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Pinpoint Test N : The Charging System Warning RTT (RECONFIGURABLE Telltale) Indicator Is Never Or Always On

  1. Normal Operation and Fault Conditions 

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

    If the battery low state of charge message is missing for less than 5 seconds, the IPC defaults the charging system warning RTT indicator to the last indication state (on or off), based upon on the last message received.

    If the battery low state of charge message is missing for 5 seconds or longer, the IPC defaults the charging system warning RTT indicator on.

    Possible Sources 

    • Charging system concern
    • Communication concern
    • BCM
    • GWM
    • IPC

  2. N1 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  N2
    No  GO to Pinpoint Test A 

  3. N2 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 IPC DTC Chart. Refer to Diagnostic Trouble Code (DTC) Chart 
    No  GO to  N3

  4. N3 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  GO to  N4

  5. N4 CHECK THE CHARGING SYSTEM OPERATION

    • Check the charging system operation.

    Does the charging system operate correctly? 

    Yes  If the charging system warning indicator is never on, the system is operating correctly at this time. If the charging system warning indicator is always on, DIAGNOSE all BCM Diagnostic Trouble Codes (DTCs). REFER to: Body Control Module (BCM) .
    No  DIAGNOSE the charging system. REFER to DIAGNOSIS AND TESTING
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