Ford Escape Quiz
Body and Paint

Diagnosis and Testing - Body Closures

In this manual: Body and Paint
General Information — 26Chassis — 160Powertrain — 323Electrical — 356Body and Paint — 290
~81min read

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
BCM B11C4:23 Liftgate/Tailgate Close Switch: Low Signal GO to Pinpoint Test C
BCM B1219:11 Interior Liftgate/Tailgate Open Switch: Short to Ground GO to Pinpoint Test C
BCM B12E8:23 Liftgate/Tailgate Control/Unlatch Switch: Constantly Low Signal GO to Pinpoint Test C
BCM B144C: ​​23 Rear Door/Liftgate/Tailgate Exterior Handle Switch: Low Signal GO to Pinpoint Test C
BCM B1495:02 Liftgate/Tailgate Hands-Free Input Sensor: General Signal Failure GO to Pinpoint Test J
BCM B1495:08 Liftgate/Tailgate Hands-Free Input Sensor: Signal/Message Bus Failure GO to Pinpoint Test J
BCM B1495:11 Liftgate/Liftglass Ajar Switch: Short to Ground GO to Pinpoint Test J
BCM B1495:49 Hands-Free Liftgate/Liftglass Ajar Sensor: Internal Electronic Failure GO to Pinpoint Test J
BCM B1495:55 Hands-Free Liftgate/Liftglass Ajar Sensor: Not Configured GO to Pinpoint Test P
RKE B12E8:11 Liftgate/Liftglass Unlatch Button Switch: Short to Ground GO to Pinpoint Test C
RKE B144D: 29 Liftgate/Liftglass/Tailgate/Trunk Position Sensor 1: Invalid Signal GO to Pinpoint Test B
RKE B144E:29 Liftgate/Liftglass/Tailgate/Trunk Position Sensor 2: Invalid Signal GO to Pinpoint Test B
RKE B144F:11 Liftgate/Liftglass/Tailgate/Trunk Motor: Short to Ground GO to Pinpoint Test B
RKE B144F:12 Liftgate/Liftglass/Tailgate/Trunk Motor: Short to Battery GO to Pinpoint Test B
RKE B144F:13 Liftgate/Liftglass/Tailgate/Trunk Power Actuator Motor: Open Circuit GO to Pinpoint Test B
RKE B144F: 79 Liftgate/Liftglass/Tailgate/Trunk Power Actuator Motor: Mechanical Linkage Malfunction GO to Pinpoint Test B
RKE B1451:29 Liftgate/Liftglass/Tailgate/Trunk Lock Center Position Switch: Invalid Signal GO to Pinpoint Test D
RKE B1452:11 Liftgate/Liftglass/Tailgate/Trunk Lock Actuator: Short to Ground GO to Pinpoint Test A
RKE B1452:13 Liftgate/Liftglass/Tailgate/Trunk Lock Actuator: Circuit Open GO to Pinpoint Test A
RKE B1453:29 Liftgate/Liftglass/Tailgate/Trunk Latch Position Switch: Invalid Signal GO to Pinpoint Test D
RKE B1454:11 Liftgate/Liftglass/Tailgate/Trunk Left Striker: Circuit Short to Ground GO to Pinpoint Test G
RKE B1454:13 Liftgate/Liftglass/Tailgate/Trunk Left Striker: Circuit Open GO to Pinpoint Test G
RKE B1455:11 Liftgate/Liftglass/Tailgate/Trunk Right Striker: Circuit Short to Ground GO to Pinpoint Test G
RKE B1455:13 Liftgate/Liftglass/Tailgate/Trunk Right Striker: Circuit Open GO to Pinpoint Test G
RKE B145D:11 Liftgate/Liftglass/Tailgate/Trunk Power Cinch Striker Motor: Short to Ground GO to Pinpoint Test D
RKE B145D:12 Liftgate/Liftglass/Tailgate/Trunk Power Cinch Striker Motor: Short to Battery GO to Pinpoint Test D
RKE B145D:13 Liftgate/Liftglass/Tailgate/Trunk Power Cinch Striker Motor: Circuit Open GO to Pinpoint Test D
RKE B1515:77 Liftgate/Liftglass/Tailgate/Trunk: Commanded Position Not Available GO to Pinpoint Test B
RKE B1515:97 Liftgate/Liftglass/Tailgate/Trunk: Component or System Operation Obstructed or Stuck GO to Pinpoint Test B
RKE B1555:29 Liftgate/Liftglass/Tailgate/Trunk Position Sensor 4: Invalid Signal GO to Pinpoint Test B
RKE B1556:29 Liftgate/Liftglass/Tailgate/Trunk Position Sensor 3: Invalid Signal GO to Pinpoint Test B
RKE B1557:11 Liftgate/Liftglass Power Actuator 2 Motor: Short to Ground GO to Pinpoint Test B
RKE B1557:12 Liftgate/Liftglass Power Actuator 2 Motor: Short to Battery GO to Pinpoint Test B
RKE B1557:13 Liftgate/Liftglass Power Actuator 2 Motor: Circuit Open GO to Pinpoint Test B
RKE C1B14:11 Sensor Supply Voltage A: Circuit Short to Ground GO to Pinpoint Test B
RKE C1B15:11 Sensor Supply Voltage B: Circuit Short to Ground GO to Pinpoint Test B
RKE P0A2F: 4B Power Actuator "A" Overtemperature: Overtemperature GO to Pinpoint Test B
RKE P0A35:4B Power Actuator "B" Overtemperature: Overtemperature GO to Pinpoint Test B
RKE U0101:87 Lost Communication with TCM: No Sub Type Information GO to Pinpoint Test K
RKE U0140:87 Lost Communication with Body Control Module: No Sub Type Information GO to Pinpoint Test L
RKE U0294:87 Lost Communication with Powertrain Control Module Monitor: No Sub Type Information GO to Pinpoint Test M
RKE U201A: 55 Control Module Primary Calibration Data: Not Configured GO to Pinpoint Test Q
RKE U2300:56 Central Configuration: Incorrect/Incompatible Configuration GO to Pinpoint Test Q
RKE U3000:49 Control Module: Internal Electronic Failure GO to Pinpoint Test Q
RKE U3003:16 Battery Voltage: Circuit Voltage Below Threshold GO to Pinpoint Test N
RKE U3003:17 Battery Voltage: Circuit Voltage Above Threshold GO TO Pinpoint Test O

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
Fit and Finish/Body > Body Panels > Liftgate/Liftglass > Alignment GO TO Pinpoint Test R
Fit and Finish/Body > Body Panels > Liftgate/Liftglass > Alignment GO to Pinpoint Test S
Fit and Finish/Body > Body Panels > Liftgate/Liftglass > Alignment GO TO Pinpoint Test T
Fit and Finish/Body > Body Panels > Liftgate/Liftglass > Hard to Close GO to Pinpoint Test G
Fit and Finish/Body > Body Panels > Liftgate/Liftglass > Hard to Open GO to Pinpoint Test A
Fit and Finish/Body > Body Panels > Liftgate/Liftglass > Poor Fit GO TO Pinpoint Test R
Fit and Finish/Body > Body Panels > Liftgate/Liftglass > Poor Fit GO TO Pinpoint Test T
Fit and Finish/Body > Body Panels > Liftgate/Liftglass > Power Control GO to Pinpoint Test B
Fit and Finish/Body > Body Panels > Liftgate/Liftglass > Power Control GO to Pinpoint Test C
Fit and Finish/Body > Body Panels > Liftgate/Liftglass > Power Function GO to Pinpoint Test B
Fit and Finish/Body > Body Panels > Liftgate/Liftglass > Power Function GO to Pinpoint Test D
Fit and Finish/Body > Body Panels > Liftgate/Liftglass > Power Function GO to Pinpoint Test F
Fit and Finish/Body > Body Panels > Liftgate/Liftglass > Power Function GO to Pinpoint Test G
Secure and Reliable > Locks/Latches > Liftgate/Liftglass > Hard to Open GO to Pinpoint Test A
Secure and Reliable > Locks/Latches > Liftgate/Liftglass > Sticks/Binds GO TO Pinpoint Test R
Secure and Reliable > Locks/Latches > Liftgate/Liftglass > Sticks/Binds GO TO Pinpoint Test T
Secure and Reliable > Remote Entry > Control > Inoperative GO to Pinpoint Test C
Secure and Reliable > Handle/Lever > Liftgate/Liftglass > Hard to Close GO to Pinpoint Test G

Symptom Chart

Symptom Chart: Power Liftgate

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).

Condition Action
Power Liftgate Inoperative from RKE Transmitter
  • CHECK the inoperative RKE transmitter button.
    REFER TO: Locks, Latches and Entry Systems (501-14 Door Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
Power Liftgate Passive Entry Function Inoperative.
  • CHECK the inoperative liftgate passive entry function.
    REFER TO: Locks, Latches and Entry Systems (501-14 Door Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
Power Liftgate Does Not Open
  • GO to Pinpoint Test A
Liftgate Opens But Power Liftgate Inoperative
  • GO to Pinpoint Test B
Power Liftgate Inoperative from One of the Power Liftgate Control Switches
  • GO to Pinpoint Test C
Power Liftgate Stops at Second Latch Position.
  • GO to Pinpoint Test D
Power Liftgate Stops During Power Opening GO TO Pinpoint Test R
Power Liftgate Stops and Chimes at Fully Open Position GO to Pinpoint Test S
Power Liftgate Reverses During Power Closing
  • GO to Pinpoint Test E
Liftgate Pinch Strip Does Not Stop or Reverse the Liftgate.
  • GO to Pinpoint Test F
Power Liftgate Does Not Close (Opens Normally)
  • GO to Pinpoint Test G
Power Liftgate Does Not Open (Closes Normally)
  • GO to Pinpoint Test H
Power Liftgate Closes (With Continuous Chime) Immediately After Power Opening.
  • GO to Pinpoint Test I
Power liftgate does not operate hands-free
  • GO to Pinpoint Test J
Power liftgate makes excessive noise during operation GO TO Pinpoint Test T

Pinpoint Tests


PINPOINT TEST A: POWER LIFTGATE DOES NOT RESPOND

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Symptoms

Refer to: Body Locks and Latches - System Operation and Component Description (501-03 Body Locks and Latches, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
RGTM B1452:11 Liftgate/Liftglass/Tailgate/Trunk Lock Actuator: Short to Ground Set when the RGTM detects a short to ground in the liftgate latch actuator output circuit.
RGTM B1452:13 Liftgate/Liftglass/Tailgate/Trunk Lock Actuator: Circuit Open Set when the RGTM detects an open in the liftgate latch actuator output circuit.

Possible Sources

  • Fuse
  • Wiring, Terminals or Connectors
  • Communication Problem
  • Liftgate latch
  • BJB
  • RKE
  • Low/High Voltage

Visual Inspection and Pre-checks

  • Check the BJB 41 (30A) fuse for integrity.
  • Verify the RGTM is updated to the latest software calibration.

