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Pinpoint Test Ab : 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 or RTT 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 or RTT indicator off.

    Possible Sources 

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

  2. AB1 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  AB2
    No  REFER to: Parking, Rear and License Plate Lamps .

  3. AB2 IDENTIFY THE IPC (INSTRUMENT PANEL CLUSTER) LEVEL

    Is the vehicle equipped with a base IPC? 

    Yes  GO to  AB4
    No  GO to  AB3

  4. AB3 CHECK THE MESSAGE CENTER OPERATION

    • Ignition ON.

    • Close all doors, liftgate and hood.

    • Clear all message center warnings by pressing the OK button for each warning present.

    • Monitor the door ajar RTT warning indicator.

    • Open the driver door.

    • Clear the message center popup warning.

    • Monitor the door ajar RTT warning indicator.

    Is the door ajar RTT warning indicator off with the door closed, and on with the door open? 

    Yes  GO to  AB5
    No  GO to Pinpoint Test A 

  5. AB4 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  AB5
    No  Refer to IPC Guided Routine Testing .

  6. AB5 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 DTC Chart: IPC .
    No  GO to  AB6

  7. AB6 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: Communications Network .
    No  DIAGNOSE all BCM Diagnostic Trouble Codes (DTCs). REFER to the Master DTC Chart.
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