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Pinpoint Test AY: Invalid Data Concerns

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
  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 Wiring Diagrams SUPPLEMENTAL RESTRAINT SYSTEM for schematic and connector information.

    Normal Operation and Fault Conditions 

    REFER to: Airbag and Seatbelt Pretensioner Supplemental Restraint System (SRS) - System Operation and Component Description .

    The RCM receives a configuration data message from the BCM when the RCM proves out during the very first ignition cycle after it is installed. During prove-out at the beginning of each subsequent ignition cycle, the BCM sends configuration data to the RCM and the RCM compares the message to the message that was received during the very first ignition cycle.

    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 U0415:00 Invalid Data Received from Anti-Lock Brake System (ABS) Control Module "A": No Sub Type Information This DTC sets if the RCM does not receive an expected message from the ABS control module.
    RCM U0415:81 Invalid Data Received from Anti-Lock Brake System (ABS) Control Module "A": Invalid Serial Data Received This DTC sets if the RCM does not receive an expected message from the ABS control module.
    RCM U0420:00 Invalid Data Received from Power Steering Control Module "A": No Sub Type Information This DTC sets if the RCM does not receive an expected message from the BCM.
    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 U053C:00 Invalid Data Received From Image Processing Module B: No Sub Type Information This DTC sets if the RCM does not receive an expected message from the IPMB.
    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
    RCM U0557:82 Invalid Data Received From Front Controls Interface Module "A": Alive/Sequence Counter Incorrect/Not Updated This DTC sets if the RCM does not receive an expected message from the FCIM

    Possible Sources 

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

  6. AY1 RETRIEVE ALL CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS) IN ALL MODULES

    WARNING: Before beginning any service procedure In this article, refer to Safety warnings in General Information. Failure to follow this instruction may result in serious personal injury.

    • Ignition ON.

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

    • 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 BCM Diagnostic Trouble Codes (DTCs), REFER to: Body Control Module (BCM) . For PCM Diagnostic Trouble Codes (DTCs), Refer to the appropriate Engine System article for the procedure. For APIM Diagnostic Trouble Codes (DTCs), REFER to: Information and Entertainment System . For other RCM Diagnostic Trouble Codes (DTCs), REFER to the RCMDTC Chart In this article.
    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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