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Pinpoint Test C: The Virtual Speedometer, Tachometer Or Temperature Gauge Is Inoperative (Digital IPC (Instrument Panel Cluster) Only)

  1. Normal Operation and Fault Conditions 

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

    Speedometer 

    • If the vehicle speed message is missing or invalid for less than 5 seconds, the IPC defaults the speedometer to the last indication state, based upon the last message received.
    • If the vehicle speed message is missing or invalid for 5 seconds or longer, the IPC defaults the speedometer to 0 km/h (0 mph).

    Tachometer 

    • If the engine rpm data message is missing for less than 5 seconds, the IPC defaults the tachometer to the last indication state, based upon the last message received.
    • If the engine rpm data message is missing for 5 seconds or longer, the IPC defaults the tachometer to 0 rpm.

    Temperature Gauge 

    • If the engine coolant temperature data, engine overheat indication request, heater core temperature or engine off temperature data messages are missing for less than 5 seconds, the IPC defaults the temperature gauge to the last indication state, based upon the last message received.
    • If the engine coolant temperature data, engine overheat indication request, heater core temperature or engine off temperature data messages are missing for 5 seconds or longer, the IPC defaults the temperature gauge to the full hot position.

    Possible Sources 

    • Communication concern
    • BCM input concern
    • PCM input concern
    • IPC

  2. C1 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: Instrument Panel Cluster (IPC) .
    No  GO to  C2

  3. C2 PERFORM THE PCM (POWERTRAIN CONTROL MODULE) SELF-TEST

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

    • Check for recorded Diagnostic Trouble Codes (DTCs).

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to the appropriate Electronic Engine Controls article.
    No  GO to  C3

  4. C3 PERFORM THE BCM (BODY CONTROL MODULE) SELF-TEST

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

    • Check for recorded Diagnostic Trouble Codes (DTCs) from the BCM self-test.

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to: Body Control Module B (BCMB)
    No  GO to  C4

  5. C4 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: Communications Network
    No  INSTALL a new IPC. Refer to Instrument Panel Cluster (IPC) .
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