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Pinpoint Test AR - DTC: U0146:00

Normal Operation and Fault Conditions 

The RCM uses information contained in messages from the GWM sent on the HS-CAN2.

DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
U0146:00 Lost Communication with Gateway "A": No Sub Type Information This DTC sets if the RCM does not receive an expected message from the GWM for 6 seconds.

Possible Causes 

PINPOINT TEST A: U0146:00 

  1. NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
  2. NOTE: Only disconnect or reconnect SRS components when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS.
  3. NOTE: Always make sure the correct SRS component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford parts catalog to make sure the correct component is being installed. If an incorrect SRS component is installed, Diagnostic Trouble Codes (DTCs) may set.
  4. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

  5. A1 CHECK THE COMMUNICATION NETWORK

    • Ignition ON.

    • Using a diagnostic scan tool, carry out a network test.

    Does the BCM pass the network test? 

    Yes  GO to  A2
    No  To diagnose no communication with the BCM, REFER to: Communications Network .

  6. A2 CHECK THE RCM (RESTRAINTS CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

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

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

    • Wait 10 seconds.

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

    Is DTC U0146:00 retrieved again? 

    Yes  GO to  A3
    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.

  7. A3 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE RCM (RESTRAINTS CONTROL MODULE) SELF-TEST

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

    Is DTC U3003:16 or U3003:17 recorded? 

    Yes  REFER to: Pinpoint Test - DTC: AF .
    No  GO to  A4

  8. A4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE GWM (GATEWAY MODULE A) SELF-TEST

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

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

    Is DTC U3003:16 or U3003:17 recorded? 

    Yes  REFER to: Communications Network .
    No  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 GWM. REFER to the appropriate procedure in the appropriate Service Information . REPEAT the RCM self-test. If DTC U0146:00 returns, INSTALL a new RCM. REFER to: Restraints Control Module (RCM)  .
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