NOTICE: Use the correct probe adapter(s) when making measurements. Using incorrect probe adapter(s) may damage the connector.

NOTICE: The following Pinpoint Test uses a test lamp to simulate normal circuit loads. Use only the Rotunda test lamp (SGT27000) or a 300 mA incandescent bulb. To avoid 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.

A1 CHECK THE RGTM (REAR GATE TAILGATE MODULE) PID (PARAMETER IDENTIFICATION)
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • LIFTG_DECKL_AJAR
  • Monitor the PID -
    • The liftgate open status must display as closed when the liftgate is closed.

Do the PIDs match the liftgate latch status?
Yes GO to A2
No Using the diagnostic scan tool, begin the RGTM PMI process and follow the on-screen instructions.
Refer to: Module Programming (418-01 Module Configuration, General Procedures).
A2 CHECK THE BATTERY VOLTAGE SUPPLY TO THE LIFTGATE LATCH
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • Gate_Lgc_V
    • Gate_Pwr_V
  • Monitor the PID -
    • Power supply A and power supply B must be above 8.8V for unlock.
    • Power supply A and power supply B must be above 10.5V for powered operation.

Do the PIDs match the liftgate latch status?
Yes GO to A3
No REPAIR the circuit.
A3 CHECK THE LIFTGATE LATCH MANUAL UNLOCK
  • Mechanically unlock the liftgate.
    Refer to: Manual Release of the Power Liftgate Latch (501-14 Handles, Locks, Latches and Entry Systems, General Procedures).
    Refer to: Manual Release of the Power Liftgate Latch (501-14 Handles, Locks, Latches and Entry Systems, General Procedures).

Does the liftgate latch open?
Yes GO to A4
No INSTALL a new power liftgate latch.
Refer to: Liftgate Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).
Refer to: Liftgate Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).
A4 CHECK THE RGTM (REAR GATE TAILGATE MODULE) HIGH CURRENT VOLTAGE
  • Ignition OFF.
  • Disconnect the RGTM C4174A.
  • Connect:
    Click to display connectors
    Positive lead Measurement/Action Negative lead
    C4174A-2 Ground

Does the test lamp illuminate?
Yes GO to A6
No GO to A5
A5 CHECK THE RGTM (REAR GATE TAILGATE MODULE) HIGH CURRENT VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Disconnect the BJB C1035B.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4174A-2 C1035B-19

Is the resistance less than 3 ohms?
Yes INSTALL a new BJB.
No REPAIR the circuit.
A6 CHECK THE VOLTAGE AT THE POWER LIFTGATE LATCH MOTOR
  • Connect the RGTM C4174A.
  • Disconnect the power liftgate latch C4339A.
  • Unlock the liftgate using the door lock control switch.
  • Connect:
    Click to display connectors
    Positive lead Measurement/Action Negative lead
    C4339A-2 Ground
  • NOTE: The RGTM only applies voltage to the actuator momentarily. It is important to watch the test lamp while pressing the liftgate unlock switch. Hold the liftgate open switch and watch the test lamp.

Does the test lamp illuminate momentarily?
Yes GO to A7
No GO to A8
A7 CHECK THE POWER LIFTGATE LATCH GROUND CIRCUIT FOR AN OPEN
  • Connect:
    Click to display connectors
    Positive lead Measurement/Action Negative lead
    C4339A-2 C4339A-5
  • NOTE: The RGTM only applies voltage to the actuator momentarily. It is important to watch the test lamp while pressing the liftgate unlock switch. Hold the liftgate open switch and watch the test lamp.

Does the test lamp illuminate momentarily?
Yes INSTALL a new power liftgate latch.
Refer to: Liftgate Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).
No REPAIR the circuit.
A8 CHECK THE RGTM (REAR GATE TAILGATE MODULE) FOR A SHORT TO GROUND IN THE LIFTGATE LATCH UNLOCK OUTPUT CIRCUIT
  • Disconnect the RGTM C4174A.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4174A-9 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to A9
No REPAIR the circuit.
A9 CHECK THE RGTM (REAR GATE TAILGATE MODULE) LIFTGATE LATCH UNLOCK OUTPUT CIRCUIT FOR AN OPEN
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4174A-9 C4339A-2

Is the resistance less than 3 ohms?
Yes GO to A10
No REPAIR the circuit.
A10 CHECK THE RGTM (REAR GATE TAILGATE MODULE) FOR PROPER OPERATION
  • Disconnect and inspect all RGTM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect all RGTM connectors and make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new RGTM.
Refer to: Rear Gate Tailgate Module (RGTM) (501-03 Body Locks and Latches, 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.
PINPOINT TEST B: POWER LIFTGATE UNLATCHES BUT POWER LIFTGATE DOES NOT OPERATE

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Symptoms

Refer to: Body Locks and Latches - System Operation and Component Description (501-03 Body Locks and Latches, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
RGTM P0A2F:4B Drive Motor 'A' Overtemperature: Overtemperature This DTC sets when the RGTM detects excessive internal heating of the power liftgate motor.
RGTM P0A35:4B Drive Motor 'B' Overtemperature: Overtemperature This DTC sets when the RGTM detects excessive internal heating of the power liftgate motor.
RGTM B1515:77 Liftgate/Liftglass/Tailgate/Trunk: Commanded Position Not Available Set when the RGTM does not receive a liftgate position signal from the liftgate sensor.
RGTM B1515:97 Liftgate/Liftglass/Tailgate/Trunk: Component or System Operation Obstructed or Stuck Set when the power liftgate operation is restricted or blocked due to liftgate misalignment.
RGTM C1B14:11 Sensor Supply Voltage A: Circuit Short to Ground Set when the RGTM detects a short to ground in the power liftgate sensor supply circuit.
RGTM C1B15:11 Sensor Supply Voltage B: Circuit Short to Ground Set when the RGTM detects a short to ground in the power liftgate sensor supply circuit.
RGTM B144D:29 Liftgate/Liftglass/Tailgate/Trunk Position Sensor 1: Invalid Signal Set when the RGTM does not receive a signal from the power liftgate motor sensor 1 input, or the sensor inputs are out of phase.
RGTM B144E:29 Liftgate/Liftglass/Tailgate/Trunk Position Sensor 2: Invalid Signal Set when the RGTM does not receive a signal from the power liftgate motor sensor 2 input, or the sensor inputs are out of phase.
RGTM B1556:29 Liftgate/Liftglass/Tailgate/Trunk Position Sensor 3: Invalid Signal Set when the RGTM does not receive a signal from the rear liftgate motor sensor 3 input or the sensor inputs are out of phase.
RGTM B1555:29 Liftgate/Liftglass/Tailgate/Trunk Position Sensor 4: Invalid Signal Set when the RGTM does not receive a signal from the rear liftgate motor sensor 4 input or the sensor inputs are out of phase.
RGTM B144F:11 Liftgate/Liftglass/Tailgate/Trunk Motor: Short to Ground Set when the RGTM detects a short to ground in the liftgate power liftgate left motor circuit.
RGTM B144F:12 Liftgate/Liftglass/Tailgate/Trunk Motor: Short to Battery Set when the RGTM detects a short to battery voltage in the liftgate power liftgate left motor circuit.
RGTM B144F:13 Liftgate/Liftglass/Tailgate/Trunk Power Actuator Motor: Open Circuit Set when the RGTM detects an open in the liftgate power liftgate left motor circuit.
RGTM B144F:79 Liftgate/Liftglass/Tailgate/Trunk Power Actuator Motor: Mechanical Linkage Malfunction Set when the RGTM detects that the power liftgate strut is not holding the liftgate open.
RGTM B1557:11 Liftgate/Liftglass Power Actuator 2 Motor: Short to Ground Set when the RGTM detects an open in the rear liftgate right motor circuit.
RGTM B1557:12 Liftgate/Liftglass Power Actuator 2 Motor: Short to Battery Set when the RGTM detects an open in the rear liftgate right motor circuit.
RGTM B1557:13 Liftgate/Liftglass Power Actuator 2 Motor: Circuit Open Set when the RGTM detects an open in the rear liftgate right motor circuit.

Possible Sources

  • Wiring, Terminals or Connectors
  • Liftgate latch
  • Rear Door Motor
  • RKE

NOTICE: Use the correct probe adapter(s) when making measurements. Using incorrect probe adapter(s) may damage the connector.

B1 CHECK THE COMMUNICATION WITH THE RGTM (REAR LIFTGATE MODULE)
  • Using the diagnostic scan tool, perform the network test.

Does the RGTM pass the network test?
Yes GO to B2
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
B2 CHECK THE RGTM (REAR LIFTGATE MODULE) PID (PARAMETER IDENTIFICATION)
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • LIFTG_DECKL_AJAR
  • Monitor the PID -
    • The liftgate open status must change to OPEN after unlocking or to CLOSED after locking.

Do the PIDs match the liftgate latch status?
Yes GO to B3
No Using the diagnostic scan tool, begin the RGTM PMI process and follow the on-screen instructions.
Refer to: Module Programming (418-01 Module Configuration, General Procedures).
B3 CHECK THE POWER LIFTGATE STRUT POSITION SENSOR
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • TAILGATE_POS
  • Monitor the PID -
    • The position counter must start at 0 when the liftgate is closed and increase when the liftgate is opened manually.

Do the parameter identifications (PIDs) match the rear liftgate position sensor status?
Yes GO to B4
No GO to B14
B4 CHECK THE BATTERY VOLTAGE SUPPLY TO THE LIFTGATE LATCH
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • Gate_Lgc_V
    • Gate_Pwr_V
  • Monitor the PID -
    • Power supply A and power supply B must be above 8.8V for unlock.
    • Power supply A and power supply B must be above 10.5V for powered operation.

Do the PIDs match the liftgate latch status?
Yes GO to B5
No REPAIR the circuit.
B5 CHECK THE LIFTGATE LATCH PRIMARY AND SECONDARY SWITCH PARAMETER IDENTIFICATIONS (PIDS)
  • Using the diagnostic scan tool, view the RGTM parameter identifications (PIDs).
  • Using the diagnostic scan tool, monitor the following RGTM parameter identifications (PIDs):
    • Liftgate Primary Switch Input (LIFTG_PRIM_SW)
    • Liftgate Latch Secondary Position Signal (LATCH_SECND_SW)
    • Liftgate Latch Power Unit Home Position Switch (LATCH_HOME_SW)
    • Liftgate Latch Pawl Switch (TAILGATE_PWL_SW)
  • NOTE: The liftgate is in the home position when the liftgate is in the fully closed position. The liftgate is in the latch position when the rear liftgate is open and has fully disengaged from the striker. Start with the liftgate open, then slowly close the liftgate to the secondary latch (first click), and then to the primary latch position (second click).
    Rear Liftgate Latch Position LIFTG_PRIM_SW LATCH_SECND_SW TAILGATE_PWL_SW LATCH_HOME_SW
    Fully Unlatched Pressed Pressed Pressed Not Pressed
    Secondary (first click) Not Pressed Pressed Not Pressed Not Pressed
    Primary (second click) Not Pressed Not Pressed Not Pressed Not Pressed

Do the switch states match the table?
Yes GO to B6
No GO to B7
B6 CHECK THE OPERATION OF ALL POWER LIFTGATE INPUTS
  • The ignition is on.
  • Clear the DTCs.
  • Select PARK.
  • Unlock the liftgate using the door lock control switch.
  • Fully close the liftgate (manually if necessary).
  • Open and close the power liftgate using the front interior rear liftgate switch (located on the instrument panel).
  • Open and close the power liftgate using the programmed RKE transmitter.
  • Open the power liftgate using the exterior liftgate open switch.
  • Close the power liftgate using the rear cargo area power liftgate switch (located at the bottom of the liftgate trim panel).

