

The ignition is on.

Make sure the observed symptom is present.

Is the observed symptom present?

Yes

GO to AE2

No	The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

AE2 CHECK COMMUNICATION NETWORK

The ignition is on.

Using a scan tool, perform the network test.

Does the BCM pass the network test?

Yes

GO to AE3

No	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

AE3 RECHECK THE SCMG (DRIVER MULTI-CONTOUR SEAT MODULE) / SCMH (PASSENGER MULTI-CONTOUR SEAT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Using the diagnostic scan tool, repeat the SCMG/SCMH self-test.

Is DTC U0422:00 still present?

Yes

GO to AE4.

No	The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

AE4 CHECK FOR DTC U0422:00 IN OTHER MODULES

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

The ignition is on.

Wait 10 seconds.

Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0422:00 set in other modules?

Yes

INSTALL a new BCM.
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

No	INSTALL a new SCMG or SCMH. Refer to: Driver Multi-Contour Seat Module [SCMG] (501-10A Front Seats, Removal and Installation).

DIAGNOSTIC PINPOINT TEST AF: DTC: U0455:00

For circuit and connector information, refer to Wiring Diagrams Cell 14.

Normal Operation and Fault Symptoms

SCMG and SCMH exchange data with the OCSM via CAN bus.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCMG U0455:00	Invalid data received from the Occupant Classification System Module "A": no sub-type information	SCMG sets whenever it receives an invalid status from the OCSM.
SCMH U0455:00	Invalid data received from the Occupant Classification System Module "A": no sub-type information	SCMH sets whenever it receives an invalid status from the OCSM.

Possible Sources

Communication Module
SCMG/ SCMH
OCSM

AF1 CONFIRM THE CUSTOMER CONCERN

The ignition is on.

Make sure the observed symptom is present.

Is the observed symptom present?

Yes

GO to AF2.

No	The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

AF2 CHECK THE COMMUNICATION NETWORK

The ignition is on.

Using a scan tool, perform the network test.

Does the OCSM pass the network test?

Yes

GO to AF3.

No	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

AF3 RECHECK THE SCMG (DRIVER MULTI-CONTOUR SEAT MODULE) / SCMH (PASSENGER MULTI-CONTOUR SEAT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Using the diagnostic scan tool, repeat the SCMG/SCMH self-test.

Is DTC U0455:00 still present?

Yes

GO to AF4

No	The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

AF4 CHECK FOR DTC U0455:00 IN OTHER MODULES

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

The ignition is on.

Wait 10 seconds.

Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0455:00 set in other modules?

Yes

INSTALL a new OCSM.
Refer to: Occupant Classification System (OCS) Sensor - Vehicles With: Multi-Contour Seats (501-20B Supplemental Restraint System, Removal and Installation).

No	INSTALL a new SCMG or SCMH. Refer to: Driver Multi-Contour Seat Module [SCMG] (501-10A Front Seats, Removal and Installation).

PINPOINT TEST AG : DTC: U0199:00

For circuit and connector information, refer to Wiring Diagrams Cell 14.

Normal Operation and Fault Symptoms

DSM communicates with the DDM via CAN bus.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
DSM U0199:00	Lost Communication with Door A Control Module: No Sub Type Information	DSM sets whenever it loses communication with the DDM module for 5 seconds or longer while the DSM input voltage is between 10 and 15.5 volts.

Possible Sources

Communication Module
DSM
DDM

AG1 CONFIRM THE CUSTOMER CONCERN

The ignition is on.

Make sure the observed symptom is present.

Is the observed symptom present?

Yes

GO to AG2

No	The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

AG2 CHECK THE COMMUNICATION NETWORK

The ignition is on.

Using a scan tool, perform the network test.

Does the DDM pass the network test?

Yes

GO to AG3

No	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

AG3 RECHECK THE DSM (DRIVER FRONT SEAT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Using the scan tool, repeat the DSM self-test.

Is DTC U0199:00 still present?

Yes

GO to AG4

No	The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

AG4 CHECK FOR DTC U0199:00 IN OTHER MODULES

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

The ignition is on.

Wait 10 seconds.

Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0199:00 set in other modules?

Yes

INSTALL a new DDM.
REFER TO: Driver Door Module (DDM) (419-10 Multifunction Electronic Modules, Removal and Installation).

No	INSTALL a new DSM. REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).

DIAGNOSTIC PINPOINT TEST AH: DTC: U0253:00

For circuit and connector information, refer to Wiring Diagrams Cell 14.

Normal Operation and Fault Symptoms

The DSM communicates with the APIM over the CAN bus.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
DSM U0253:00	Lost Communication with Auxiliary Protocol Interface Module: No Sub Type Information	The DSM sets when communication with the APIM is lost for 5 seconds or longer, while the DSM input voltage is between 10 and 15.5 volts.

Possible Sources

Communication Module
DSM
APIM

AH1 VERIFY THE CUSTOMER CONCERN

The ignition is on.

Make sure the observed symptom is present.

Is the observed symptom present?

Yes

GO to AH2

No	The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.

AH2 CHECK THE COMMUNICATION NETWORK

The ignition is on.

