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 E
DDM
B1C04:23
Memory Switch No. 2: Low Signal
GO to Pinpoint Test E
DDM
B1C05:23
Memory Switch No. 3: Low Signal
GO to Pinpoint Test E
DSM
B14C3:24
Rear Seat Height Down Switch: Stuck High Signal
GO to Pinpoint Test D
DSM
B14C4:24
Rear Seat Height Up Switch: Stuck High Signal
GO to Pinpoint Test D
DSM
B14CB:11
Rear Seat Height Feedback: Short to Ground
GO to Pinpoint Test E
DSM
B14KB: 12
Rear Seat Height Feedback: Short to Battery
GO to Pinpoint Test E
DSM
B14CE:09
Horizontal Seat Motor Power: Component Failures
GO to Pinpoint Test D
DSM
B14CE:11
Horizontal Seat Motor Output: Short to Ground
GO to Pinpoint Test D
DSM
B14CE:12
Horizontal Seat Motor Output: Short to Battery
GO to Pinpoint Test D
DSM
B14CE:14
Horizontal Seat Motor Output: Short to Ground or Open
GO to Pinpoint Test D
DSM
B14CE:15
Horizontal Seat Motor Output: Short to Battery or Open
GO to Pinpoint Test D
DSM
B14CE:1A
Horizontal Seat Motor Output: Circuit Resistance Below Threshold
GO to Pinpoint Test D
DSM
B14CE:31
Horizontal Seat Motor Power: No Signal
GO to Pinpoint Test E
DSM
B14CF:09
Recline Seat Motor Output Signal: Component Failure
GO to Pinpoint Test D
DSM
B14CF:11
Recline Seat Motor Output: Short to Ground
GO to Pinpoint Test D
DSM
B14CF:12
Recline Seat Motor Output: Short to Battery
GO to Pinpoint Test D
DSM
B14CF:14
Recline Seat Motor Output: Short to Ground or Open
GO to Pinpoint Test D
DSM
B14CF:15
Recline Seat Motor Output: Short to Battery or Open
GO to Pinpoint Test D
DSM
B14CF:1A
Recline Seat Motor Output Signal: Circuit Resistance Below Threshold
GO to Pinpoint Test D
DSM
B14CF:31
Recline Seat Motor Output Signal: No Signal
GO to Pinpoint Test E
DSM
B14D0:09
Front/Recline Seat Height Motor Power: Component Failure
GO to Pinpoint Test D
DSM
B14D0:11
Seat Height/Recline Motor Output Signal: Short to Ground
GO to Pinpoint Test D
DSM
B14D0:12
Seat Height/Recline Motor Output Signal: Short to Battery
GO to Pinpoint Test D
DSM
B14D0:14
Seat Height/Recline Motor Output Signal: Short to Ground or Open
GO to Pinpoint Test D
DSM
B14D0:15
Seat Height/Recline Motor Output Signal: Short to Battery or Open
GO to Pinpoint Test D
DSM
B14D0:1A
Front Seat Height/Recline Motor Output Signal: Circuit Resistance Below Threshold
GO to Pinpoint Test D
DSM
B14D0:31
Front Seat Height/Recline Motor Output Signal: No Signal
GO to Pinpoint Test E
DSM
B14D2:09
Rear Seat Height Motor Power: Component Failure
GO to Pinpoint Test D
DSM
B14D2:11
Rear Seat Height Motor Output: Short to Ground
GO to Pinpoint Test D
DSM
B14D2:12
Rear Seat Height Motor Output: Short to Battery
GO to Pinpoint Test D
DSM
B14D2:14
Rear Seat Height Motor Output: Short to Ground or Open
GO to Pinpoint Test D
DSM
B14D2:15
Rear Seat Height Motor Output: Short to Battery or Open
GO to Pinpoint Test D
DSM
B14D2:1A
Rear Seat Height Motor Power: Circuit Resistance Below Threshold
GO to Pinpoint Test D
DSM
B14D2:31
Rear Seat Height Motor Power: No Signal
GO to Pinpoint Test E
DSM
B1B89:11
Seat Slide Motor Speed/Position Sensor: Short to Ground
GO to Pinpoint Test E
DSM
B1B89:12
Seat Slide Motor Speed/Position Sensor: Short to Battery
GO to Pinpoint Test E
DSM
B1B91:11
Recline Seat Motor Speed/Position Sensor: Short to Ground
GO to Pinpoint Test E
DSM
B1B91:12
Recline Seat Motor Speed/Position Sensor: Short to Battery
GO to Pinpoint Test E
DSM
B1B93:11
Recline Seat Motor Speed/Position Sensor: Short to Ground
GO to Pinpoint Test E
DSM
B1B93:12
Recline Seat Motor Speed/Position Sensor: Short to Battery
GO to Pinpoint Test E
DSM
B1B96:24
Seat Slide Forward Switch: High Signal
GO to Pinpoint Test D
DSM
B1B97:24
Seat Slide Rearward Switch: Stuck High Signal
GO to Pinpoint Test D
DSM
B1B98:24
Seat Recline Up Switch: Stuck High Signal
GO to Pinpoint Test D
DSM
B1B99:24
Seat Tilt Down Switch: Signal Constantly High
GO to Pinpoint Test D
DSM
B1C00:24
Seat Recline Up Switch: Stuck High Signal
GO to Pinpoint Test D
DSM
B1C01:24
Seat Tilt Down Switch: Signal Constantly High
GO to Pinpoint Test D
DSM
U0100:00
Lost Communication With ECM/PCM "A": No Sub Type Information
GO to Pinpoint Test I
DSM
U0140:00
Lost Communication With Body Control Module: No Sub Type Information
GO to Pinpoint Test J
DSM
U0253:87
Lost Communication with Auxiliary Protocol Interface Module: No Message
GO to Pinpoint Test K
DSM
U1000:00
Solid State Driver Protection Active - Driver Disabled: No Sub Type Information
GO to Pinpoint Test L
DSM
U2100:00
Initial Configuration Not Complete: No Sub Type Information
GO to Pinpoint Test M
DSM
U3000:49
Control Module: Internal Electronic Failure
GO to Pinpoint Test N
HVAC
B1034:11
Front Left Seat Heater Element: Short to Ground
GO to Pinpoint Test P
HVAC
B1034:12
Front Left Seat Heater Element: Short to Battery
GO to Pinpoint Test P
HVAC
B1034:13
Front Left Seat Heater Element: Open Circuit
GO to Pinpoint Test P
HVAC
B1034:13
Front Left Seat Heater Element: Open Circuit
GO to Pinpoint Test P
HVAC
B1034:15
Front Left Seat Heater Element: Short to Battery or Open Circuit
GO to Pinpoint Test P
HVAC
B1036:11
Front Right Seat Heater Element: Short to Ground
GO to Pinpoint Test Q
HVAC
B1036:12
Front Right Seat Heater Element: Short to Battery
GO to Pinpoint Test Q
HVAC
B1036:13
Front Right Seat Heater Element: Open Circuit
GO to Pinpoint Test Q
HVAC
B1036:13
Front Right Seat Heater Element: Open Circuit
GO to Pinpoint Test Q
HVAC
B1036:15
Front Right Seat Heater Element: Short to Battery or Open Circuit
GO to Pinpoint Test Q
HVAC
B1038:11
Front Left Seat Heater Sensor: Short to Ground
GO to Pinpoint Test P
HVAC
B1038:15
Front Left Seat Heater Sensor: Short to Battery or Open Circuit
GO to Pinpoint Test P
HVAC
B103A: 11
Front Right Seat Heater Sensor: Short to Ground
GO to Pinpoint Test Q
HVAC
B103A: 15
Front Right Seat Heater Sensor: Short to Battery or Open Circuit
GO to Pinpoint Test Q
Global Customer Symptom Codes (GCSC) Table
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).
