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Pinpoint Test AP: The ECO Coach Display Is Inoperative

  1. Normal Operation and Fault Conditions 

    See Eco Coach Display. REFER to: Message Center - System Operation and Component Description .

    Possible Sources 

    • Communication concern
    • PCM concern
    • IPC

  2. AP1 VERIFY THE SPEEDOMETER OPERATION

    • Observe the speedometer while operating at various speeds and stopping frequently.

    Does the speedometer begin at 0 km/h (0 mph) and fully return to the 0 km/h (0 mph) position when the vehicle is stopped? 

    Yes  GO to  AP2
    No  GO to Pinpoint Test D 

  3. AP2 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 Diagnostic Trouble Code (DTC) Chart .
    No  GO to  AP3

  4. AP3 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

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

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

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