Does the power liftgate open or close from any input?
Yes GO to the Symptom Chart and CHECK for the correct symptom.
No GO to B7
B7 CHECK THE RGTM (REAR LIFTGATE MODULE) COMMUNICATION AND VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, perform the RGTM self-test.

Is DTC U0101:87, U0140:87, U0294:87, U3003:16 or U3003:17 present?
Yes For DTC U0101:87, GO to Pinpoint Test K.
For DTC U0140:87, GO to Pinpoint Test L.
For DTC U0294:87, GO to Pinpoint Test M.
For DTC U3003:16, GO to Pinpoint Test N.
For DTC U3003:17, GO to Pinpoint Test O.
No GO to B8
B8 CHECK THE POWER LIFTGATE MOTOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Review the RGTM self-test results.

Is DTC B144F:11, B144F:12, B144F:13, B144F:79, B1557:11, B1557:12, B1557:13, B1515:77 or B1515:97 present?
Yes For DTC B1515:77 or B1515:97, first CHECK all other DTCs. If no other DTC is present, MANUALLY open the liftgate and CHECK for a mechanical bind. If a mechanical bind is present, REPAIR as necessary. If no mechanical bind is found, CHECK the liftgate alignment.
For DTC P0A2F:4B or P0A35:4B, INSTALL a new rear liftgate motor.
REFER TO: Rear Liftgate Motor (501-03 Body Closures, Removal and Installation). For all other DTCs, GO to B9.
No GO to B13
B9 CHECK THE POWER LIFTGATE MOTOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect the RGTM C4174B.
  • Disconnect the suspect rear liftgate motor.
  • The ignition is on.
  • Action:
    Click to display the connectors

    Left Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4332-9 Ground
    C4332-2 Ground

    Click to display the connectors

    Right Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4225-9 Ground
    C4225-2 Ground

Is there voltage present?
Yes REPAIR the faulty circuit.
No GO to B10
B10 CHECK THE POWER LIFTGATE MOTOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Action:
    Click to display the connectors

    Left Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4332-9 Ground
    C4332-2 Ground

    Click to display the connectors

    Right Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4225-9 Ground
    C4225-2 Ground

Is the resistance greater than 10000 ohms?
Yes GO to B11
No REPAIR the faulty circuit.
B11 CHECK THE POWER LIFTGATE MOTOR CIRCUITS FOR A SHORT TOGETHER
  • Action:
    Click to display the connectors

    Left Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4332-9 C4332-2

    Click to display the connectors

    Right Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4225-9 C4225-2

Is the resistance greater than 10000 Ohms?
Yes GO to B12
No REPAIR the circuits.
B12 CHECK THE POWER LIFTGATE ACTUATOR CIRCUITS FOR AN OPEN
  • Action:
    Click to display the connectors

    Left Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4332-2 C4174B-13
    C4332-9 C4174B-1

    Click to display the connectors

    Right Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4225-2 C4174B-14
    C4225-9 C4174B-2

Is the resistance less than 3 ohms?
Yes GO to B14
No REPAIR the faulty circuit.
B13 CHECK THE POWER LIFTGATE LATCH ACTUATOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Review the RGTM self-test results.

Are DTC B144D:29, B144E:29, B1555:29 or B1556:29 present?
Yes GO to B14
No GO TO B18
B14 CHECK THE POWER LIFTGATE LATCH ACTUATOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect the RGTM C4174B.
  • Disconnect the suspect power liftgate motor.
  • The ignition is on.
  • Action:
    Click to display the connectors

    Left Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4332-4 Ground
    C4332-5 Ground
    C4332-6 Ground
    C4332-7 Ground

    Click to display the connectors

    Right Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4225-4 Ground
    C4225-5 Ground
    C4225-6 Ground
    C4225-7 Ground

Is there voltage present?
Yes REPAIR the faulty circuit.
No GO TO B15
B15 CHECK THE POWER LIFTGATE LATCH ACTUATOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Action:
    Click to display the connectors

    Left Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4332-4 Ground
    C4332-5 Ground
    C4332-6 Ground
    C4332-7 Ground

    Click to display the connectors

    Right Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4225-4 Ground
    C4225-5 Ground
    C4225-6 Ground
    C4225-7 Ground

Is the resistance greater than 10000 ohms?
Yes GO TO B16
No REPAIR the faulty circuit.
B16 CHECK THE POWER LIFTGATE LATCH ACTUATOR CIRCUITS FOR A SHORT
  • Action:
    Click to display the connectors

    Left Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4332-4 C4332-5
    C4332-4 C4332-6
    C4332-4 C4332-7
    C4332-5 C4332-6
    C4332-5 C4332-7
    C4332-6 C4332-7

    Click to display the connectors

    Right Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4225-4 C4225-5
    C4225-4 C4225-6
    C4225-4 C4225-7
    C4225-5 C4225-6
    C4225-5 C4225-7
    C4225-6 C4225-7

Is the resistance greater than 10000 ohms?
Yes GO TO B17
No REPAIR the affected circuits.
B17 CHECK THE POWER LIFTGATE LATCH ACTUATOR CIRCUITS FOR AN OPEN
  • Action:
    Click to display the connectors

    Left Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4332-4 C4174B-18
    C4332-5 C4174B-15
    C4332-6 C4174B-16
    C4332-7 C4174B-17

    Click to display the connectors

    Right Rear Liftgate Motor


    Positive lead Measurement/Action Negative lead
    C4225-4 C4174B-23
    C4225-5 C4174B-20
    C4225-6 C4174B-21
    C4225-7 C4174B-22

Is the resistance less than 3 ohms?
Yes INSTALL the power liftgate motor in question.
REFER to: Power Liftgate Motor (501-03 Body Closures, Removal and Installation). CHECK the system for normal operation. GO to B19.
No REPAIR the faulty circuit.
B18 CHECK THE OTHER POWER LIFTGATE LATCH DIAGNOSTIC TROUBLE CODES (DTCS)
  • Review the RGTM self-test results.

Are any RGTM diagnostic trouble codes (DTCs) present?
Yes For information on all other diagnostic trouble codes (DTCs), REFER to RGTM. DTC Chart in this section.
No For DTCs B145D:11, B145D:12 or B145D:13, GO to Pinpoint Test D.
B19 CHECK THE RGTM (REAR GATE TAILGATE MODULE) FOR NORMAL OPERATION
  • Disconnect and inspect all RGTM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect all RGTM connectors and make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new RGTM.
Refer to: Rear Gate Tailgate Module (RGTM) (501-03 Body Locks and Latches, 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.
PINPOINT TEST C: POWER LIFTGATE DOES NOT OPERATE DUE TO ONE OF THE POWER LIFTGATE CONTROL SWITCHES

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Symptoms

Refer to: Body Locks and Latches - System Operation and Component Description (501-03 Body Locks and Latches, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
RGTM B12E8:11 Liftgate/Liftglass Unlatch Button Switch: Short to Ground Set when the BCM detects a short to ground in the input circuit of the external liftgate unlatch switch.
BCM B11C4:23 Liftgate/Tailgate Close Switch: Low Signal Set when the RGTM detects a short to ground in the input circuit of the power liftgate open switch.
BCM B12E8:23 Liftgate/Tailgate Control/Unlatch Switch: Constantly Low Signal Set when the RGTM detects a short to ground in the input circuit of the power liftgate front open switch.
BCM B144C:23 Rear Door/Liftgate/Tailgate Exterior Handle Switch: Low Signal Set when the RGTM detects a short to ground in the input circuit of the external liftgate unlatch switch.
BCM B1219:11 Interior Liftgate/Tailgate Open Switch: Short to Ground Set when the BCM detects a short to ground in the input circuit of the external liftgate unlatch switch.

Possible Sources

  • Wiring, Terminals or Connectors
  • Power liftgate front open switch
  • Power liftgate rear open switch
  • External liftgate open switch
  • BCM
  • RKE

NOTICE: Use the correct probe adapter(s) when making measurements. Using incorrect probe adapter(s) may damage the connector.

C1 CHECK THE POWER LIFTGATE LATCH POSITION SENSOR
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • TAILGATE_POS
  • Monitor the PID -
    • The position counter must start at 0 when the liftgate is closed and increase when the liftgate is opened manually.

Do the parameter identifications (PIDs) match the rear liftgate position sensor status?
Yes GO to C2
No GO to C3
C2 CHECK THE BATTERY VOLTAGE SUPPLY TO THE LIFTGATE LATCH
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • Gate_Lgc_V
    • Gate_Pwr_V
  • Monitor the PID -
    • Power supply A and power supply B must be above 8.8V for unlock.
    • Power supply A and power supply B must be above 10.5V for powered operation.

Do the PIDs match the liftgate latch status?
Yes GO to C3
No REPAIR the circuit.
C3 CHECK THE POWER LIFTGATE OPERATION FROM ALL SWITCH INPUTS
  • Ignition OFF.
  • Select PARK.
  • The ignition is on.
  • Close the liftgate (manually, if necessary).
  • Unlock the liftgate using the door lock control switch.
  • Open and close the power liftgate using the front interior rear liftgate switch (located on the instrument panel).
  • Open the power liftgate using the exterior liftgate open switch.
  • Close the power liftgate using the rear power liftgate switch (located at the bottom of the liftgate trim panel).

Does the power liftgate open or close from any input?
Yes GO TO C4
No GO to the Symptom Chart and CHECK for the correct symptom.
C4 CHECK THE POWER LIFTGATE SWITCH STATUS
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • TAILGATE_LCK_SW_INP
    • TAILGATE_IP-CS_SW
    • TAILGATE_REL_SW
    • TAILGATE_SHUT_SW

Do the Parameter Identifications (PIDs) indicate that the switch is pressed?
Yes GO to C6
No GO to C5
C5 ISOLATE THE SUSPECT POWER LIFTGATE SWITCH FROM A SHORT TO GROUND (PARAMETER IDENTIFICATION)
  • Ignition OFF.
  • Disconnect the suspect power liftgate switch.
  • The ignition is on.
  • Using the diagnostic scan tool, monitor the following RGTM parameter identifications (PIDs):
    • TAILGATE_LCK_SW_INP
    • TAILGATE_IP-CS_SW
    • TAILGATE_REL_SW
    • TAILGATE_SHUT_SW

Does the PID in question continue to indicate that the switch is pressed?
Yes For the external liftgate open switch, GO to C6.
For the power liftgate front or rear open switch, GO to C7.
No INSTALL a new power liftgate switch.
C6 ISOLATE THE BCM (BODY CONTROL MODULE) SHORT WHEN CHECKING THE RGTM (REAR GATE TAILGATE MODULE) LFTGATE_R_SW() PID (PARAMETER IDENTIFICATION)
  • Ignition OFF.
  • Disconnect C2280C.
  • The ignition is on.
  • Using the diagnostic scan tool, monitor the RGTM LFTGATE_R_SW() PID.