Symptom
Action
Comfort and Entertainment > Seats > Front Driver > Heated
GO TO Pinpoint Test O
Comfort and Entertainment > Seats > Front Driver > Heated
GO to Pinpoint Test P
Comfort and Entertainment > Seats > Front Driver > Power Function
GO to Pinpoint Test A
Comfort and Entertainment > Seats > Front Driver > Power Function
GO to Pinpoint Test C
Comfort and Entertainment > Seats > Front Driver > Power Function
GO to Pinpoint Test D
Comfort and Entertainment > Seats > Front Driver > Power Function
GO to Pinpoint Test E
Comfort and Entertainment > Seats > Front Driver > Power Function
GO to Pinpoint Test F
Comfort and Entertainment > Seats > Front Driver > Power Function
GO to Pinpoint Test G
Comfort and Entertainment > Seats > Front Driver > Power Function
GO to Pinpoint Test H
Comfort and Entertainment > Seats > Front Passenger > Heated
GO TO Pinpoint Test O
Comfort and Entertainment > Seats > Front Passenger > Heated
GO to Pinpoint Test Q
Comfort and Entertainment > Seats > Front Passenger > Power Function
GO to Pinpoint Test B
Symptom Chart
Symptom Chart: Front Seats
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).
Symptom Chart
Condition
Action
No Communication with DDM
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No Communication with DSM
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
No Communication with HVAC Module
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
Power Seat Inoperative or Operates Incorrectly - Driver, Without Memory
GO to Pinpoint Test A
Power Seat Inoperative or Operates Incorrectly - Passenger
GO to Pinpoint Test B
Power Lumbar Inoperative - Driver
GO to Pinpoint Test C
Memory Seat Does Not Operate in Horizontal/Vertical/Tilt Direction Using the Seat Control Switch.
GO to Pinpoint Test D
Memory Seat Does Not Operate Using the SET Memory Switch
GO to Pinpoint Test E
Memory Seat Moves at One-Second Intervals
GO to Pinpoint Test E
Memory Seat Does Not Move to the Correct Memory Position
GO to Pinpoint Test F
Memory Seat Does Not Operate When Using the RKE Transmitter
GO to Pinpoint Test G
Easy Entry/Easy Exit Does Not Operate or Does Not Operate Correctly
DIAGNOSTIC TEST A: POWER SEAT INOPERATIVE OR IMPROPER OPERATION - DRIVER, 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 Back
Seat Track Motor
Seat Track
Visual Inspection and Pre-checks
Make sure that fuse BJB 30 (30A) is in good condition.
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 seat recliner motor does not operate, GO to A4. If only the horizontal motor does not operate, GO to A6. If only the seat cushion tilt motor does not operate, GO to A8. If only the height motor does not operate, GO to A10.
A2 CHECK THE VOLTAGE AT THE SEAT CONTROL SWITCH
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
Disconnect: Driver Seat Switch C360.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C360-10
Ground
Is the voltage greater than 11 volts?
Yes
GO to A3
No
CHECK fuse BJB 30 (30A) is in good condition. If OK, REPAIR the circuit. If not OK, REFER TO the Wiring Diagrams Manual to determine possible causes of the short circuit. GO to A12
A3 CHECK THE SEAT SWITCH GROUND CIRCUIT
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C360-11
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 A12
No
REPAIR the circuit. GO to A12
A4 CHECK THE VOLTAGE AT THE SEAT RECLINER MOTOR
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
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 front driver seat back frame. GO to A12
No
GO to A5
A5 CHECK THE SEAT RECLINER MOTOR CIRCUITS FOR OPEN CIRCUIT
Disconnect: Driver Seat Switch C360.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C360-9
C3187-1
C360-7
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 A12
No
REPAIR the faulty circuit. GO to A12
A6 CHECK THE VOLTAGE AT THE HORIZONTAL SEAT MOTOR
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
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 motor. REFER TO: Front Seat Track Motor (501-10A Front Seats, Removal and Installation). GO to A12
No
GO to A7
A7 CHECK THE HORIZONTAL SEAT MOTOR CIRCUIT FOR OPEN CIRCUIT
Disconnect: Driver Seat Switch C360.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C360-14
C362-3
C360-15
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 A12
No
REPAIR the faulty circuit. GO to A12
A8 CHECK THE VOLTAGE AT THE SEAT CUSHION TILT MOTOR
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
Disconnect: Driver Seat Cushion Tilt Motor C383.
NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While pressing the cushion tilt switch up and down, measure: Click to display connectors
Positive lead
Measurement/Action
Negative lead
C383-1
C383-3
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 A12
No
GO to A9
A9 CHECK THE SEAT TILT MOTOR CIRCUIT FOR AN OPEN
Disconnect: Driver Seat Switch C360.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C360-16
C383-3
C360-17
C383-1
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 A12
No
REPAIR the faulty circuit. GO to A12
A10 CHECK THE VOLTAGE AT THE SEAT LIFT MOTOR
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
Disconnect: Driver Seat Height Adjustment Motor C363.
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
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 A12
No
GO to A11
A11 CHECK THE SEAT HEIGHT MOTOR CIRCUIT FOR AN OPEN
Disconnect: Driver Seat Switch C360.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C360-12
C363-3
C360-13
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 A12
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Connect: Driver Side Integrated Air Bag C3051.
Connect all previously disconnected connectors.
