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Pinpoint Test K : The Analog Temperature Gauge Is Inoperative

  1. Normal Operation and Fault Conditions 

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

    If the IPC does not receive the engine coolant temperature data message or if the engine coolant temperature data message is deemed invalid from the PCM for more than 5 seconds, the IPC defaults the temperature gauge to cold (C).

    Possible Sources 

    • Communication concern
    • PCM
    • GWM
    • IPC

  2. K1 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST

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

    • Check for recorded Diagnostic Trouble Codes (DTCs).

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to the DTC Chart: IPC .
    No  GO to  K2

  3. K2 PERFORM THE TEMPERATURE GAUGE ACTIVE COMMAND

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

    • Access the IPC and control the ENGCOOLNT (%) PID

    • NOTE: Make sure to set the scan tool to 0 or full cold before beginning this step.

      Command the temperature gauge on and off while monitoring the temperature gauge.

    Does the temperature gauge start at cold (C), move to full hot (H) and return to cold (C)? 

    Yes  GO to  K3
    No  Refer to IPC Guided Routine Testing .

  4. K3 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 PCM Diagnostic Trouble Codes (DTCs). REFER to the appropriate Electronic Engine Controls article.
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