Does the PID continue to indicate that the switch is pressed?
Yes GO TO C7
No GO TO C11
C7 CHECK THE POWER LIFTGATE SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect the RGTM C4174A.
  • Action:
    Click to display the connectors

    Power liftgate front open switch


    Positive lead Measurement/Action Negative lead
    C4174A-19 Ground

    Click to display the connectors

    Rear Interior Power Liftgate Switch


    Positive lead Measurement/Action Negative lead
    C4174A-20 Ground

    Click to display the connectors

    Exterior Liftgate Release Switch


    Positive lead Measurement/Action Negative lead
    C4174A-8 Ground

Is the resistance greater than 10000 Ohms?
Yes GO TO C12
No REPAIR the circuit.
C8 BYPASS THE SUSPECT POWER LIFTGATE SWITCH
  • Ignition OFF.
  • Disconnect the suspect power liftgate switch.
  • Unlock the liftgate using the door lock control switch.
  • NOTE: The liftgate must be open for this step if the suspect component is the power liftgate switch. Connect the following to the suspect power liftgate switch:
    Click to display connectors

    Front liftgate switch in the cabin


    Positive lead Measurement/Action Negative lead
    C205-12 C205-1

    Click to display the connectors

    Power liftgate control switch in the cabin


    Positive lead Measurement/Action Negative lead
    C4333-6 C4333-2

    Click to display the connectors

    Exterior Liftgate Release Switch


    Positive lead Measurement/Action Negative lead
    C4353-1 C4353-2
  • Remove the fused jumper wire.

Does the liftgate open or close?
Yes INSTALL a new power liftgate switch.
No GO TO C9
C9 CHECK THE POWER LIFTGATE SWITCH POWER SUPPLY CIRCUIT FOR AN OPEN
  • Connect the following to the suspect power liftgate switch:
    Click to display connectors

    Front liftgate switch in the cabin


    Positive lead Measurement/Action Negative lead
    C205-12 Ground

    Click to display the connectors

    Power liftgate control switch in the cabin


    Positive lead Measurement/Action Negative lead
    C4333-6 Ground

    Click to display the connectors

    Exterior Liftgate Release Switch


    Positive lead Measurement/Action Negative lead
    C4353-1 Ground
  • Remove the fused jumper wire.

Does the liftgate open or close?
Yes REPAIR the circuit.
No GO TO C10
C10 CHECK THE POWER LIFTGATE SWITCH INPUT CIRCUIT FOR AN OPEN
  • Disconnect the RGTM C4174B.
  • For the suspect power liftgate switch, measure:
    Click to display connectors

    Front liftgate switch in the cabin


    Positive lead Measurement/Action Negative lead
    C205-12 C4174A-19

    Click to display the connectors

    Power liftgate switch in the cabin


    Positive lead Measurement/Action Negative lead
    C4333-6 C4174A-20

    Click to display the connectors

    Exterior Liftgate Release Switch


    Positive lead Measurement/Action Negative lead
    C4353-1 C4174A-8

Is the resistance less than 3 ohms?
Yes GO TO C12
No REPAIR the circuit.
C11 CHECK THE BCM (BODY CONTROL MODULE) FOR NORMAL OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect all BCM connectors and make sure they are properly installed and latched.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new BCM. Refer to the Removal and Installation procedure in Section 419-10.
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.
C12 CHECK RGTM (POWER LIFTGATE MODULE) OPERATION
  • Disconnect and inspect all RGTM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect all RGTM connectors and make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new RGTM.
Refer to: Rear Gate Tailgate Module (RGTM) (501-03 Body Locks and Latches, 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.
PINPOINT TEST D: POWER LIFTGATE STOPS IN SECONDARY LATCH POSITION

Normal Operation and Fault Symptoms

Refer to: Body Locks and Latches - System Operation and Component Description (501-03 Body Locks and Latches, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
RGTM B145D:11 Liftgate/Liftglass/Tailgate/Trunk Power Cinch Striker Motor: Short to Ground Sets when the RGTM detects a short to ground in one of the power liftgate latch motor circuits.
RGTM B145D:12 Liftgate/Liftglass/Tailgate/Trunk Power Cinch Striker Motor: Short to Battery Sets when the RGTM detects a short to battery voltage in one of the power liftgate latch motor circuits.
RGTM B1451:29 Liftgate/Liftglass/Tailgate/Trunk Lock Center Position Switch: Invalid Signal Sets when the RGTM detects that the sector gear open/close switch(es) are not in the correct state at the start of the self-test, or there is no sector gear switch transition during release/latch.
RGTM B1453:29 Liftgate/Liftglass/Tailgate/Trunk Latch Position Switch: Invalid Signal Sets when the RGTM detects that the sector gear open/close switch(es) are not in the correct state at the start of the self-test, or there is no sector gear switch transition during release/latch.
RGTM B145D:13 Liftgate/Liftglass/Tailgate/Trunk Power Cinch Striker Motor: Circuit Open Sets when the RGTM detects an open circuit in one of the power liftgate latch motor circuits.

Possible Sources

  • Liftgate Alignment
  • Power Liftgate Latch Alignment
  • Mechanical Binding
D1 CHECK RGTM (POWER LIFTGATE MODULE) PID (PARAMETER IDENTIFICATION)
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • LIFTG_DECKL_AJAR
  • Monitor the PID -
    • The liftgate open status must display as closed when the liftgate is closed.

Do the PIDs match the liftgate latch status?
Yes GO to D2
No Using the diagnostic scan tool, begin the RGTM PMI process and follow the on-screen instructions.
Refer to: Module Programming (418-01 Module Configuration, General Procedures).
D2 CHECK POWER LIFTGATE ACTUATOR POSITION SENSOR
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • TAILGATE_POS
  • Monitor the PID -
    • The position counter must display a value of 0 after the liftgate is manually closed.

Do the parameter identifications (PIDs) match the rear liftgate position sensor status?
Yes GO to D3
No GO to D4
D3 CHECK BATTERY VOLTAGE SUPPLY TO THE POWER LIFTGATE LATCH
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • Gate_Lgc_V
    • Gate_Pwr_V
  • Monitor the PID -
    • Power supply A and power supply B must be above 8.8V for unlock.
    • Power supply A and power supply B must be above 10.5V for powered operation.

Do the PIDs match the liftgate latch status?
Yes GO to D4
No REPAIR the circuit.
D4 CHECK POWER LIFTGATE SELF-TEST LEARN STATUS
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • LIFTG_DECKL_STS

Has the power liftgate return learn been completed?
Yes GO to D5
No GO to D7
D5 CHECK PRIMARY AND SECONDARY LIFTGATE LATCH AND LATCH SWITCH PARAMETER IDENTIFICATION (PIDS)
  • Using the diagnostic scan tool, view the RGTM parameter identifications (PIDs).
  • Using the diagnostic scan tool, monitor the following RGTM parameter identifications (PIDs):
    • Liftgate Primary Switch Input (LIFTG_PRIM_SW)
    • Liftgate Latch Secondary Position Signal (LATCH_SECND_SW)
    • Liftgate Latch Power Unit Home Position Switch (LATCH_HOME_SW)
    • Liftgate Latch Pawl Switch (TAILGATE_PWL_SW)
  • NOTE: The liftgate is in the home position when the liftgate is in the fully closed position. The liftgate is in the latch position when the rear liftgate is open and has fully disengaged from the striker. Start with the liftgate open, then slowly close the liftgate to the secondary latch (first click), and then to the primary latch position (second click).
    Rear Liftgate Latch Position LIFTG_PRIM_SW LATCH_SECND_SW TAILGATE_PWL_SW LATCH_HOME_SW
    Fully Unlatched Pressed Pressed Pressed Not Pressed
    Secondary (first click) Not Pressed Pressed Not Pressed Not Pressed
    Primary (second click) Not Pressed Inactive Not Pressed Not Pressed

Do the switch states match the table?
Yes GO to D6
No GO to D8
D6 CHECK POWER LIFTGATE MANUAL OPERATION
  • Disable the power liftgate from the message center.
  • Open and close the liftgate manually and check the liftgate for:
    • Liftgate alignment/wedge
    • Liftgate strut operation (the strut must hold or push the liftgate when opened more than halfway)
    • Power liftgate actuator (must move freely when the liftgate is opened and closed manually and be securely attached to the liftgate and bracket)
    • Power liftgate latch (must fully latch)

Does the liftgate open and close correctly?
Yes GO to D7
No REPAIR as necessary.
D7 CHECK LIFTGATE LATCH AND STRIKER
  • Inspect the latch and striker for correct alignment.

Are the latch and striker correctly aligned?
Yes GO to D11
No ALIGN the liftgate and the striker.
D8 CHECK POWER LIFTGATE LATCH INPUT CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect the RGTM C4174A.
  • Disconnect the power liftgate latch C4339A.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4339A-1 Ground
    C4339A-3 Ground
    C4339A-4 Ground

Is the resistance greater than 10000 ohms?
Yes GO to D9
No REPAIR the faulty circuit.
D9 CHECK POWER LIFTGATE LATCH INPUT CIRCUITS FOR A SHORT TO EACH OTHER
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4339A-1 C4339A-3
    C4339A-1 C4339A-4
    C4339A-4 C4339A-3

Is the resistance greater than 10000 ohms?
Yes GO to D10
No REPAIR the affected circuits.
D10 CHECK POWER LIFTGATE LATCH INPUT CIRCUITS FOR AN OPEN CIRCUIT
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4339A-1 C4174A-16
    C4339A-3 C4174A-18
    C4339A-4 C4174A-15

Is the resistance less than 3 ohms?
Yes INSTALL a new power liftgate latch.
REFER TO: Power Liftgate Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).
REFER TO: Power Liftgate Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation). CHECK the system for normal operation. If the concern persists, GO to D17.
No REPAIR the faulty circuit.
D11 CHECK POWER LIFTGATE LATCH MOTOR CIRCUITS FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect the RGTM C4174A.
  • Disconnect the power liftgate latch C4339B.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4174A-13 Ground
    C4174A-1 Ground

Is there voltage present?
Yes REPAIR the faulty circuit.
No GO to D12
D12 CHECK POWER LIFTGATE LATCH MOTOR CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4174A-13 Ground
    C4174A-1 Ground