Reconfigure the SRS. 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 TEST B: POWER SEAT INOPERATIVE OR IMPROPER OPERATION - PASSENGER
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 Back
Seat Track Motor
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 not working, GO to B4. If only the seat recline motor is not working, GO to B6. If only the height motor is not working, GO to B8.
B2 CHECK THE VOLTAGE AT THE SEAT CONTROL SWITCH
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Passenger Side Integrated Air Bag C339.
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 B3
No
CHECK fuse BJB 31 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER TO the Electrical Circuit Diagrams to determine the possible causes of the short circuit. GO to B10
B3 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 B10
No
REPAIR the circuit. GO to B10
B4 CHECK THE VOLTAGE AT THE HORIZONTAL SEAT MOTOR
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Passenger Side Integrated Air Bag C339.
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 motor. REFER TO: Front Seat Track Motor (501-10A Front Seats, Removal and Installation). GO to B10
No
GO to B5
B5 CHECK THE HORIZONTAL SEAT MOTOR CIRCUIT FOR AN OPEN
Disconnect: Passenger Seat Control Switch C3388.
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 B10
No
REPAIR the faulty circuit. GO to B10
B6 CHECK THE VOLTAGE AT THE SEAT RECLINER MOTOR
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Passenger Side Integrated Air Bag C339.
Disconnect: Passenger Seat Recline Motor C3189.
NOTE: The measured voltage changes polarity depending on the direction the seat control switch is activated. While activating the seatback recline switch forward and backward, measure: Probe the connectors
Positive lead
Measurement/Action
Negative lead
C3189-1
C3189-3
Voltage exceeds 11 volts when the seat control switch is moved in both directions?
Yes
INSTALL a new passenger seatback frame. GO to B10
No
GO to B7
B7 CHECK THE SEAT RECLINER MOTOR CIRCUIT 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
C3388-7
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 B10
No
REPAIR the faulty circuit. GO to B10
B8 CHECK THE VOLTAGE AT THE SEAT LIFT MOTOR
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Passenger Side Integrated Air Bag C339.
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 B10
No
GO to B9
B9 CHECK THE SEAT HEIGHT MOTOR CIRCUIT FOR AN OPEN
Disconnect: Passenger Seat Control Switch C3388.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C3388-14
C330-3
C3388-15
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 B10
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Connect: Passenger Side Integrated Air Bag C339.
Connect all previously disconnected connectors.
Reconfigure the SRS. 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 TEST C: POWER LUMBAR INOPERATIVE - DRIVER
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
C1 CHECK THE VOLTAGE AT THE SEAT LUMBAR MOTOR.
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
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 support assembly. REFER TO: Front Seat Power Lumbar Support Assembly (501-10A Front Seats, Removal and Installation). GO to C3
No
GO to C2
C2 CHECK THE SEAT LUMBAR MOTOR CIRCUITS FOR AN OPEN
Disconnect: Driver Seat Switch C360.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C360-2
C3215-B
C360-6
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 C3
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 D3. For DTC B14CE:31, B14CF:31, B14D0:31 or B14D2:31 GO to Pinpoint Test E. For DTC B14CE:XX, B14CF:XX, B14D0:XX or B14D2:XX GO to D9. For all other DTCs, REFER TO the DTC Chart.
No
GO to D2
D2 CHECK THE DSM (DRIVER SEAT MODULE) SEAT CONTROL SWITCH PARAMETER IDENTIFICATION (PID)
While holding the seat control switch in each position, monitor the DSM seat control switch parameter identification (PID) using 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 D9
No
GO to D3
D3 CHECK THE SEAT CONTROL SWITCH
Ignition OFF.
Disconnect: Driver Seat Switch C360.
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 D4
No
INSTALL a new seat control switch. REFER TO: Front Seat Control Switch (501-10A Front Seats, Removal and Installation).
D4 CHECK THE VOLTAGE AT THE SEAT CONTROL SWITCH
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C360-10
Ground
Is the voltage greater than 11 volts?
Yes
GO to D5
No
REPAIR the circuit. GO to D37.
D5 CHECK THE SEAT SWITCH GROUND CIRCUIT FOR OPEN
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C360-11
Ground
Is the resistance less than 3 ohms?
Yes
GO to D6
No
REPAIR the circuit. GO to D37.
D6 CHECK THE CIRCUITS BETWEEN THE SEAT CONTROL SWITCH AND THE DSM (DRIVER SEAT MODULE) FOR A SHORT TO VOLTAGE
Disconnect: DSM C341C and C341D.
The ignition is on.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C360-17
Ground
C360-16
Ground
C360-13
Ground
C360-12
Ground
C360-14
Ground
C360-15
Ground
C360-9
Ground
C360-7
Ground
Is there voltage present?
Yes
REPAIR the faulty circuit. GO to D37.
No
GO to D7
D7 CHECK THE CIRCUITS BETWEEN THE SEAT CONTROL SWITCH AND THE DSM (DRIVER SEAT MODULE) FOR A SHORT TO GROUND
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C360-17
Ground
C360-16
Ground
C360-13
Ground
C360-12
Ground
C360-14
Ground
C360-15
Ground
C360-9
Ground
C360-7
Ground
Is the resistance greater than 10000 ohms?
Yes
GO to D8
No
REPAIR the faulty circuit. GO to D37.
D8 CHECK THE CIRCUITS BETWEEN THE SEAT CONTROL SWITCH AND THE DSM (DRIVER SEAT MODULE) FOR AN OPEN
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C360-17
C341C-7
C360-16
C341C-6
C360-13
C341C-14
C360-12
C341C-8
C360-14
C341C-16
C360-15
C341C-15
Click to display connectors
C360-9
C341D-19
C360-7
C341D-20
Is the resistance greater than 10000 ohms?
Yes
GO to D36.
No
REPAIR the faulty circuit. GO to D37.
D9 CHECK THE SEAT OPERATION
Using the seat control switch, attempt to operate the seat in the following directions:
Cushion tilt up and down
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 D10. If the front seat vertical movement does not occur, GO to D12. If the rear seat vertical movement does not occur, GO to D18. If the seat horizontal movement does not occur, GO to D24. If the seat recline does not occur, GO to D30.
D10 CHECK THE VOLTAGE AT THE DSM (DRIVER SEAT MODULE)
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
Disconnect: DSM C341A.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341A-10
Ground
Is the voltage greater than 11 volts?
Yes
GO to D11
No
REPAIR the circuit. GO to D37.
D11 CHECK THE DSM (DRIVER SEAT MODULE) GROUND CIRCUITS FOR OPEN
Disconnect: DSM C341B.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-7
Ground
C341B-8
Ground
C341B-9
Ground
Is the resistance less than 3 ohms?
