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Pinpoint Test G : U0146

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

  1. G1 CHECK THE COMMUNICATION NETWORK

    • Ignition ON.

    • Using a diagnostic scan tool, carry out the Network Test.

    Does the GWM pass the Network Test? 

    Yes  GO to  G2
    No  DIAGNOSE the GWM does not respond to the scan tool. REFER to: Communications Network .

  2. G2 RECHECK THE RBM (RUNNING BOARD CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS).

    • Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).

    • Ignition OFF.

    • Ignition ON.

    • Using a diagnostic scan tool, carry out the RBM self-test.

    Is DTC U0146:00 retrieved again? 

    Yes  GO to  G3
    No  The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

  3. G3 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, check GWM Diagnostic Trouble Codes (DTCs).

    Are any Diagnostic Trouble Codes (DTCS) present in the GWM? 

    Yes  DIAGNOSE the GWM Diagnostic Trouble Codes (DTCS). REFER to: Communications Network .
    No  GO to  G4

  4. G4 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0146:00 SET IN OTHER MODULES

    • Using a diagnostic scan tool, carry out the self-test to retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

    Is DTC U0146:00 set in other modules? 

    Yes  GO to  G5
    No  GO to  G6

  5. G5 CHECK FOR CORRECT GWM (GATEWAY MODULE A) OPERATION

    • Ignition OFF.

    • Disconnect All GWM and related in-line connectors.

    • Check for:

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

    • Connect all GWM system and related in-line connectors and make sure they seat correctly.

    • Operate the system and verify the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new GWM. REFER to: Gateway Module A (GWM) .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

  6. G6 CHECK FOR CORRECT RBM (RUNNING BOARD CONTROL MODULE) OPERATION

    • Ignition OFF.

    • Disconnect All PRB system and related in-line connectors.

    • Check for:

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

    • Connect all PRB system and related in-line connectors and make sure they seat correctly.

    • Operate the system and verify the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RBM. REFER to: Running Board Control Module (RBM) .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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