Is the resistance greater than 10000 ohms?
Yes GO to D13
No REPAIR the faulty circuit.
D13 CHECK POWER LIFTGATE LATCH MOTOR CIRCUITS FOR A SHORT
  • Ignition OFF.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4174A-13 C4174A-1

Is the resistance greater than 10000 Ohms?
Yes GO to D14
No REPAIR the circuits.
D14 CHECK POWER LIFTGATE LATCH MOTOR CIRCUITS FOR AN OPEN CIRCUIT
  • Ignition OFF.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4174A-13 C4339B-1
    C4174A-1 C4339B-2

Is the resistance less than 3 ohms?
Yes GO to D15
No REPAIR the faulty circuit.
D15 CHECK POWER LIFTGATE LATCH MOTOR CIRCUITS FOR A SHORT TO THE SECTOR GEAR SWITCH INPUT CIRCUIT
  • Disconnect the RGTM C4174A.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4339B-1 C4339B-4
    C4339B-2 C4339B-4

Is the resistance greater than 10000 ohms?
Yes GO to D16
No REPAIR the faulty circuit.
D16 CHECK SECTOR GEAR SWITCH INPUT CIRCUIT FOR AN OPEN CIRCUIT
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4174A-17 C4339B-4

Is the resistance less than 3 ohms?
Yes INSTALL a new power liftgate latch.
REFER TO: Power Liftgate Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).
REFER TO: Power Liftgate Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation). CLEAR the DTCs and CHECK the system for normal operation. If the concern persists, GO to D17.
No REPAIR the circuit.
D17 CHECK RGTM (POWER LIFTGATE MODULE) OPERATION
  • Disconnect and inspect all RGTM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect all RGTM connectors and make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new RGTM.
Refer to: Rear Gate Tailgate Module (RGTM) (501-03 Body Locks and Latches, 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.
PINPOINT TEST E: POWER LIFTGATE REVERSES DURING POWER CLOSING OPERATION

Normal Operation and Fault Symptoms

Refer to: Body Locks and Latches - System Operation and Component Description (501-03 Body Locks and Latches, Description and Operation).

Possible Sources

  • Liftgate Alignment
  • Power Liftgate Latch Alignment
  • Mechanical Binding

Visual Inspection and Pre-checks

  • Check for any obstructions pushing the anti-pinch strip.
E1 CHECK POWER LIFTGATE POSITION SENSOR
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • TAILGATE_POS
  • Monitor the PID -
    • The position counter must start at 0 when the liftgate is closed and increase when the liftgate is opened manually.

Do the parameter identifications (PIDs) match the rear liftgate position sensor status?
Yes GO to E2
No GO to E4
E2 CHECK BATTERY VOLTAGE SUPPLY TO THE POWER LIFTGATE LATCH
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • Gate_Lgc_V
    • Gate_Pwr_V
  • Monitor the PID -
    • Power supply A and power supply B must be above 8.8V for unlock.
    • Power supply A and power supply B must be above 10.5V for powered operation.

Do the PIDs match the liftgate latch status?
Yes GO to E3
No REPAIR the circuit.
E3 CHECK ANTI-PINCH SWITCH STATUS
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • ANTIPNC_SEAL_L
    • ANTIPNC_SEAL_R

Does the anti-pinch strip activate during closing?
Yes INSTALL a new liftgate anti-pinch switch.
REFER TO: Power Liftgate Anti-Pinch Switch (501-03 Body Locks, Removal and Installation).
No GO to E4
E4 CHECK PRIMARY AND SECONDARY LIFTGATE LATCH AND LATCH SWITCH PARAMETER IDENTIFICATION (PIDS)
  • Using the diagnostic scan tool, view the RGTM parameter identifications (PIDs).
  • Using the diagnostic scan tool, monitor the following RGTM parameter identifications (PIDs):
    • Liftgate Primary Switch Input (LIFTG_PRIM_SW)
    • Liftgate Latch Secondary Position Signal (LATCH_SECND_SW)
    • Liftgate Latch Power Unit Home Position Switch (LATCH_HOME_SW)
    • Liftgate Latch Pawl Switch (TAILGATE_PWL_SW)
  • NOTE: The liftgate is in the home position when the liftgate is in the fully closed position. The liftgate is in the latch position when the rear liftgate is open and has fully disengaged from the striker. Start with the liftgate open, then slowly close the liftgate to the secondary latch (first click), and then to the primary latch position (second click).
    Rear Liftgate Latch Position LIFTG_PRIM_SW LATCH_SECND_SW TAILGATE_PWL_SW LATCH_HOME_SW
    Fully Unlatched Pressed Pressed Pressed Not Pressed
    Secondary (first click) Not Pressed Pressed Not Pressed Not Pressed
    Primary (second click) Not Pressed Not Pressed Not Pressed Not Pressed

Do the switch states match the table?
Yes GO to E5
No GO to Pinpoint Test D
E5 CHECK POWER LIFTGATE MANUAL OPERATION
  • The ignition is on.
  • Disable the power liftgate from the message center.
  • Open and close the liftgate manually and check the liftgate for:
    • Liftgate alignment/wedge
    • Power liftgate strut operation (the strut must hold or open the liftgate)
    • Power liftgate actuator (must move freely when the liftgate is opened and closed manually and be securely attached to the liftgate and bracket)
    • Power liftgate latch (must fully latch)

Does the liftgate open and close correctly?
Yes GO to Pinpoint Test D
No REPAIR as necessary.
PINPOINT TEST F: POWER LIFTGATE PINCH STRIP DOES NOT STOP OR REVERSE POWER LIFTGATE

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Symptoms

Refer to: Body Locks and Latches - System Operation and Component Description (501-03 Body Locks and Latches, Description and Operation).

Possible Sources

  • Liftgate anti-pinch switch
  • RKE

NOTICE: Use the correct probe adapter(s) when making measurements. Using incorrect probe adapter(s) may damage the connector.

F1 CHECK BATTERY VOLTAGE SUPPLY TO THE POWER LIFTGATE LATCH
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • Gate_Lgc_V
    • Gate_Pwr_V
  • Monitor the PID -
    • Power supply A and power supply B must be above 8.8V for unlock.
    • Power supply A and power supply B must be above 10.5V for powered operation.

Do the PIDs match the liftgate latch status?
Yes GO to F2
No REPAIR the circuit.
F2 CHECK ANTI-PINCH SWITCH STATUS
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • ANTIPNC_SEAL_L
    • ANTIPNC_SEAL_R

Does the anti-pinch strip activate during closing?
Yes GO to F3
No GO to F4
F3 CHECK ANTI-PINCH VOLTAGE
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • L_Pinch_V
    • R_Pinch_V

Is the voltage above 6V?
Yes GO to F4
No REPAIR the circuit.
F4 CHECK RGTM (POWER LIFTGATE MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Using the diagnostic scan tool, perform the RGTM self-test.

Are any diagnostic trouble codes (DTCs) present?
Yes REFER TO the RGTM DTC Chart in this section.
No GO to F5
F5 CHECK POWER LIFTGATE ANTI-PINCH SWITCH
  • Ignition OFF.
  • Disconnect the suspect liftgate anti-pinch switch.
  • Press and release the liftgate anti-pinch switch repeatedly, and measure:
    Positive lead Measurement/Action Negative lead
    C4172, terminal 1, component side C4172, terminal 2, component side
    C4173, terminal 1, component side C4173, terminal 2, component side

Is the resistance between 0 and 200 ohms with the liftgate anti-pinch switch fully pressed, and between 5700 and 6700 ohms with the liftgate anti-pinch switch released?
Yes GO to F6
No INSTALL a new liftgate anti-pinch switch.
REFER TO: Power Liftgate Anti-Pinch Switch (501-03 Body Locks, Removal and Installation).
F6 CHECK RGTM (REAR GATE TAILGATE MODULE) OPERATION
  • Disconnect and inspect all RGTM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect all RGTM connectors and make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new RGTM.
Refer to: Rear Gate Tailgate Module (RGTM) (501-03 Body Locks and Latches, 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.
PINPOINT TEST G: POWER LIFTGATE DOES NOT CLOSE (POWER OPEN OK)

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Symptoms

Refer to: Body Locks and Latches - System Operation and Component Description (501-03 Body Locks and Latches, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
RGTM B1454:11 Liftgate/Liftglass/Tailgate/Trunk Left Striker: Circuit Short to Ground Sets when the RGTM detects a short to ground on the LH anti-pinch switch input.
RGTM B1454:13 Liftgate/Liftglass/Tailgate/Trunk Left Striker: Circuit Open Sets when the RGTM detects an open circuit on the LH anti-pinch switch input.
RGTM B1455:11 Liftgate/Liftglass/Tailgate/Trunk Right Striker: Circuit Short to Ground Sets when the RGTM detects a short to ground on the RH anti-pinch switch input.
RGTM B1455:13 Liftgate/Liftglass/Tailgate/Trunk Right Striker: Circuit Open Sets when the RGTM detects an open circuit on the RH anti-pinch switch input.

Possible Sources

  • Wiring, Terminals or Connectors
  • Liftgate Alignment
  • Power Liftgate Latch Alignment
  • Mechanical Binding
  • Liftgate anti-pinch switch
  • RKE

NOTICE: Use the correct probe adapter(s) when making measurements. Using incorrect probe adapter(s) may damage the connector.

NOTICE: Use the correct probe adapter(s) when making measurements. Using incorrect probe adapter(s) may damage the connector.

G1 CHECK BATTERY VOLTAGE SUPPLY TO REAR LIFTGATE LATCH
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • Gate_Lgc_V
    • Gate_Pwr_V
  • Monitor the PID -
    • Power supply A and power supply B must be above 8.8V for unlock.
    • Power supply A and power supply B must be above 10.5V for powered operation.

Do the PIDs match the liftgate latch status?
Yes GO to G2
No REPAIR the circuit.
G2 CHECK POWER LIFTGATE SELF-TEST LEARN STATUS
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • LIFTG_DECKL_STS

Has the power liftgate return learn been completed?
Yes GO to G3
No Using the diagnostic scan tool, begin the RGTM PMI process and follow the on-screen instructions.
Refer to: Module Programming (418-01 Module Configuration, General Procedures).
G3 CHECK POWER REAR LIFTGATE STRUT POSITION SENSOR
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • TAILGATE_POS
    • MECH_END_POS
  • Monitor the PID -
    • The position counter must start at 0 when the liftgate is closed and increase when the liftgate is opened manually.

Do the parameter identifications (PIDs) match the rear liftgate position sensor status?
Yes GO to G4
No GO to G6
G4 CHECK ANTI-PINCH SWITCH STATUS
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • ANTIPNC_SEAL_L
    • ANTIPNC_SEAL_R

Does the anti-pinch strip activate during closing?
Yes INSTALL a new liftgate anti-pinch switch.
REFER TO: Power Liftgate Anti-Pinch Switch (501-03 Body Locks, Removal and Installation).
No GO to G5
G5 CHECK ANTI-PINCH VOLTAGE
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • L_Pinch_V
    • R_Pinch_V

Is the voltage above 6V?
Yes GO to G6
No REPAIR the circuit.
G6 CHECK RGTM (REAR GATE TAILGATE MODULE) LIFTGATE SWITCH DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Using the diagnostic scan tool, perform the RGTM self-test.