Yes
GO to D36.
No
REPAIR the faulty circuit. GO to D37.
D12 CHECK THE CUSHION TILT MOTOR CIRCUITS FOR A SHORT TO VOLTAGE
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
Disconnect: DSM C341B and C341C.
The ignition is on.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-10
Ground
Click to display connectors
Positive lead
Measurement/Action
Negative lead
C341C-1
Ground
Is there voltage present?
Yes
GO to D13
No
GO to D14
D13 CHECK THE CUSHION TILT MOTOR CIRCUITS FOR A SHORT TO VOLTAGE WITH THE ENGINE OFF
Ignition OFF.
Disconnect: Driver Seat Cushion Tilt Motor C383.
The ignition is on.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-10
Ground
Click to display connectors
Positive lead
Measurement/Action
Negative lead
C341C-1
Ground
Is there voltage present?
Yes
REPAIR the faulty circuit. GO to D37.
No
INSTALL a new driver seat track. REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation). GO to D37.
D14 CHECK THE CUSHION TILT MOTOR CIRCUITS FOR A SHORT TO GROUND
Ignition OFF.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-10
Ground
Click to display connectors
Positive lead
Measurement/Action
Negative lead
C341C-1
Ground
Is the resistance greater than 10000 ohms?
Yes
GO to D16
No
GO to D15
D15 CHECK THE CUSHION TILT MOTOR CIRCUITS FOR A SHORT TO GROUND WITH THE ENGINE OFF
Disconnect: Driver Seat Cushion Tilt Motor C383.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-10
Ground
Click to display connectors
Positive lead
Measurement/Action
Negative lead
C341C-1
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 D37.
No
REPAIR the faulty circuit. GO to D37.
D16 CHECK THE CUSHION TILT MOTOR CIRCUITS FOR AN OPEN
Disconnect: Driver Seat Cushion Tilt Motor C383.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-10
C383-1
Click to display connectors
Positive lead
Measurement/Action
Negative lead
C341C-1
C383-3
C341C-9
C383-3
Is the resistance less than 3 ohms?
Yes
GO to D17
No
REPAIR the faulty circuit. GO to D37.
D17 CHECK THE VOLTAGE AT THE CUSHION TILT 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: driver seat cushion tilt motor C383.
Connect: DSM C341B and C341C.
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: Because the seat motor electrical connector is disconnected, the DSM may activate the seat motor output for approximately 500 ms, then turn off. Activate the seat control switch position (cushion tilt up and down) while observing the test 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 D37.
No
GO to D36.
D18 CHECK THE HEIGHT MOTOR CIRCUITS FOR A SHORT TO VOLTAGE
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
Disconnect: DSM C341B and C341C.
The ignition is on.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-1
Ground
C341B-2
Ground
Is there voltage present?
Yes
GO to D19
No
GO to D20
D19 CHECK THE HEIGHT MOTOR CIRCUITS FOR A SHORT TO VOLTAGE WITH THE ENGINE OFF
Ignition OFF.
Disconnect: Driver Seat Height Adjustment Motor C363.
The ignition is on.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-1
Ground
C341B-2
Ground
Is there voltage present?
Yes
REPAIR the faulty circuit. GO to D37.
No
INSTALL a new driver seat track. REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation). GO to D37.
D20 CHECK THE HEIGHT MOTOR CIRCUITS FOR A SHORT TO GROUND
Ignition OFF.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-1
Ground
C341B-2
Ground
Is the resistance greater than 10000 ohms?
Yes
GO to D22
No
GO to D21
D21 CHECK THE HEIGHT MOTOR CIRCUITS FOR A SHORT TO GROUND WITH THE ENGINE OFF
Disconnect: Driver Seat Height Adjustment Motor C363.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-1
Ground
C341B-2
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 D37.
No
REPAIR the faulty circuit. GO to D37.
D22 CHECK THE HEIGHT MOTOR CIRCUITS FOR AN OPEN
Disconnect: Driver Seat Height Adjustment Motor C363.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-1
C363-3
C341B-2
C363-1
Is the resistance less than 3 ohms?
Yes
GO to D23
No
REPAIR the faulty circuit. GO to D37.
D23 CHECK THE VOLTAGE AT THE HEIGHT 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: Driver Seat Height Motor C363.
Connect: DSM C341B and C341C.
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: Because the seat motor electrical connector is disconnected, the DSM may activate the seat motor output for approximately 500 ms, then turn off. Activate the seat control switch positions (height up and down) while observing the test light.
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 D37.
No
GO to D36.
D24 CHECK THE HORIZONTAL MOTOR CIRCUITS FOR A SHORT TO VOLTAGE
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
Disconnect: DSM C341B.
The ignition is on.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-5
Ground
C341B-6
Ground
Is there voltage present?
Yes
GO to D25
No
GO to D26
D25 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-5
Ground
C341B-6
Ground
Is there voltage present?
Yes
REPAIR the faulty circuit. GO to D37.
No
INSTALL a new driver seat horizontal motor. REFER TO: Front Seat Motor (501-10A Front Seats, Removal and Installation). GO to D37
D26 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-5
Ground
C341B-6
Ground
Is the resistance greater than 10000 ohms?
Yes
GO to D28
No
GO to D27
D27 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-5
Ground
C341B-6
Ground
Is the resistance greater than 10000 ohms?
Yes
INSTALL a new driver seat horizontal motor. REFER TO: Front Seat Motor (501-10A Front Seats, Removal and Installation). GO to D37
No
REPAIR the faulty circuit. GO to D37.
D28 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-5
C362-1
C341B-6
C362-3
Is the resistance less than 3 ohms?
Yes
GO to D29
No
REPAIR the faulty circuit. GO to D37.
D29 CHECK THE VOLTAGE AT THE HORIZONTAL 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: Driver Seat Horizontal Motor C362.
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: Because the seat motor electrical connector is disconnected, the DSM may activate the seat motor output for approximately 500 ms, then turn off. Activate the seat control switch positions (horizontal forward and rearward) while observing the test light.
Does the test lamp illuminate momentarily when the seat control switch is activated in both directions?
Yes
INSTALL a new driver seat horizontal motor. REFER TO: Front Seat Motor (501-10A Front Seats, Removal and Installation). GO to D37
No
GO to D36.
D30 CHECK THE RECLINER MOTOR CIRCUITS FOR A SHORT TO VOLTAGE
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
Disconnect: DSM C341B and C341D.
The ignition is on.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-3
Ground
C341B-4
Ground
Is there voltage present?