Using a scan tool, perform the network test.

Does the APIM pass the network test?

Yes

GO to AH3

No	REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).

AH3 RECHECK THE DSM (DRIVER FRONT SEAT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Using the scan tool, repeat the DSM self-test.

Is DTC U0253:00 still present?

Yes

GO to AH4

No	The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.

AH4 CHECK FOR DTC U0253:00 IN OTHER MODULES

Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Ignition OFF.

The ignition is on.

Wait 10 seconds.

Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0253:00 set in any other modules?

Yes

INSTALL a new APIM. Refer to the appropriate section in Group 415.

No	INSTALL a new DSM. REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).

DIAGNOSTIC PINPOINT TEST AI: DTC: U3500:17

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

The DSM continuously monitors the input voltage for proper operation. If the DSM detects an input voltage above 17 volts, it stores DTC U3500:17.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
DSM U3500:17	Control Module Input Power Circuit "A" Range/Performance: circuit voltage above threshold	The DSM sets whenever the DSM input voltage exceeds 17 volts. If DTC U3500:17 is set, the DSM disables the driver seat motor outputs.

Possible Sources

Battery Charging System

AI1 CHECK THE CHARGING SYSTEM VOLTAGE

Start the engine.

Measure the battery voltage with and without a load on the charging system as follows:
- Turn off all accessories and run the engine at 1500 rpm for at least 2 minutes while measuring the battery voltage.
- Turn on the headlamps and the HVAC blower to maximum and run the engine at 1500 rpm for at least 2 minutes while measuring the battery voltage.

Using a scan tool, perform the network test.

Is the voltage between 13 and 15.2 volts?

Yes

CLEAR the diagnostic trouble codes (DTCs). CHECK the system for normal operation.

No	CHECK the vehicle charging system. REFER TO: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

DIAGNOSTIC PINPOINT TEST AJ: DTC: U2100:00

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

Using the diagnostic scan tool, PERFORM a PMI on the DSM. REPEAT the self-test and CHECK for a successful PMI. CLEAR the diagnostic trouble codes (DTCs).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
DSM up to 21:00	Initial Configuration Not Complete: No Sub Type Information	This DTC indicates that the PMI was not performed on a newly installed module, or the configuration data was lost.

Possible Sources

The PMI was not performed on a newly installed module, or the configuration data was lost.

No diagnostic actions are available for this symptom or DTC. Refer to: Diagnostic Methods (100-00 General Information, Description and Operation).

DIAGNOSTIC PINPOINT TEST AK: DTC: U3000:49

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

INSTALL a new DSM. REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
DSM U3000:49	Control Module: Internal Electronic Failure	This DTC indicates an internal module fault. The module must be replaced.
SCME U3000:49	Control Module: Internal Electronic Failure	This DTC indicates an internal module fault. The module must be replaced.

Possible Sources

No diagnostic actions are available for this symptom or DTC. Refer to: Diagnostic Methods (100-00 General Information, Description and Operation).

PINPOINT TEST AL : DTC: U1000:00

REFER TO the Wiring Diagrams, Cell 119, for schematic and connector information.

Normal Operation and Fault Symptoms

FIRST CHECK any other DSM and SCME diagnostic trouble codes (DTCs). CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. If DTC U1000:00 returns, INSTALL a new DSM.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCME U1000:00	Solid State Driver Protection Active - Driver Disabled: No Sub Type Information	This DTC indicates an internal module fault. The module must be replaced.

Possible Sources

No diagnostic actions are available for this symptom or DTC. Refer to: Diagnostic Methods (100-00 General Information, Description and Operation).

DIAGNOSTIC PINPOINT TEST AM: DTC: U2100:00

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

Using the diagnostic scan tool, PERFORM a PMI on the SCME. REPEAT the self-test and CHECK for a successful PMI. CLEAR the diagnostic trouble codes (DTCs).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCME U2100:00	Initial Configuration Not Complete: No Sub Type Information	This DTC indicates that the PMI was not performed on a newly installed module, or the configuration data was lost.

Possible Sources

The PMI was not performed on a newly installed module, or the configuration data was lost.

No diagnostic actions are available for this symptom or DTC. Refer to: Diagnostic Methods (100-00 General Information, Description and Operation).

DIAGNOSTIC PINPOINT TEST AN: DTC: U1000:00

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

FIRST CHECK any other related SCMG/SCMH diagnostic trouble codes (DTCs). CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. If DTC U1000:00 returns, INSTALL a new SCMG/SCMH. REFER TO: Driver Seat Multi-Contour Module [SCMG] (501-10A Front Seats, Removal and Installation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCMG U1000:00	Solid State Driver Protection Active - Driver Disabled: No Sub Type Information	This DTC indicates an internal module fault. The module must be replaced.
SCMH U1000:00	Solid State Driver Protection Active - Driver Disabled: No Sub Type Information	This DTC indicates an internal module fault. The module must be replaced.

Possible Sources

SCMG/ SCMH

No diagnostic actions are available for this symptom or DTC. Refer to: Diagnostic Methods (100-00 General Information, Description and Operation).