Is DTC B1454:11, B1454:13, B1455:11 or B1455:13 present?
Yes GO to G7
No GO to G12
G7 CHECK LIFTGATE ANTI-PINCH SWITCH
  • Ignition OFF.
  • Disconnect the suspect liftgate anti-pinch switch.
  • Press and release the liftgate anti-pinch switch repeatedly, and measure:
    Positive lead Measurement/Action Negative lead
    C4172, terminal 1, component side C4172, terminal 2, component side
    C4173, terminal 1, component side C4173, terminal 2, component side

Is the resistance between 0 and 200 ohms with the liftgate anti-pinch switch fully pressed, and between 5700 and 6700 ohms with the liftgate anti-pinch switch released?
Yes GO to G8
No INSTALL a new liftgate anti-pinch switch.
REFER TO: Power Liftgate Anti-Pinch Switch (501-03 Body Locks, Removal and Installation).
G8 CHECK LIFTGATE ANTI-PINCH SWITCH CIRCUITS FOR SHORT TO VOLTAGE
  • Disconnect the RGTM C4174A.
  • The ignition is on.
  • Action:
    Click to display the connectors

    LH rear gate anti-pinch switch


    Positive lead Measurement/Action Negative lead
    C4172-1 Ground
    C4172-2 Ground

    Click to display the connectors

    RH rear gate anti-pinch switch


    Positive lead Measurement/Action Negative lead
    C4173-1 Ground
    C4173-2 Ground

Is there voltage present?
Yes REPAIR the faulty circuit.
No GO to G9
G9 CHECK LIFTGATE ANTI-PINCH SWITCH CIRCUITS FOR SHORT TO GROUND
  • Ignition OFF.
  • Action:
    Click to display the connectors

    LH rear gate anti-pinch switch


    Positive lead Measurement/Action Negative lead
    C4172-1 Ground

    Click to display the connectors

    RH rear gate anti-pinch switch


    Positive lead Measurement/Action Negative lead
    C4173-1 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to G10
No REPAIR the circuit.
G10 CHECK LIFTGATE ANTI-PINCH PREVENTION CIRCUITS FOR SHORT TO GROUND TOGETHER
  • Action:
    Click to display the connectors

    LH rear gate anti-pinch switch


    Positive lead Measurement/Action Negative lead
    C4172-1 C4172-2

    Click to display the connectors

    RH rear gate anti-pinch switch


    Positive lead Measurement/Action Negative lead
    C4173-1 C4173-2

Is the resistance greater than 10000 Ohms?
Yes GO to G11
No REPAIR the circuits.
G11 CHECK LIFTGATE ANTI-PINCH SWITCH CIRCUITS FOR OPEN
  • Action:
    Click to display the connectors

    LH rear gate anti-pinch switch


    Positive lead Measurement/Action Negative lead
    C4172-1 C4174A-11
    C4172-2 C4174A-22

    Click to display the connectors

    RH rear gate anti-pinch switch


    Positive lead Measurement/Action Negative lead
    C4173-1 C4174A-12
    C4173-2 C4174A-22

Is the resistance less than 3 ohms?
Yes GO to G14
No REPAIR the faulty circuit.
G12 CHECK OTHER RGTM (REAR GATE TAILGATE MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Review the RGTM self-test results.

Are any diagnostic trouble codes (DTCs) present?
Yes REFER TO the RGTM DTC Chart in this section.
No GO to G13
G13 CHECK LIFTGATE MANUAL OPERATION OF POWER LIFTGATE SUPPORT
  • Disable the power liftgate from the message center.
  • Open and close the liftgate manually and check the liftgate for:
    • Liftgate alignment/wedge
    • Liftgate strut operation (the strut must hold or push the liftgate when opened more than halfway)
    • Power liftgate actuator (must move freely when the liftgate is opened and closed manually and be securely attached to the liftgate and bracket)
    • Power liftgate latch (must fully latch)

Does the liftgate open and close correctly?
Yes GO to Pinpoint Test D
No REPAIR as necessary.
G14 CHECK RGTM (REAR GATE TAILGATE MODULE) OPERATION
  • Disconnect and inspect all RGTM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect all RGTM connectors and make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new RGTM.
Refer to: Rear Gate Tailgate Module (RGTM) (501-03 Body Locks and Latches, 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.
PINPOINT TEST H: POWER LIFTGATE DOES NOT OPEN (POWER CLOSE OK)

Normal Operation and Fault Symptoms

Refer to: Body Locks and Latches - System Operation and Component Description (501-03 Body Locks and Latches, Description and Operation).

Possible Sources

  • Liftgate Alignment
  • Power Liftgate Latch Alignment
  • Mechanical Binding
H1 CHECK LIFTGATE LATCH PRIMARY AND SECONDARY PARAMETER IDENTIFICATION AND LATCH SWITCH (PIDS)
  • Using the diagnostic scan tool, view the RGTM parameter identifications (PIDs).
  • Using the diagnostic scan tool, monitor the following RGTM parameter identifications (PIDs):
    • Liftgate Primary Switch Input (LIFTG_PRIM_SW)
    • Liftgate Latch Secondary Position Signal (LATCH_SECND_SW)
    • Liftgate Latch Power Unit Home Position Switch (LATCH_HOME_SW)
    • Liftgate Latch Pawl Switch (TAILGATE_PWL_SW)
  • NOTE: The liftgate is in the home position when the liftgate is in the fully closed position. The liftgate is in the latch position when the rear liftgate is open and has fully disengaged from the striker. Start with the liftgate open, then slowly close the liftgate to the secondary latch (first click), and then to the primary latch position (second click).
    Rear Liftgate Latch Position LIFTG_PRIM_SW LATCH_SECND_SW TAILGATE_PWL_SW LATCH_HOME_SW
    Fully Unlatched Pressed Pressed Pressed Not Pressed
    Secondary (first click) Not Pressed Pressed Not Pressed Not Pressed
    Primary (second click) Not Pressed Not Pressed Not Pressed Not Pressed

Do the switch states match the table?
Yes GO to H2
No GO to H3
H2 CHECK RGTM (REAR GATE TAILGATE MODULE) PID (PARAMETER IDENTIFICATION)
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • LIFTG_DECKL_AJAR
  • Monitor the PID -
    • The liftgate open status must display as closed when the liftgate is closed.

Do the PIDs match the liftgate latch status?
Yes GO to H3
No INSTALL a new power liftgate latch.
Refer to: Liftgate Latch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation).
H3 CHECK POWER REAR LIFTGATE STRUT POSITION SENSOR
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • TAILGATE_POS
  • Monitor the PID -
    • The position counter must start at 0 when the liftgate is closed and increase when the liftgate is opened manually.

Do the parameter identifications (PIDs) match the rear liftgate position sensor status?
Yes GO to H4
No GO to H5
H4 CHECK BATTERY VOLTAGE SUPPLY TO REAR LIFTGATE LATCH
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • Gate_Lgc_V
    • Gate_Pwr_V
  • Monitor the PID -
    • Power supply A and power supply B must be above 8.8V for unlock.
    • Power supply A and power supply B must be above 10.5V for powered operation.

Do the PIDs match the liftgate latch status?
Yes GO to H5
No REPAIR the circuit.
H5 CHECK RGTM (REAR GATE TAILGATE MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Using the diagnostic scan tool, perform the RGTM self-test.

Are any diagnostic trouble codes (DTCs) present?
Yes REFER TO the RGTM DTC Chart in this section.
No GO to H6
H6 CHECK LIFTGATE LATCH RELEASE OPERATION
  • The ignition is on.
  • Select PARK.
  • Unlock the doors using the door lock control switch.
  • Press the power liftgate front switch.

Does the liftgate latch open?
Yes GO to H7
No GO to Pinpoint Test A
H7 CHECK LIFTGATE MANUAL OPERATION OF POWER LIFTGATE SUPPORT
  • Disable the power liftgate from the message center.
  • Open and close the liftgate manually and check the liftgate for:
    • Liftgate alignment/wedge
    • Liftgate strut operation (the strut must hold or push the liftgate when opened more than halfway)
    • Power liftgate actuator (must move freely when the liftgate is opened and closed manually and be securely attached to the liftgate and bracket)
    • Power liftgate latch (must fully latch)

Does the liftgate open and close correctly?
Yes GO to Pinpoint Test B
No REPAIR as necessary.
PINPOINT TEST I: POWER LIFTGATE CLOSES (WITH CONTINUOUS CHIME) IMMEDIATELY AFTER POWER OPEN OPERATION

Normal Operation and Fault Symptoms

Refer to: Body Locks and Latches - System Operation and Component Description (501-03 Body Locks and Latches, Description and Operation).

Possible Sources

  • Excessive weight on the liftgate, such as snow, ice or a bicycle carrier
  • Rear gate strut
  • Power rear gate initialization
I1 CHECK POWER REAR GATE POSITION SENSOR
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • TAILGATE_POS
  • Monitor the PID -
    • The position counter must start at 0 when the liftgate is closed and increase when the liftgate is opened manually.

Do the parameter identifications (PIDs) match the rear liftgate position sensor status?
Yes GO to I2.
No GO to I3
I2 CHECK BATTERY VOLTAGE SUPPLY TO REAR LIFTGATE LATCH
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • Gate_Lgc_V
    • Gate_Pwr_V
  • Monitor the PID -
    • Power supply A and power supply B must be above 8.8V for unlock.
    • Power supply A and power supply B must be above 10.5V for powered operation.

Do the PIDs match the liftgate latch status?
Yes GO to I3
No REPAIR the circuit.
I3 CHECK RGTM (REAR GATE TAILGATE MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Using the diagnostic scan tool, perform the RGTM self-test.

Are any diagnostic trouble codes (DTCs) present?
Yes REFER TO the RGTM DTC Chart in this section.
No GO to I4
I4 CHECK REAR LIFTGATE STRUT SUPPORT
  • Make sure there is no excessive weight on the liftgate, such as snow, ice or a bicycle carrier.
  • Disable the power liftgate from the message center.
  • Manually operate the liftgate to make sure the rear gate strut holds the liftgate open in various positions.

Does the rear gate strut correctly hold the liftgate in the open position?
Yes GO to I5
No INSTALL a new rear liftgate strut. INITIALIZE the power liftgate.
I5 INITIALIZE POWER LIFTGATE AND RECHECK OPERATION
  • Initialize the power liftgate.
  • Operate the power liftgate using the power liftgate front switch.