Yes
GO to D31
No
GO to D32
D31 CHECK THE FRONT VERTICAL TILT MOTOR CIRCUITS FOR A SHORT TO VOLTAGE WITH THE ENGINE OFF
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-3
Ground
C341B-4
Ground
Is there voltage present?
Yes
REPAIR the faulty circuit. GO to D37.
No
INSTALL a new driver seat back frame. GO to D37
D32 CHECK THE FRONT RECLINER MOTOR CIRCUITS FOR A SHORT TO GROUND
Ignition OFF.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C341B-3
Ground
C341B-4
Ground
Is the resistance greater than 10000 ohms?
Yes
GO to D34
No
GO to D33
D33 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-3
Ground
C341B-4
Ground
Is the resistance greater than 10000 ohms?
Yes
INSTALL a new driver seat back frame. GO to D37
No
REPAIR the faulty circuit. GO to D37.
D34 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-3
C3187-3
C341B-4
C3187-1
Is the resistance less than 3 ohms?
Yes
GO to D35
No
REPAIR the faulty circuit. GO to D37.
D35 CHECK THE VOLTAGE AT THE RECLINER 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: Driver Seat Tilt Motor C3187.
Connect: DSM C341B and C341D.
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: Because the seat motor electrical connector is disconnected, the DSM may activate the seat motor output for approximately 500 ms, then turn off. Activate the seat control switch positions (tilt forward and rearward) while observing the test light.
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 D37
No
GO to D36.
D36 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 C3051 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 article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service information resolves this concern, INSTALL a new DSM. REFER TO: Driver Front Seat Module (DSM) (501-10A Front Seats, Removal and Installation). GO to D37
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 D37
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Connect: Driver Side Integrated Air Bag C3051.
Connect all previously disconnected connectors.
Reconfigure the SRS. 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 TEST E: MEMORY SEAT INOPERATIVE USING MEMORY SETTING 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 ground short is detected on the switch input circuit during the DDM self-test, a DTC is set. If activity is sensed on the circuit input for more than 2 minutes, the DTC is set as a continuous DTC. With the DTC set, any input signal on the circuit is ignored.
DDM B1C04:23
Memory Switch No. 2: Low Signal
If a ground short is detected on the switch input circuit during the DDM self-test, a DTC is set. If activity is sensed on the circuit input for more than 2 minutes, the DTC is set as a continuous DTC. With the DTC set, any input signal on the circuit is ignored.
DDM B1C05:23
Memory Switch No. 3: Low Signal
If a ground short is detected on the switch input circuit during the DDM self-test, a DTC is set. If activity is sensed on the circuit input for more than 2 minutes, the DTC is set as a continuous DTC. With the DTC set, any input signal on the circuit is ignored.
DSM B14CB:11
Rear Seat Height Feedback: Short to Ground
If a ground short is present on the position sensor feedback circuit of the affected motor (Hall effect), a DTC is set. After the DTC is set, memory recall is not possible, but the seat control switch can operate the corresponding motor in two-second steps.
DSM B14CB:12
Rear Seat Height Feedback: Short to Battery
If a short to voltage is present on the position sensor feedback circuit of the corresponding motor (Hall effect), a DTC is set. After the DTC is set, memory recall is not possible, but the seat control switch can operate the corresponding motor in two-second steps.
DSM B14CE:31
Horizontal Seat Motor Power: No Signal
During the DSM self-test, the DSM attempts to operate the corresponding seat track motor and uses the motor position sensor to monitor movement. If no motor movement is detected, a DTC is set. The DSM repeats the motor operation at the next activation of the seat control switch. If no movement is detected within 250 milliseconds, the DSM turns off the output.
DSM B14CF:31
Recline Seat Motor Output Signal: No Signal
During the DSM self-test, the DSM attempts to operate the corresponding seat motor and uses the motor position sensor to monitor movement. If no motor movement is detected, a DTC is set. The DSM repeats the motor operation at the next activation of the seat control switch. If no movement is detected within 250 milliseconds, the DSM turns off the output.
DSM B14D0:31
Front Seat Height/Recline Motor Output Signal: No Signal
During the DSM self-test, the DSM attempts to operate the corresponding seat track motor and uses the motor position sensor to monitor movement. If no motor movement is detected, a DTC is set. The DSM repeats the motor operation at the next activation of the seat control switch. If no movement is detected within 250 milliseconds, the DSM turns off the output.
DSM B14D2:31
Rear Seat Height Motor Power: No Signal
During the DSM self-test, the DSM attempts to operate the corresponding seat track motor and uses the motor position sensor to monitor movement. If no motor movement is detected, a DTC is set. The DSM repeats the motor operation at the next activation of the seat control switch. If no movement is detected within 250 milliseconds, the DSM turns off the output.
DSM B1B89:11
Seat Slide Motor Speed/Position Sensor: Short to Ground
If a ground short is present on the position sensor feedback circuit of the affected motor (Hall effect), a DTC is set. After the DTC is set, memory recall is not possible, but the seat control switch can operate the corresponding motor in two-second steps.
DSM B1B89:12
Seat Slide Motor Speed/Position Sensor: Short to Battery
If a short to voltage is present on the position sensor feedback circuit of the corresponding motor (Hall effect), a DTC is set. After the DTC is set, memory recall is not possible, but the seat control switch can operate the corresponding motor in two-second steps.
DSM B1B91:11
Recline Seat Motor Speed/Position Sensor: Short to Ground
If a ground short is present on the position sensor feedback circuit of the affected motor (Hall effect), a DTC is set. After the DTC is set, memory recall is not possible, but the seat control switch can operate the corresponding motor in two-second steps.
DSM B1B91:12
Recline Seat Motor Speed/Position Sensor: Short to Battery
If a short to voltage is present on the position sensor feedback circuit of the corresponding motor (Hall effect), a DTC is set. After the DTC is set, memory recall is not possible, but the seat control switch can operate the corresponding motor in two-second steps.
DSM B1B93:11
Recline Seat Motor Speed/Position Sensor: Short to Ground
If a ground short is present on the position sensor feedback circuit of the affected motor (Hall effect), a DTC is set. After the DTC is set, memory recall is not possible, but the seat control switch can operate the corresponding motor in two-second steps.
DSM B1B93:12
Recline Seat Motor Speed/Position Sensor: Short to Battery
If a short to voltage is present on the position sensor feedback circuit of the corresponding motor (Hall effect), a DTC is set. After the DTC is set, memory recall is not possible, but the seat control switch can operate the corresponding motor in two-second steps.