DIAGNOSTIC PINPOINT TEST AO: DTC: U2100:00

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

Using the diagnostic scan tool, PERFORM a PMI on the SCMG/SCMH. REPEAT the self-test and CHECK for a successful PMI.

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCMG U2100:00	Initial Configuration Not Complete: No Sub Type Information	This DTC indicates that the PMI was not performed on a newly installed module, or the configuration data was lost.
SCMH U2100:00	Initial Configuration Not Complete: No Sub Type Information	This DTC indicates that the PMI was not performed on a newly installed module, or the configuration data was lost.

Possible Sources

The PMI was not performed on a newly installed module, or the configuration data was lost.

No diagnostic actions are available for this symptom or DTC. Refer to: Diagnostic Methods (100-00 General Information, Description and Operation).

DIAGNOSTIC PINPOINT TEST AP: DTC: U3000:49

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

INSTALL a new SCMG/SCMH. REFER TO: Driver Seat Multi-Contour Module [SCMG] (501-10A Front Seats, Removal and Installation).

DTC Fault Trigger Conditions

Trouble Code	Description	Fault Trigger Condition
SCMG U3000:49	Control Module: Internal Electronic Failure	This DTC indicates an internal module fault. The module must be replaced.
SCMH U3000:49	Control Module: Internal Electronic Failure	This DTC indicates an internal module fault. The module must be replaced.

Possible Sources

SCMG/ SCMH

No diagnostic actions are available for this symptom or DTC. Refer to: Diagnostic Methods (100-00 General Information, Description and Operation).

SYMPTOM TEST AQ: INDIVIDUAL MULTI-CONTOUR SEAT FUNCTION INOPERATIVE FROM SEAT CONTROL SWITCH – TOUCH CONTROL OPERATES CORRECTLY

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

Using the diagnostic scan tool, perform a self-test of the SCMG or SCMH. If any diagnostic trouble codes (DTCs) related to the seat control switch are present, REFER TO the SCMG or SCMH Diagnostic Trouble Code Chart. If there are no DTCs related to the seat control switch, INSTALL a new seat control switch. REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).

Possible Sources

Seat Control Switch

No diagnostic actions are available for this symptom or DTC. Refer to: Diagnostic Methods (100-00 General Information, Description and Operation).

DIAGNOSTIC PINPOINT TEST AR: MEMORY POSITION DOES NOT MOVE TO THE CORRECT MEMORY POSITION

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

PERFORM a self-test of the DSM and RETRIEVE diagnostic trouble codes (DTCs). REFER TO the DSM DTC Chart.

Possible Sources

Memory seat hard/soft stops are incorrectly installed

No diagnostic actions are available for this symptom or DTC. Refer to: Diagnostic Methods (100-00 General Information, Description and Operation).

DIAGNOSTIC PINPOINT TEST AS: MEMORY SEAT INOPERATIVE WHEN USING RKE (REMOTE KEYLESS ENTRY) TRANSMITTER

For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.

Normal Operation and Fault Symptoms

CHECK that the RKE transmitter operates correctly and is linked to the memory position. REFER TO the Owner's Literature for information on linking the RKE transmitter. PERFORM a self-test of the DSM and REFER TO the DSM DTC Chart to diagnose any retrieved diagnostic trouble codes (DTCs).

Possible Sources

RKE transmitter concern

No diagnostic actions are available for this symptom or DTC. Refer to: Diagnostic Methods (100-00 General Information, Description and Operation).

Diagnosis and Testing - Front Seats

Diagnostic Trouble Code (DTC) Chart

Diagnostic Trouble Code Chart

Symptom Chart

Symptom Chart: Front Seats

Symptom Chart

Pinpoint Test(s)

Normal Operation and Fault Symptoms

Possible Sources

Visual Inspection and Pre-checks

Normal Operation and Fault Symptoms

Possible Sources

Visual Inspection and Pre-checks

Normal Operation and Fault Symptoms

Possible Sources

Visual Inspection and Pre-checks

Normal Operation and Fault Symptoms

Possible Sources

Visual Inspection and Pre-checks

Normal Operation and Fault Symptoms

Possible Sources

Visual Inspection and Pre-checks

Normal Operation and Fault Symptoms

Possible Sources

Normal Operation and Fault Symptoms

Possible Sources

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Possible Sources

Visual Inspection and Pre-checks

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Possible Sources

Normal Operation and Fault Symptoms

Possible Sources

Visual Inspection and Pre-checks

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Possible Sources

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Possible Sources

Visual Inspection and Pre-checks

Blue lock:

Blue lock:

Orange lock:

Orange lock:

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Possible Sources

Visual Inspection and Pre-checks

Blue lock:

Blue lock:

Orange lock:

Orange lock:

Normal Operation and Fault Symptoms

Possible Sources

Visual Inspection and Pre-checks

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Possible Sources

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Possible Sources

Normal Operation and Fault Symptoms

Possible Sources

Visual Inspection and Pre-checks

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Possible Sources

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Possible Sources

Normal Operation and Fault Symptoms

Possible Sources

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions

Possible Sources

Normal Operation and Fault Symptoms

DTC Fault Trigger Conditions