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HOMESERVICE MANUALSFORD2021BRONCO BASE, 2D UTILITY, 2.3L ENG VIN H, PART TIME T/CASE CONTROL, STANDARD TRANSREPAIR AND DIAGNOSISRESTRAINTSAIR BAG, SRSSUPPLEMENTAL RESTRAINT SYSTEM - PINPOINT TESTS AA - AZPINPOINT TEST AS: U0154:00
2021 Ford Bronco Base, 2D Utility, 2.3L Eng VIN H, Part Time T/Case Control, Standard Trans

Pinpoint Test As: U0154:00

2021 Ford Bronco Base, 2D Utility, 2.3L Eng VIN H, Part Time T/Case Control, Standard TransSECTION Pinpoint Test As: U0154:00
  1. Normal Operation and Fault Conditions 

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

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    RCM U0154:00 Lost Communication with Restraints Occupant Classification System Module "A": No Sub Type Information This DTC sets if the RCM does not receive an expected message from the OCSM.

    Possible Sources 

    • Network traffic
    • OCSM
    • RCM

  2. WARNING: Do not handle, move or change the original horizontal mounting position of the Restraints Control Module (RCM) while the Restraints Control Module (RCM) is connected and the ignition switch is ON. Failure to follow this instruction may result in the accidental deployment of the Safety Canopy® and cause serious personal injury or death.
  3. NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
  4. NOTE: SRS components should only be disconnected or reconnected when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS.
  5. 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 to make sure the correct component is being installed. If an incorrect SRS component is installed, Diagnostic Trouble Codes (DTCs) may set.
  6. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

  7. AS1 CHECK THE COMMUNICATION NETWORK

    • Ignition ON.

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

    Does the OCSM pass the network test? 

    Yes  GO to  AS2
    No  To diagnose no communication with the OCSM, REFER to: Controller Area Network (CAN) Module Communications Network .

  8. AS2 CHECK THE RCM (RESTRAINTS CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CM DTCS)

    • Ignition ON.

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

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

    • Wait 10 seconds.

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

    Is DTC U0154:00 retrieved again? 

    Yes  GO to  AS3
    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.

  9. AS3 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  GO to Pinpoint Test AZ 
    No  GO to  AS4

  10. AS4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE OCSM (OCCUPANT CLASSIFICATION SYSTEM MODULE) SELF-TEST

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

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

    Is DTC U3003:16 or U3003:17 recorded? 

    Yes  GO to Pinpoint Test AZ 
    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 RCM. REFER to: Restraints Control Module (RCM) . REPEAT the RCM self-test. If DTC U0154:00 returns, INSTALL a new OCS sensor. REFER to: Occupant Classification System (OCS) Sensor .
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.