Possible Sources
Memory seat hard/soft stops installed incorrectly
Wiring, Terminals or Connectors
SET memory switch
Ignition status information is missing
DDM
E1 CHECK DSM (DRIVER SEAT MODULE) IGNITION STATUS PID (PARAMETER IDENTIFICATION) STATES
The ignition is on.
Access the BCM and monitor the IGN_SW_STATE PID
Using the diagnostic scan tool, monitor the PID while switching the ignition from ON to OFF and back to ON.
Do the PID states agree?
Yes
GO to E2
No
To diagnose a loss of power in operation, REFER TO: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical, Component Diagnosis and Testing).
E2 CHECK DIAGNOSTIC TROUBLE CODES (DTCS)
Try to operate the memory seat in all directions.
Place the memory seat in the middle of each travel range.
Using the 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 Module Communications Network, Diagnosis and Testing).
Are any diagnostic trouble codes (DTCs) present?
Yes
For DTC B1C03:23, B1C04:23 or B1C05:23, GO to E4. For DTC B1B91:11, B1B91:12 or B14D0:31, GO to E10. For DTC B14CB:11, B14CB:12 or B14D2:31, GO to E13. For DTC B1B89:11, B1B89:12 or B14CE:31, GO to E16. For DTC B1B93:11, B1B93:12 or B14CF:31, GO to E19. For all other diagnostic trouble codes (DTCs), REFER TO the DTC table(s) in this section.
No
GO to E3
E3 MONITOR DSM (DRIVER SEAT MODULE) PARAMETER IDENTIFICATION (PIDS) AND CHECK MEMORY SWITCH INPUTS FOR CORRECT OPERATION
While activating memory recall buttons 1, 2 and 3, monitor the following DDM memory recall switch parameter identification (PID) states 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
GO to E9
No
GO to E4
E4 CHECK THE MEMORY SEAT SWITCH
Ignition OFF.
Disconnect: Driver Door Lock Control Switch C522.
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
C522, pin 5, component side
C522, 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
C522, pin 4, component side
C522, 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
C522, pin 3, component side
C522, 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 E5
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).
E5 CHECK THE MEMORY SWITCH GROUND CIRCUIT FOR OPEN
Ignition OFF.
Disconnect: DDM C501A.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C522-6
C501A-10
Is the resistance less than 3 ohms?
Yes
GO to E6
No
REPAIR the circuit.
E6 CHECK THE MEMORY SET CIRCUITS FOR A SHORT TO VOLTAGE
The ignition is on.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C522-3
Ground
C522-4
Ground
C522-5
Ground
Is there voltage present?
Yes
REPAIR the faulty circuit.
No
GO to E7
E7 CHECK THE MEMORY SWITCH CIRCUITS FOR A SHORT TO GROUND
Ignition OFF.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C522-3
Ground
C522-4
Ground
C522-5
Ground
Is the resistance greater than 10000 Ohms?
Yes
GO to E8
No
REPAIR the faulty circuit.
E8 CHECK THE MEMORY SEAT SWITCH CIRCUITS FOR AN OPEN
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C522-3
C501A-17
C522-4
C501A-16
C522-5
C501A-15
Is the resistance less than 3 ohms?
Yes
GO to E22
No
REPAIR the faulty circuit.
E9 CHECK THE SEAT OPERATION
Using the seat control switch, attempt to operate the seat in the following directions:
Cushion tilt up and down
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 Pinpoint Test D. If the front seat vertical movement occurs only at one-second intervals, GO to E10. If the rear seat vertical movement occurs only at one-second intervals, GO to E13. If the seat horizontal movement occurs only at one-second intervals, GO to E16. If the seat tilt movement occurs only at one-second intervals, GO to E19.
E10 CHECK THE CUSHION TILT SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
Disconnect: DSM C341B and C341C.
Disconnect: Driver Seat Cushion Tilt Motor C382.
The ignition is on.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C382-2
Ground
C382-4
Ground
Is there voltage present?
Yes
REPAIR the faulty circuit. GO to E23
No
GO to E11
E11 CHECK THE CUSHION TILT SENSOR CIRCUITS FOR A SHORT TO GROUND
Ignition OFF.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C382-2
Ground
C382-4
Ground
Is the resistance greater than 10000 ohms?
Yes
GO to E12
No
REPAIR the faulty circuit. GO to E23
E12 CHECK THE CUSHION TILT SENSOR CIRCUITS FOR AN OPEN
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C382-4
C341C-11
C382-2
C341C-13
Is the resistance less than 3 ohms?
Yes
INSTALL a new driver seat track. REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation). GO to E23
No
REPAIR the faulty circuit. GO to E23
E13 CHECK THE HEIGHT SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
Disconnect: DSM C341B and C341C.
Disconnect: Driver Seat Height Adjustment Motor C363.
The ignition is on.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C363-2
Ground
C363-4
Ground
Is there voltage in any of the circuits?
Yes
REPAIR the faulty circuit. GO to E23
No
GO to E14
E14 CHECK THE HEIGHT SENSOR CIRCUITS FOR A SHORT TO GROUND
Ignition OFF.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C363-2
Ground
C363-4
Ground
Is the resistance greater than 10000 ohms?
Yes
GO to E15
No
REPAIR the faulty circuit. GO to E23
E15 CHECK THE HEIGHT SENSOR CIRCUITS FOR AN OPEN
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C363-4
C341C-13
C363-2
C341C-12
Is the resistance less than 3 ohms?
Yes
INSTALL a new driver seat track. REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation). GO to E23
No
REPAIR the faulty circuit. GO to E23
E16 CHECK THE HORIZONTAL SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
Disconnect: DSM C341B and C341C.
Disconnect: Driver Seat Horizontal Motor C362.
The ignition is on.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C362-2
Ground
C362-4
Ground
Is there voltage in any of the circuits?
Yes
REPAIR the faulty circuit. GO to E23
No
GO to E17
E17 CHECK THE HORIZONTAL SENSOR CIRCUITS FOR A SHORT TO GROUND
Ignition OFF.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C362-2
Ground
C362-4
Ground
Is the resistance greater than 10000 ohms?
Yes
GO to E18
No
REPAIR the faulty circuit. GO to E23
E18 CHECK THE HORIZONTAL SENSOR CIRCUITS FOR AN OPEN
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C362-4
C341C-10
C362-2
C341C-13
Is the resistance less than 3 ohms?
Yes
INSTALL a new driver seat track. REFER TO: Front Seat Track (501-10A Front Seats, Removal and Installation). GO to E23
No
REPAIR the faulty circuit. GO to E23
E19 CHECK THE RECLINER SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
Disconnect: DSM C341B, C341C and C341D.
Disconnect: Driver Seat Tilt Motor C3189.
