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Pinpoint Test C: The Power Tailgate Is Inoperative From One Of The Power Tailgate Control Switches

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to POWER TAILGATE/RETRACTABLE RUNNING BOARDS for schematic and connector information.

    Normal Operation and Fault Conditions 

    REFER to: Power Tailgate - System Operation and Component Description .

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    RGTM B12E8:23 Liftgate/Tailgate Control/Release Switch: Signal Stuck Low Sets when the RGTM detects a short to ground from the front power tailgate release switch input circuit.
    RGTM B144C:23 Tailgate/Liftgate/Boot/Trunk Outer Handle Switch: Signal Stuck Low Sets when the RGTM detects a short to ground from the exterior tailgate release switch input circuit.

    Possible Sources 

    • Wiring, terminals or connectors
    • Front interior power tailgate switch
    • Exterior tailgate release switch
    • BCM
    • RGTM

  2. NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  3. NOTE: If the concern is with the exterior tailgate release switch, verify the concern is not passive entry related. If the tailgate opens from the tailgate release switch after the vehicle has been electronically unlocked but does not open from the tailgate release switch when the vehicle is locked, the concern is not with the power tailgate system.

  4. C1 CHECK THE OPERATION OF THE POWER TAILGATE FROM ALL THE SWITCH INPUTS

    • Ignition OFF.

    • Select PARK.

    • Ignition ON.

    • Close the tailgate (manually if necessary).

    • Unlock the doors using the door lock control switch.

    • Open and close the power tailgate using the front interior power tailgate switch (located on the instrument panel).

    • Open the power tailgate using the exterior tailgate release switch.

    Does the power tailgate open or close from any input? 

    Yes  GO to  C2
    No  GO to Pinpoint Test B 

  5. C2 CHECK THE RGTM (REAR GATE TRUNK MODULE) POWER TAILGATE SWITCH PARAMETER IDENTIFICATIONS (PIDS)

    • Using a diagnostic scan tool, view the RGTMPID.

    • Using a diagnostic scan tool, monitor the following RGTMPID:

      • Access the RGTM and monitor the TAILGATE_LCK_SW_INPPID
      • Access the RGTM and monitor the TAILGATE_REL_SWPID

    • Using a diagnostic scan tool, monitor the following RGTMPID:

    Do any of the PIDs indicate a switch is pressed? 

    Yes  GO to  C3
    No  GO to  C6

  6. C3 ISOLATE THE SUSPECT POWER TAILGATE SWITCH FOR A SHORT TO GROUND USING THE TAILGATE SWITCH PID (PARAMETER IDENTIFICATION)

    • Ignition OFF.

    • Disconnect: the suspect power tailgate switch.

    • Ignition ON.

    • Using a diagnostic scan tool, monitor the following RGTMPID:

      • Access the RGTM and monitor the TAILGATE_LCK_SW_INPPID
      • Access the RGTM and monitor the TAILGATE_REL_SWPID

    Does the PID in question continue to indicate a switch is pressed? 

    Yes  GO to  C4
    No  INSTALL a new power tailgate switch in question. REFER to: Tailgate Release Switch .

  7. C4 ISOLATE THE BCM (BODY CONTROL MODULE) FOR A SHORT TO GROUND WHILE CHECKING THE RGTM (REAR GATE TRUNK MODULE) HANDLE_SIGNAL (HANDLE_SIG) PID (PARAMETER IDENTIFICATION)

    • Ignition OFF.

    • Disconnect: BCM connector C2280B (interior switch) or C2280E (exterior switch).

    • Ignition ON.

    • Using a diagnostic scan tool, monitor the RGTM.

      • Access the RGTM and monitor the TAILGATE_LCK_SW_INPPID
      • Access the RGTM and monitor the TAILGATE_REL_SWPID

    Does the PID continue to indicate the switch is pressed? 

    Yes  GO to  C5
    No  GO to  C9

  8. C5 CHECK THE SUSPECT POWER TAILGATE SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Disconnect: RGTM C4623.

    • Measure:

      Front Interior Power Tailgate Switch 

      Positive Lead Measurement / Action Negative Lead
      C4623-12
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 Ground

      Exterior Tailgate Release Switch 

      Positive Lead Measurement / Action Negative Lead
      C4623-10
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  C10
    No  REPAIR the circuit.

  9. C6 BYPASS THE SUSPECT POWER TAILGATE SWITCH

    • Ignition OFF.

    • Disconnect: the suspect power tailgate switch.

    • Unlock the doors using the door lock control switch.

    • NOTE: The tailgate must be open when carrying out this step if the rear interior power tailgate switch is the suspect component.

      For the suspect power tailgate switch, connect:

      Front Interior Tailgate Switch 

      Positive Lead Measurement / Action Negative Lead
      C2834-2
      GFD560557Courtesy of FORD MOTOR COMPANY
      		 C2834-3

      Exterior Tailgate Release Switch 

      Positive Lead Measurement / Action Negative Lead
      C4499-1
      GFD560557Courtesy of FORD MOTOR COMPANY
      		 C4499-2

    • Remove the fused jumper wire.

    Does the tailgate open or close? 

    Yes  INSTALL a new power tailgate switch in question. REFER to: Tailgate Release Switch .
    No  GO to  C7

  10. C7 CHECK THE POWER TAILGATE SWITCH GROUND CIRCUIT FOR AN OPEN

    • For the suspect power tailgate switch, connect:

      Front Interior Tailgate Switch 

      Positive Lead Measurement / Action Negative Lead
      C2834-2
      GFD560557Courtesy of FORD MOTOR COMPANY
      		 C4623-12

      Exterior Tailgate Release Switch 

      Positive Lead Measurement / Action Negative Lead
      C4499-1
      GFD560557Courtesy of FORD MOTOR COMPANY
      		 C4623-10

    • Remove the fused jumper wire.

    Does the tailgate open or close? 

    Yes  REPAIR the circuit.
    No  GO to  C8

  11. C8 CHECK THE POWER TAILGATE SWITCH INPUT CIRCUIT FOR AN OPEN

    • Disconnect: RGTM C4623.

    • For the suspect tailgate switch, measure:

      Front Interior Tailgate Switch 

      Positive Lead Measurement / Action Negative Lead
      C2834-2
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 C4623-12

      Exterior Tailgate Release Switch 

      Positive Lead Measurement / Action Negative Lead
      C4499-1
      GFD560559Courtesy of FORD MOTOR COMPANY
      		 C4623-10

    Is the resistance less than 3 ohms? 

    Yes  GO to  C10
    No  REPAIR the circuit.

  12. C9 CHECK FOR CORRECT 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
      • pushed-out pins - install new pins as necessary

    • Reconnect all the BCM connectors and make sure they seat and latch correctly.

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

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, REFER to: Body Control Module (BCM) .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

  13. C10 CHECK FOR CORRECT RGTM (REAR GATE TRUNK 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
      • pushed-out pins - install new pins as necessary

    • Reconnect all the RGTM connectors and make sure they seat and latch correctly.

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

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new RGTM. REFER to: Rear Gate Trunk Module (RGTM) .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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