Does the liftgate close with a continuous audible alert immediately after power is applied?
Yes GO to I6
No The system operates correctly. The concern may have been caused by an improperly initialized RGTM or cargo on the liftgate.
I6 CHECK RGTM (REAR GATE TAILGATE MODULE) OPERATION
  • Disconnect and inspect all RGTM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect all RGTM connectors and make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new RGTM.
Refer to: Rear Gate Tailgate Module (RGTM) (501-03 Body Locks and Latches, 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.
PINPOINT TEST J: HANDS-FREE LIFTGATE SYSTEM DOES NOT OPERATE

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Symptoms

Refer to: Body Locks and Latches - System Operation and Component Description (501-03 Body Locks and Latches, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
BCM B1495:02 Liftgate/Tailgate Hands-Free Input Sensor: General Signal Failure Sets when the BCM detects a communication failure with the hands-free liftgate activation sensors.
BCM B1495:08 Liftgate/Tailgate Hands-Free Input Sensor: Signal/Message Bus Failure Continuous on-demand DTC that sets in the BCM when invalid LIN data is received from the hands-free power liftgate module.
BCM B1495:49 Hands-Free Liftgate/Liftglass Ajar Sensor: Internal Electronic Failure This DTC sets when the BCM detects an internal electronic failure in the hands-free liftgate activation sensors.
BCM B1495:11 Liftgate/Liftglass Ajar Switch: Short to Ground Sets when the BCM detects a short to ground on the input of the hands-free power liftgate module.

Possible Sources

  • Wiring, Terminals or Connectors
  • Hands-free power liftgate module
  • Hands-free liftgate lower activation sensor
  • Hands-free liftgate upper activation sensor
  • BCM

NOTICE: Use the correct probe adapter(s) when making measurements. Using incorrect probe adapter(s) may damage the connector.

J1 CHECK THE POWER LIFTGATE LATCH POSITION SENSOR
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • TAILGATE_POS
  • Monitor the PID -
    • The position counter must start at 0 when the liftgate is closed and increase when the liftgate is opened manually.

Do the parameter identifications (PIDs) match the rear liftgate position sensor status?
Yes GO to J2
No GO to J3
J2 CHECK THE BATTERY VOLTAGE SUPPLY TO THE POWER LIFTGATE LATCH MODULE
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • Gate_Lgc_V
    • Gate_Pwr_V
  • Monitor the PID -
    • Power supply A and power supply B must be above 8.8V for unlock.
    • Power supply A and power supply B must be above 10.5V for powered operation.

Do the PIDs match the liftgate latch status?
Yes GO to J3
No REPAIR the circuit.
J3 CHECK THE POWER LIFTGATE OPERATION WITH THE EXTERIOR SWITCH
  • The ignition is on.
  • Unlock the doors using the door lock control switch.
  • Press the liftgate exterior release switch on the liftgate.

Does the power liftgate open?
Yes GO to J4
No GO to Pinpoint Test C
J4 CHECK THE LIFTGATE PASSIVE ENTRY OPERATION
  • Ignition OFF.
  • Close the liftgate.
  • Lock the doors with the RKE transmitter.
  • With a valid programmed passive key within 1 meter (3 feet) of the rear bumper, press the liftgate exterior release switch on the liftgate.

Does the power liftgate open?
Yes GO to J5
No CHECK the liftgate passive entry function.
REFER TO: Locks, Latches and Entry Systems (501-14 Door Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
J5 VERIFY THE CONCERN IS PRESENT
  • Close the liftgate.
  • With the passive key within 1 meter (3 feet) of the rear bumper, move your foot forward and then sideways (similar to a kicking motion) near the center of the rear bumper.

Does the power liftgate open?
Yes The system is operating correctly. INFORM the customer of the hands-free liftgate activation operation.
No GO to J6
J6 CHECK THE POWER LIFTGATE ACTUATOR MODULE POWER SUPPLY CIRCUIT FOR AN OPEN
  • Disconnect the power liftgate actuator module C4401.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4401-2 Ground

Is the voltage greater than 11 volts?
Yes GO to J7
No REPAIR the circuit.
J7 CHECK THE POWER LIFTGATE ACTUATOR MODULE GROUND CIRCUIT
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4401-2 C4401-3

Is the voltage greater than 11 volts?
Yes GO to J8
No REPAIR the circuit.
J8 CHECK THE BCM (BODY CONTROL MODULE) INPUT CIRCUIT FOR A SHORT TO GROUND
  • Disconnect the C2280F connector.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4401-1 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to J9
No REPAIR the circuit.
J9 CHECK THE BCM (BODY CONTROL MODULE) INPUT CIRCUIT FOR AN OPEN HANDS-FREE
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4401-1 C2280F-54

Is the resistance less than 3 ohms?
Yes GO to J10
No REPAIR the circuit.
J10 CHECK THE LIFTGATE HANDS-FREE LOWER SENSOR
  • INSTALL a new liftgate hands-free lower sensor.
    REFER TO: Liftgate Hands-Free Lower Sensor (501-03 Body Closures, Removal and Installation).
  • Check the hands-free power liftgate operation.

Does the hands-free liftgate operation work?
Yes The system is operating correctly. The concern was caused by the liftgate hands-free lower sensor.
No GO to J11
J11 CHECK THE LIFTGATE HANDS-FREE UPPER SENSOR
  • INSTALL a new hands-free upper sensor.
    REFER TO: Liftgate Hands-Free Upper Sensor (501-03 Body Closures, Removal and Installation).
  • Check the hands-free power liftgate operation.

Does the hands-free liftgate operation work?
Yes The system is operating correctly. The concern was caused by the liftgate hands-free upper sensor.
No INSTALL a new power liftgate hands-free module.
REFER TO: Power Liftgate Hands-Free Module (501-03 Body Closures, Removal and Installation). Using the diagnostic scan tool, perform the new module LIN initialization, following the on-screen instructions. GO to J12
J12 CHECK THE BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect all BCM connectors and make sure they are properly installed and latched.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new BCM. Refer to the Removal and Installation procedure in Section 419-10.
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.
PINPOINT TEST K: U0101:87

Normal Operation and Fault Symptoms

The RGTM and PCM communicate over CAN. Messages are exchanged between the modules to determine that functions are operating.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
RGTM U0101:87 Lost Communication with TCM: No Sub Type Information The RGTM sets if expected range data messages received from the PCM over CAN are missing.

Possible Sources

  • Network communication fault
  • PCM
  • RKE
K1 VERIFY THE CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to K2
No CLEAR the DTC. The system is currently operating correctly. The DTC may have been set due to high network traffic or intermittent conditions.
K2 CHECK THE COMMUNICATION NETWORK
  • Using the diagnostic scan tool, perform the network test.

Does the PCM pass the network test?
Yes GO to K3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
K3 PERFORM THE PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform the PCM self-test KOEO and KOER.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes CHECK for any non-network DTCs. REFER TO the PCM DTC Chart in the appropriate section 303-14.
No GO to K4
K4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE RGTM (REAR GATE TAILGATE MODULE) SELF-TEST
  • Review the RGTM self-test results.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes CHECK for any non-network DTCs. REFER TO the RGTM DTC Chart in this section.
No GO to K5
K5 RECHECK THE RGTM (REAR GATE TAILGATE MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the RGTM DTCs.
  • Ignition OFF.
  • The ignition is on.
  • Wait 10 seconds.
  • Using a scan tool, perform a continuous memory self-test.
  • Check the RGTM DTCs.

Is DTC U0101:87 still present?
Yes GO to K6
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.
K6 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERNS
  • Check the vehicle service history for recent service actions related to the PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • The HVBOM can be used to verify the part number is correct.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to K7
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
K7 CHECK THE PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Disconnect and inspect all PCM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect all PCM connectors and make sure they are properly seated and latched.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSBs apply to this concern,
VIN required to access Guided Routine (PCM)
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.
PINPOINT TEST L: U0140:87

Normal Operation and Fault Symptoms

The RGTM and BCM communicate over CAN. Messages are exchanged between the modules to determine that functions are operating.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
RGTM U0140:87 Lost Communication with Body Control Module: No Sub Type Information The RGTM sets if expected data messages received from the BCM over CAN are missing.

Possible Sources

  • Network communication fault
  • RKE
  • BCM
L1 VERIFY THE CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to L2
No CLEAR the DTC. The system is currently operating correctly. The DTC may have been set due to high network traffic or intermittent conditions.
L2 CHECK THE COMMUNICATION NETWORK
  • Using the diagnostic scan tool, perform the network test.

Does the BCM pass the network test?
Yes GO to L3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
L3 PERFORM THE BCM (BODY CONTROL MODULE) SELF-TEST
  • Using a scan tool, perform the BCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes CHECK all non-network Diagnostic Trouble Codes (DTCs).
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
No GO to L4
L4 RETRIEVE STORED DIAGNOSTIC TROUBLE CODES (DTCS) FROM RGTM (REAR GATE TAILGATE MODULE) SELF-TEST
  • Review the RGTM self-test results.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes CHECK for any non-network DTCs. REFER TO the RGTM DTC Chart in this section.
No GO to L5
L5 RECHECK RGTM (REAR GATE TAILGATE MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the RGTM DTCs.
  • Ignition OFF.
  • The ignition is on.
  • Wait 10 seconds.
  • Using a scan tool, perform a continuous memory self-test.
  • Check the RGTM DTCs.

IS DTC U0140:87 STILL PRESENT?
Yes GO to L6
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.
L6 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERNS
  • Check the vehicle service history for recent service actions related to the BCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • The HVBOM can be used to verify the part number is correct.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to L7
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
L7 CHECK BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect all BCM connectors and make sure they are properly installed and latched.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new BCM. Refer to the Removal and Installation procedure in Section 419-10.
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.
PINPOINT TEST M: U0294:87

Normal Operation and Fault Symptoms

The RGTM and PCM communicate over CAN. Messages are exchanged between the modules to determine that functions are operating.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
RGTM U0294:87 Lost Communication with Powertrain Control Module Monitor: No Sub Type Information Set when the RGTM does not receive expected data messages from the PCM over CAN.

Possible Sources

  • Network communication fault
  • RKE
  • PCM
M1 CHECK CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to M2
No CLEAR the DTC. The system is currently operating correctly. The DTC may have been set due to high network traffic or intermittent conditions.
M2 CHECK THE COMMUNICATION NETWORK
  • Using the diagnostic scan tool, perform the network test.

Does the PCM pass the network test?
Yes GO to M3
No
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
M3 PERFORM PCM (POWERTRAIN CONTROL MODULE) SELF-TEST
  • Using the diagnostic scan tool, perform the PCM self-test KOEO and KOER.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes CHECK for any non-network DTCs. REFER TO the PCM DTC Chart in the appropriate section 303-14.
No GO to M4
M4 RETRIEVE STORED DIAGNOSTIC TROUBLE CODES (DTCS) FROM RGTM (REAR GATE TAILGATE MODULE) SELF-TEST
  • Review the RGTM self-test results.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes CHECK for any non-network DTCs. REFER TO the RGTM DTC Chart in this section.
No GO to M5
M5 RECHECK RGTM (REAR GATE TAILGATE MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scan tool, clear the RGTM DTCs.
  • Ignition OFF.
  • The ignition is on.
  • Wait 10 seconds.
  • Using a scan tool, perform a continuous memory self-test.
  • Check the RGTM DTCs.