The ignition is on.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C3189-2
Ground
C3189-4
Ground
Is there voltage present?
Yes
REPAIR the faulty circuit. GO to E23
No
GO to E20
E20 CHECK THE RECLINER SENSOR CIRCUITS FOR A SHORT TO GROUND
Ignition OFF.
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C3189-2
Ground
C3189-4
Ground
Is the resistance greater than 10000 ohms?
Yes
GO to E21
No
REPAIR the faulty circuit. GO to E23
E21 CHECK THE RECLINER SENSOR CIRCUITS FOR AN OPEN
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C3189-2
C341D-11
Action: Click to display the connectors
Positive lead
Measurement/Action
Negative lead
C3189-4
C341C-13
Is the resistance less than 3 ohms?
Yes
INSTALL a new driver seat back frame. GO to E23
No
REPAIR the faulty circuit. GO to E23
E22 CHECK THE 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 applies to this condition, STOP this test and FOLLOW the service article instructions. If no service articles address this condition, INSTALL a new DDM module. 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.
E23 CHECK THE SRS (SUPPLEMENTAL RESTRAINT SYSTEM) FOR SUCCESSFUL VERIFICATION
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Connect: Driver Side Integrated Air Bag C3051.
Connect all previously disconnected connectors.
Reconfigure the SRS. 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 TEST F: MEMORY SEAT DOES NOT MOVE TO CORRECT MEMORY POSITION
For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.
Normal Operation and Fault Symptoms
PERFORM the DSM self-test and OBTAIN any diagnostic trouble codes (DTCs). REFER TO the DTC table.
REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).
Possible Sources
Memory seat hard/soft stops are incorrectly installed
Diagnostic steps are not provided for this symptom or diagnostic trouble code. REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).
DIAGNOSTIC TEST G: 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 literature for information on linking the RKE transmitter. PERFORM the DSM self-test and REFER TO the DTC. Chart for diagnosing any obtained diagnostic trouble codes (DTCs).
REFER TO: Front Seats - System Operation and Component Description (501-10A Front Seats, Description and Operation).
Possible Sources
RKE transmitter concern
Diagnostic steps are not provided for this symptom or diagnostic trouble code. REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).
DIAGNOSTIC TEST H: EASY ENTRY/EASY EXIT INOPERATIVE/IMPROPER 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.
H1 CHECK THE POWER DRIVER 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 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 OK, INSTRUCT the customer on the correct system operation. If enabled, GO to H2.
H2 CHECK THE DSM (DRIVER SEAT MODULE) IGNITION SWITCH STATUS PID (PARAMETER IDENTIFICATION)
The ignition is on.
Access the BCM and monitor the IGN_SW_STATE PID
Using the diagnostic scan tool, monitor the PID while switching the ignition from ON to OFF and back to ON.
Do the PID states agree?
Yes
INSTALL a new DSM. REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).
No
CHECK the ignition switch status. REFER TO: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical Components, Diagnosis and Testing).
DIAGNOSTIC TEST I: 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.
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 U0100:00
Lost Communication with ECM/PCM 'A': No Sub Type Information
Set when the DSM 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
I1 CONFIRM THE CUSTOMER CONCERN
The ignition is on.
Make sure the observed symptom is present.
Is the observed symptom present?
Yes
GO to I2.
No
The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent condition.
I2 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 I3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
Using the scan tool, clear the Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Using the scan tool, repeat the DSM self-test.
Is DTC U0253:87 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 FOR DTC U0253:87 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. For the procedure, 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 TEST L: DTC: U1000:00
For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.
Normal Operation and Fault Symptoms
DIAGNOSE any other related DSM Diagnostic Trouble Codes (DTCs) first. CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test. If DTC U1000:00 returns, INSTALL a new DSM. REFER TO: Driver Seat Module (DSM) (501-10A Front Seats, Removal and Installation).
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 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
DSM
Diagnostic steps are not provided for this symptom or diagnostic trouble code. REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).
DIAGNOSTIC TEST M: DTC: U2100:00
For circuit diagrams and connector information, refer to Wiring Diagrams cell 123.
Normal Operation and Fault Symptoms
Using the scan tool, PERFORM the PMI on the DSM. REPEAT the self-test and VERIFY the PMI was successful.
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 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.
Diagnostic steps are not provided for this symptom or diagnostic trouble code. REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).
DIAGNOSTIC TEST N: 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).
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 U3000:49
Control Module: Internal Electronic Failure
This DTC indicates an internal module fault. The module must be replaced.
Possible Sources
DSM
Diagnostic steps are not provided for this symptom or diagnostic trouble code. REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).
DIAGNOSTIC TEST O: SEAT HEATERS INOPERATIVE - DRIVER AND PASSENGER
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 the BJB 39 (20A) fuse is OK.
O1 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
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 DTC Chart.
No
GO to O3
O2 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 O3
No
CHECK the BJB fuse 39 (20A) is OK. If OK, REPAIR the circuit. If not OK, REFER TO the Electrical Circuit Diagrams to determine the possible causes of the short circuit.
O3 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 address this concern, INSTALL a new HVAC module. REFER TO: Heating, Ventilation and Air Conditioning (HVAC) Control 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 TEST P: SEAT HEATER INOPERATIVE/IMPROPER OPERATION - DRIVER
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 detects that the left front heater element current draw has exceeded the specified threshold. When this DTC is set, the HVAC module disables the circuit until the ignition is turned off.
HVAC B1034:12
Front Left Seat Heater Element: Short to Battery
Sets when the HVAC module detects voltage in the left front heater circuit above the specified threshold while the driver is active. When this DTC sets, the HVAC module disables the circuit until the ignition is turned off.
HVAC B1034:13
Front Left Seat Heater Element: Open Circuit
Sets when the HVAC module detects voltage in the left front heater circuit above the specified threshold while the driver is active. When this DTC sets, the HVAC module disables the circuit until the ignition is turned off.
HVAC B1034:15
Front Left Seat Heater Element: Short to Battery or Open Circuit
Sets when the HVAC module detects voltage in the left front heater circuit above the specified threshold while the driver is active. When this DTC sets, the HVAC module disables the circuit until the ignition is turned off.
HVAC B1034:13
Front Left Seat Heater Element: Open Circuit
Sets when the HVAC module detects current draw in the left front heating element below the specified threshold. When this DTC sets, the HVAC module disables the circuit until the ignition is turned off.
HVAC B1038:11
Front Left Seat Heater Sensor: Short to Ground
Sets when the HVAC module detects left front seat heater sensor voltage outside the acceptable range. When this DTC sets, the HVAC module disables the circuits until the ignition is turned off.
