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Pinpoint Test H : The Analog Tachometer Is Inoperative

  1. H1 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) from the IPC self-test.

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to DTC Chart - IPC 
    No  GO to  H2

  2. H2 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  H3

  3. H3 PERFORM THE TACHOMETER ACTIVE COMMAND USING THE DIAGNOSTIC SCAN TOOL

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

    • Select the IPC tachometer (TACH_IND) PID.

    • NOTE: Make sure to set the diagnostic scan tool to 0 rpm before beginning this step.

      Command the tachometer in 10% increments while monitoring the tachometer.

    Does the tachometer increase approximately 800 rpm with each 10% increment? 

    Yes  DIAGNOSE all PCM Diagnostic Trouble Codes (DTCs). REFER to Electronic Engine Controls article .
    No  IPC Guided Routine Testing
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