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Pinpoint Test AK: The PRNDL/PRNDM Indicator Is Never On Or Never Displays P

  1. Normal Operation and Fault Conditions 

    See PRNDL/PRNDM. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

    If the transmission gear display or transmission gear display mode message is missing for less than 5 seconds, the PRNDL/PRNDM display remains in the last indication state (on or off), based upon the last message received.

    If the transmission gear display or transmission gear display mode message is missing for 5 seconds or longer, the IPC defaults the PRNDL/PRNDM display off.

    Possible Sources 

    • Wiring, terminals or connectors
    • Communication concern
    • Transmission concern
    • GWM
    • PCM
    • SOBDMC (HEV)
    • IPC

    Visual Inspection and Pre-checks 

    • Verify the vehicle is not in transport mode.

  2. AK1 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST

    • Ignition ON.

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

    Are any DTCs recorded? 

    Yes  REFER to the IPC DTC Chart.
    No  GO to  AK2

  3. AK2 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  For gas engine, GO to  AK3 For HEV, GO to  AK4

  4. AK3 PERFORM THE PCM (POWERTRAIN CONTROL MODULE) SELF-TEST

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

    Are any transmission related DTCs recorded? 

    Yes  DIAGNOSE the PCM Diagnostic Trouble Codes (DTCs). REFER to the Master DTC Chart.
    No  GO to  AK5

  5. AK4 PERFORM THE SOBDMC (SECONDARY ON-BOARD DIAGNOSTIC CONTROL MODULE C) SELF-TEST

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

    Are any DTCs recorded? 

    Yes  DIAGNOSE the SOBDMC Diagnostic Trouble Codes (DTCs). REFER to the Master DTC Chart.
    No  GO to  AK5

  6. AK5 CHECK FOR CORRECT IPC (INSTRUMENT PANEL CLUSTER) OPERATION

    • Ignition OFF.

    • Disconnect and inspect the IPC connector.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Reconnect the IPC connector. Make sure it seats and latches correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new IPC. REFER to: Instrument Panel Cluster (IPC) 
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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