HVAC B1038:15
Front Left Seat Heater Sensor: Short to Battery or Open Circuit
Sets when the HVAC module detects left front seat heater sensor voltage outside the acceptable range. When this DTC sets, the HVAC module disables the circuits until the ignition is turned off.
Possible Sources
Wiring, Terminals or Connectors
Heater Pad
HVAC Module
P1 CHECK HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
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, B1034:13 or B1034:15 GO to P4 For DTC B1038:11 or B1038:15 GO to P6 For information on all other diagnostic trouble codes (DTCs), REFER to the DTC Chart.
No
GO to P2
P2 CHECK HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE SEAT HEATER CONTROL PID (PARAMETER IDENTIFICATION)
Start the engine.
Access the HVAC module and monitor the CC_SW_D_HSEATS PID
Using a diagnostic scan tool, monitor the PID 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 P3
No
INSTALL a new HVAC module. REFER TO: Heating, Ventilation and Air Conditioning (HVAC) Control 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-1
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
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
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 P15
No
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
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 P9
No
REPAIR the circuit. GO to P15
P6 CHECK THE SEAT HEATER TEMPERATURE SENSOR CIRCUIT FOR AN OPEN OR A SHORT TO GROUND
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Driver Side Integrated Air Bag C3051.
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 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
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 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
C364-2
Ground
Is there voltage present?
Yes
REPAIR the circuit. GO to P15
No
GO to P13
P9 CHECK THE HEATING 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 P10
No
REPAIR the circuit. GO to P15
P10 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
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 P11
No
INSTALL a new driver seat cushion heater pad. REFER TO: Seat Heater Pad Removal (Front Seats 501-10A, 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
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 P12
No
INSTALL a new driver seat back heater pad. REFER TO: Seat Heater Pad Removal (Front Seats 501-10A, 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
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 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
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 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.
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 in 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 address this concern, INSTALL a new HVAC module. REFER TO: Heating, Ventilation and Air Conditioning (HVAC) Control 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
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Connect: Driver Side Integrated Air Bag C3051.
Connect all previously disconnected connectors.
Reconfigure the SRS. 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 TEST Q: HEATED SEAT INOPERATIVE/IMPROPER OPERATION - PASSENGER
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
Sets when the HVAC module detects current draw in the right front heating element above the specified threshold. When this DTC sets, the HVAC module disables the circuit until the ignition is turned off.
HVAC B1036:12
Front Right Seat Heater Element: Short to Battery
Sets when the HVAC module detects voltage in the right front heater circuit above the specified threshold while the driver is active. When this DTC sets, the HVAC module disables the circuit until the ignition is turned off.
HVAC B1036:13
Front Right Seat Heater Element: Open Circuit
Sets when the HVAC module detects voltage in the right front heater circuit above the specified threshold while the driver is active. When this DTC sets, the HVAC module disables the circuit until the ignition is turned off.
HVAC B1036:15
Front Right Seat Heater Element: Short to Battery or Open Circuit
Sets when the HVAC module detects voltage in the right front heater circuit above the specified threshold while the driver is active. When this DTC sets, the HVAC module disables the circuit until the ignition is turned off.
HVAC B1036:13
Front Right Seat Heater Element: Open Circuit
Set when the HVAC module detects that the current of the right front seat heater element is below the specified threshold. When this DTC is set, the HVAC module disables the circuit until the ignition is turned off.
HVAC B103A: 11
Front Right Seat Heater Sensor: Short to Ground
Set when the HVAC module detects that the voltage of the right front seat heater sensor is outside the acceptable range. When this DTC is set, the HVAC module disables the circuits until the ignition is turned off.
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 seat heater sensor is outside the acceptable range. When this DTC is set, the HVAC module disables the circuits until the ignition is turned off.
Possible Sources
Wiring, Terminals or Connectors
Heater Pad
HVAC Module
Q1 CHECK HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
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, B1036:13 or B1036:15, GO to Q4. For DTC B103A:11 or B103A:15, GO to Q6. For information on all other diagnostic trouble codes (DTCs), REFER to the DTC Chart.
No
GO to Q2
Q2 CHECK HVAC (HEATING, VENTILATION AND AIR CONDITIONING) MODULE SEAT HEATER CONTROL PID (PARAMETER IDENTIFICATION)
Start the engine.
Access the HVAC and monitor the CC_SW_P_HSEATS PID
Using a diagnostic scan tool, monitor the PID 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 Q3
No
INSTALL a new HVAC module. REFER TO: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation).
Q3 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 Q4
No
REPAIR the circuit.
Q4 CHECK THE HEATER ELEMENT POWER CIRCUIT FOR A SHORT TO VOLTAGE
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Passenger Side Integrated Air Bag C339.
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 Q15
No
GO to Q5
Q5 CHECK THE HEATER ELEMENT POWER 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 Q9
No
REPAIR the circuit. GO to Q15
Q6 CHECK THE SEAT TEMPERATURE SENSOR CIRCUIT FOR AN OPEN OR A SHORT TO GROUND
De-power the SRS. REFER TO: Supplemental Restraint System (SRS) Disarming and Arming (501-20B Supplemental Restraint System, General Procedures).
Disconnect: Passenger Side Integrated Air Bag C339.
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 Q15
Q7 CHECK THE 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
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 Q8
No
REPAIR the open circuit or REFER to the Wiring Diagrams Manual to identify possible causes of the short to ground. GO to Q15
Q8 CHECK THE 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
C334-2
Ground
Is there voltage present?
Yes
REPAIR the circuit. GO to Q15
No
GO to Q13
Q9 CHECK THE HEATER 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 Q10
No
REPAIR the circuit. GO to Q15
Q10 CHECK THE SEAT CUSHION HEATER FOR AN OPEN OR A 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 Q11
No
INSTALL a new passenger seat cushion heater mat. REFER TO: Seat Heater Mat (501-10A, General Procedures). GO to Q15
Q11 CHECK THE SEAT CUSHION HEATER MAT 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 Q12
No
INSTALL a new passenger seat back heater mat. REFER TO: Seat Heater Mat (501-10A, General Procedures). GO to Q15
Q12 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
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 Q14
No
REPAIR the circuit. GO to Q15
Q13 CHECK THE SEAT 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 Q14
No
INSTALL a new passenger seat cushion heater mat. REFER TO: Seat Heater Mat (501-10A, General Procedures). GO to Q15
Q14 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 address this concern, INSTALL a new HVAC module. REFER TO: Heating, Ventilation and Air Conditioning (HVAC) Control Module (412-00 Climate Control System - General Information, Removal and Installation). GO to Q15
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 Q15
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