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Pinpoint Test AU: RCM (Restraints Control Module) Invalid Data Concerns

  1. NOTE: This DTC sets in a module that is reporting a missing or invalid message from another module on the data bus. The module that reports the fault is not the problem module. Do not install a new RCM as part of the repair unless directed to do so in a pinpoint test.

    Refer to SUPPLEMENTAL RESTRAINT SYSTEM for schematic and connector information.

    Normal Operation and Fault Conditions 

    The RCM receives data messages from other modules on the HS-CAN. If the RCM does not receive an expected message a DTC will be set.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    RCM U0401:00 Invalid Data Received from ECM/PCM A: No Sub Type Information This DTC sets if the RCM does not receive an expected message from the PCM.
    RCM U0401:81 Invalid Data Received from ECM/PCM A: Invalid Serial Data Received This DTC sets if the RCM does not receive an expected message from the PCM
    RCM U0422:00 Invalid Data Received From Body Control Module: No Sub Type Information This DTC sets if the RCM does not receive an expected message from the BCM.
    RCM U0422:56 Invalid Data Received From Body Control Module: Invalid/Incompatible Configuration This DTC sets if the RCM does not receive an expected message from the BCM.
    RCM U0422:81 Invalid Data Received From Body Control Module: Invalid Serial Data Received This DTC sets if the RCM does not receive an expected message from the BCM.
    RCM U0422:92 Invalid Data Received From Body Control Module: Performance Or Incorrect Operation This DTC sets if the RCM does not receive an expected message from the BCM.
    RCM U0455:81 Invalid Data Received From Restraints Occupant Classification System Module "A": Invalid Serial Data Received This DTC sets if the RCM does not receive an expected message from the OCSM.
    RCM U049A:00 Invalid Data Received From "Door Control Module A": No Sub Type Information This DTC sets if the RCM does not receive an expected message from the DDM
    RCM U049A:81 Invalid Data Received From "Door Control Module A": Invalid Serial Data Received This DTC sets if the RCM does not receive an expected message from the DDM
    RCM U049A:82 Invalid Data Received From "Door Control Module A": Alive/Sequence Counter Incorrect/Not Updated This DTC sets if the RCM does not receive an expected message from the DDM
    RCM U0501:00 Invalid Data Received From "Door Control Module B": No Sub Type Information This DTC sets if the RCM does not receive an expected message from the PDM
    RCM U0501:81 Invalid Data Received From "Door Control Module B": Invalid Serial Data Received This DTC sets if the RCM does not receive an expected message from the PDM
    RCM U0501:82 Invalid Data Received From "Door Control Module B": Alive/Sequence Counter Incorrect/Not Updated This DTC sets if the RCM does not receive an expected message from the PDM
    RCM U0554:00 Invalid Data Received From Accessory Protocol Interface Module: No Sub Type Information This DTC sets if the RCM does not receive an expected message from the APIM

    Possible Sources 

    • APIM
    • BCM
    • DDM
    • PCM
    • PDM
    • 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: 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.
  4. 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.
  5. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

  6. AU1 RETRIEVE ALL CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CM DTCS) IN ALL MODULES

    • Ignition ON.

    • Using a diagnostic scan tool, retrieve ALL Continuous Memory Diagnostic Trouble Codes (CM DTCs).

    • Record the Diagnostic Trouble Codes (DTCs) that were retrieved.

    Are any Diagnostic Trouble Codes (DTCs) other than the RCM invalid Data Diagnostic Trouble Codes (DTCs) retrieved? 

    Yes  For APIM Diagnostic Trouble Codes (DTCs), REFER to: Information and Entertainment System . . For BCM Diagnostic Trouble Codes (DTCs), REFER to: Body Control Module (BCM) . . For DDM or PDM Diagnostic Trouble Codes (DTCs), REFER to: Locks, Latches and Entry Systems . For PCM Diagnostic Trouble Codes (DTCs), Refer to the appropriate Engine service information for the procedure. For other RCM Diagnostic Trouble Codes (DTCs), REFER to the Diagnostic Trouble Code (DTC) Chart .
    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.
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