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Pinpoint Test Ad: The Lights On Indicator Is Never Or Always On

  1. Normal Operation and Fault Conditions 

    See Lights On. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

    If the park lamp status message is missing for less than 5 seconds, the IPC defaults the lights on indicator to its last indication state (on or off), based upon the last message received.

    If the park lamp status message is missing for 5 seconds or longer, the IPC defaults the lights on indicator off.

    Possible Sources 

    • Exterior lighting concern
    • Communication concern
    • GWM
    • BCM
    • IPC

  2. AD1 CHECK THE PARKING LAMPS OPERATION

    • Place the headlamp switch in the PARKLAMP position.

    • Ignition ON.

    • Observe the parking lamps.

    Do the parking lights operate correctly? 

    Yes  GO to  AD2
    No  REFER to: Parking, Rear and License Plate Lamps .

  3. AD2 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) INDICATOR LAMP CONTROL ACTIVE COMMAND

    • Using a diagnostic scan tool, view the IPC Parameter Identifications (PIDs).

    • Access the IPC and control the SIDELIGHT_LMPPID

    • Command the lights on indicator on and off while observing the indicator.

    Does the lights on indicator illuminate when commanded on and turn off when commanded off? 

    Yes  GO to  AD3
    No  GO to  AD5

  4. AD3 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST

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

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to the Diagnostic Trouble Code (DTC) Chart .
    No  GO to  AD4

  5. AD4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (DTCs).

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to: Controller Area Network (CAN) Module Communications Network .
    No  DIAGNOSE all BCM Diagnostic Trouble Codes (DTCs). REFER to the Diagnostic Trouble Code (DTC) Chart .

  6. AD5 CHECK FOR CORRECT IPC (INSTRUMENT PANEL CLUSTER) OPERATION

    • Ignition OFF.

    • Disconnect and inspect the IPC connector.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Reconnect the IPC connector. Make sure it seats and latches correctly.

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

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new IPC. REFER to: Instrument Panel Cluster (IPC) .
    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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