IS DTC U0294:87 STILL PRESENT?
Yes GO to M6
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent condition.
M6 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERNS
  • Check the vehicle service history for recent service actions related to the PCM. If recent service history is found:
    • make sure the correct replacement module was installed
      • The HVBOM can be used to verify the part number is correct.
    • make sure the replacement module configuration was correct
      • reconfigure the module using the original data if the previous configuration is suspected
    • make sure the module was not obtained from a similar vehicle and installed on the customer's vehicle
      • Reinstall the replaced module in the original vehicle and obtain a new replacement module.
  • Operate the system and determine whether the observed symptom persists.

Is the observed symptom still present?
Yes GO to M7
No The system is currently operating correctly. The concern may have been caused by incorrect part replacement procedures or incorrect module configuration.
M7 CHECK PCM (POWERTRAIN CONTROL MODULE) OPERATION
  • Disconnect and inspect all PCM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect all PCM connectors and make sure they are properly seated and latched.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSBs apply to this concern,
VIN required to access Guided Routine (PCM)
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.
PINPOINT TEST N: U3003:16

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Symptoms

The RGTM monitors its high-current power supply circuit. If a fault is detected, the RGTM disables the power liftgate function.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
RGTM U3003:16 Battery Voltage: Circuit Voltage Below Threshold Set when the RGTM detects the high-current power supply circuit voltage is less than 8.8 volts.

Possible Sources

  • High Circuit Resistance
  • Charging System Concern
  • RKE

NOTICE: Use the correct probe adapter(s) when making measurements. Using incorrect probe adapter(s) may damage the connector.

N1 CHECK BATTERY VOLTAGE SUPPLY TO THE REAR LIFT BOX CONNECTOR
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • Gate_Lgc_V
    • Gate_Pwr_V
  • Monitor the PID -
    • Power supply A and power supply B must be above 8.8 volts.

Do the PIDs match the liftgate latch status?
Yes GO to N2
No REPAIR the circuit.
N2 RECHECK RGTM (REAR GATE TAILGATE MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • The ignition is on.
  • Using a diagnostic scan tool, clear the DTCs.
  • Wait 30 seconds.
  • Using the diagnostic scan tool, perform the RGTM self-test.

IS DTC U3003:16 STILL PRESENT?
Yes GO to N3
No The system is currently operating normally. The DTC may have been set due to a previous low battery voltage condition.
N3 CHECK CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) STORED IN OTHER MODULES
  • Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is any other DTC related to the battery or charging system stored in other modules?
Yes Diagnose the charging system concern. REFER TO the appropriate diagnosis and testing in Section 414-00.
No GO to N4
N4 CHECK BATTERY CONDITION AND CHARGE
  • Ignition OFF.
  • Check the battery condition and make sure the battery is fully charged.
    REFER TO: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

Is the battery in good condition and fully charged?
Yes GO to N5
No CHECK the battery.
REFER TO: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).
N5 CHECK RGTM (REAR GATE TAILGATE MODULE) POWER_SUPPLY_POWER_VBATT (GATE_PWR_V) PID (PARAMETER IDENTIFICATION)
  • The ignition is on.
  • Measure and record the battery voltage.
  • Using a diagnostic scan tool, monitor the RGTM Gate_Pwr_V PID.

Is the voltage within 0.2 volts of the recorded battery voltage?
Yes GO to N8
No GO to N6
N6 CHECK RGTM (REAR GATE TAILGATE MODULE) POWER SUPPLY CIRCUIT FOR HIGH RESISTANCE
  • Ignition OFF.
  • Disconnect the RGTM C4174A.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4174A-2 Ground

Is the voltage within 0.2 volts of the recorded battery voltage?
Yes GO to N7
No REPAIR the circuit.
N7 CHECK RGTM (REAR GATE TAILGATE MODULE) GROUND CIRCUIT FOR HIGH RESISTANCE
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C4174A-14 Ground

Is the resistance less than 3 ohms?
Yes GO to N8
No REPAIR the circuit.
N8 CHECK RGTM (REAR GATE TAILGATE MODULE) OPERATION
  • Disconnect and inspect all RGTM connectors.
  • Repair:
    • corrosion (install new connectors or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect all RGTM connectors and make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new RGTM.
Refer to: Rear Gate Tailgate Module (RGTM) (501-03 Body Locks and Latches, 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.
PINPOINT TEST O: U3003:17

Refer to Wiring Diagrams Cell 109 for schematic and connector information.

Normal Operation and Fault Symptoms

The RGTM monitors its high-current power supply circuit. If a fault is detected, the RGTM disables the power liftgate function.

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
RGTM U3003:17 Battery Voltage: Circuit Voltage Above Threshold Set when the RGTM detects high-current power supply circuit voltage greater than 16 volts.

Possible Sources

  • Charging System Concern
  • RKE
O1 CHECK BATTERY VOLTAGE SUPPLY TO THE REAR LIFT BOX CONNECTOR
  • Using the diagnostic scan tool, view the RGTM PIDs.
    • Gate_Lgc_V
    • Gate_Pwr_V
  • Monitor the PID -
    • Power supply A and power supply B must be below 16.5 volts.

Do the PIDs match the liftgate latch status?
Yes GO to O2
No REPAIR the circuit.
O2 CHECK FOR HIGH VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS) STORED IN OTHER MODULES
  • The ignition is on.
  • Using a diagnostic scan tool, retrieve Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Are any high voltage DTCs stored in other modules?
Yes Diagnose the overcharging condition. REFER TO the appropriate diagnosis and testing in Section 414-00.
No GO to O3
O3 CHECK BATTERY VOLTAGE
  • Turn off all interior/exterior lamps and accessories.
  • Start the engine and run at approximately 2000 rpm for 3 minutes while monitoring the battery voltage.

Does the battery voltage rise to 15.5 volts or higher?
Yes Diagnose the overcharging condition. REFER TO the appropriate diagnosis and testing in Section 414-00.
No GO to O4
O4 RECHECK FOR DTC U3003:17
  • Ignition OFF.
  • The ignition is on.
  • Using a diagnostic scan tool, clear the DTCs and repeat the RGTM self-test.

IS DTC U3003:17 STILL PRESENT?
Yes INSTALL a new RGTM.
REFER TO: Rear Gate Tailgate Module (RGTM) (501-03 Body Locks, Removal and Installation).
No The system is currently operating normally. The DTC may have been set previously during battery charging or when jump-starting the vehicle.
PINPOINT TEST P: DTC B1495:55

Normal Operation and Fault Symptoms

Refer to: Body Locks and Latches - System Operation and Component Description (501-03 Body Locks and Latches, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
BCM B1495:55 Hands-Free Liftgate/Liftglass Ajar Sensor: Not Configured This DTC is set when the power liftgate hands-free module has not been programmed or is incorrectly programmed.

Possible Sources

  • Hands-free power liftgate module
P1 CHECK DTC B1495:55
  • Ignition ON
  • Using a scan tool, perform the BCM self-test.

Is DTC B1495:55 present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new BCM. Refer to the Removal and Installation procedure in Section 419-10.
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.
PINPOINT TEST Q: DTC U3000:49 OR U201A:55 OR U2300:56

Normal Operation and Fault Symptoms

Refer to: Body Locks and Latches - System Operation and Component Description (501-03 Body Locks and Latches, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
RGTM U3000:49 Control Module: Internal Electronic Failure This DTC sets when the RGTM detects an internal fault.
RGTM U201A:55 Control Module Primary Calibration Data: Not Configured This DTC sets if the RGTM has not been programmed or has been programmed incorrectly.
RGTM U2300:56 Central Configuration: Incorrect/Incompatible Configuration This DTC sets if the RGTM has not been programmed or has been programmed incorrectly.

Possible Sources

  • RKE
Q1 CHECK FOR DTCS U201A:55 OR U2300:56
  • Check the vehicle service history for recent service actions related to the RGTM.
  • Ignition ON
  • Using a diagnostic scan tool, clear the DTC.
  • Wait 10 seconds.
  • Using the diagnostic scan tool, perform the RGTM self-test.

Are DTC U3000:49 present?
Yes INSTALL a new RGTM.
REFER TO: Rear Gate Tailgate Module (RGTM) (501-03 Body Locks, Removal and Installation).
No For DTCs U201A:55 or U2300:56, GO to Q2.
Q2 INSTALL THE BCM (BODY CONTROL MODULE) PMI (PROGRAMMABLE MODULE INSTALLATION)
  • Using a diagnostic scan tool, clear the DTC.
  • Following the diagnostic scan tool instructions, INSTALL the BCM action data from the PTS.

Are DTCs U201A:55 OR U2300:56 present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this condition, STOP this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new RGTM.
REFER TO: Liftgate Module (RGTM) (501-03 Body Closing Hardware, Removal and Installation).
REFER TO: Liftgate Module (RGTM) (501-03 Body Closing Hardware, 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.
PINPOINT TEST R: POWER LIFTGATE STOPS DURING POWER OPEN OPERATION

Possible Sources

  • Mechanical Binding
  • The vehicle was started or shifted out of park during the open operation.
R1 MANUALLY OPERATE THE LIFTGATE AND CHECK FOR A MECHANICAL BIND.

Is a mechanical bind present?
Yes REPAIR as necessary.
No If no mechanical bind is found, INITIALIZE the power liftgate.
REFER TO: Power Liftgate Initialization (501-03 Body Closing, General Procedures).
PINPOINT TEST S: POWER LIFTGATE STOPS AND CHIMES IN FULLY OPEN POSITION

Normal Operation and Fault Symptoms

The power liftgate lost its fully open position due to mechanical repair (hinge adjustment, liftgate latch adjustment, liftgate motor adjusted or repaired).

Possible Sources

  • hinge adjustment,
  • Liftgate latch adjustment
  • Liftgate motor adjustment or repair
S1 MANUALLY OPERATE THE LIFTGATE AND CHECK FOR THE STOP DEVICE AND NOISE IN THE FULLY OPEN POSITION.

Is a concern present?
Yes INITIALIZE the power liftgate.
REFER TO: Power Liftgate Initialization (501-03 Body Closing, General Procedures).
No The system is currently operating normally. The power liftgate was not initialized originally.
PINPOINT TEST T: DURING OPERATION THE POWER LIFTGATE MAKES EXCESSIVE NOISE

Possible Sources

  • Mechanical Binding
  • Liftgate Alignment
T1 MANUALLY OPERATE THE LIFTGATE AND CHECK FOR EXCESSIVE NOISE DURING OPERATION.

Is a mechanical bind present?
Yes REPAIR as necessary.
No If no mechanical bind is found, ALIGN the liftgate.
REFER TO: Liftgate Alignment (501-03 Body Closing, General Procedures).

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