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Home >> Ford >> 2023 >> Mustang Mach-E Select, RWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System - Pinpoint Tests Aa - AZ >> Pinpoint Test Ac: B0054:11, B0054:12, B0054:13 And B0054:1D

Pinpoint Test Ac: B0054:11, B0054:12, B0054:13 And B0054:1D

  1. Refer to SUPPLEMENTAL RESTRAINT SYSTEM for schematic and connector information.

    Normal Operation and Fault Conditions 

    The RCM monitors the second row center seatbelt buckle sensor circuits for the following faults:

    • Open circuit
    • Short to voltage
    • Short to ground
    • Current out of range
    • Faulted center rear seatbelt buckle sensor

    If a fault is detected, the RCM stores DTC B0054:11, B0054:12, B0054:13 or B0054:1D in memory and sends a message to the IPC to illuminate the airbag warning indicator.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    RCM B0054:11 Second Row Center Seatbelt Sensor: Circuit Short To Ground A fault is indicated when the RCM senses a short to ground on the center rear seatbelt buckle sensor circuit.
    RCM B0054:12 Second Row Center Seatbelt Sensor: Circuit Short To Battery A fault is indicated when the RCM senses a short to voltage on the center rear seatbelt buckle sensor circuit.
    RCM B0054:13 Second Row Center Seatbelt Sensor: Circuit Open A fault is indicated when the RCM senses an open on either center rear seatbelt buckle sensor circuit.
    RCM B0054:1D Second Row Center Seatbelt Sensor: Circuit Current Out Of Range A fault is indicated when the RCM senses current out of an acceptable range between the center rear seatbelt buckle sensor circuits.

    Possible Sources 

    • Wiring, terminals or connectors
    • Center rear seatbelt buckle
    • RCM

    WARNING: Incorrect repair techniques or actions can cause an accidental Supplemental Restraint System (SRS) deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.
    NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
    NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
    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.
    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.
    NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

  2. AC1 RETRIEVE RCM (RESTRAINTS CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

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

    REFER to: Pyrotechnic Device Health and Safety Precautions .

    • Ignition ON.

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

    Was DTC B0054:11, B0054:12, B0054:13 or B0054:1D retrieved on-demand during self-test? 

    Yes  This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test.For DTC B0054:11 or B0054:1D, GO to AC2 For DTC B0054:12, GO to AC4 For DTC B0054:13, GO to AC5 
    No  This is an intermittent fault when present as a CMDTC only. GO to AC10 

  3. AC2 CHECK THE CENTER REAR SEATBELT SENSOR DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE (SHORT TO GROUND OR CURRENT OUT OF RANGE INDICATED)

    NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the reported fault changes, this indicates the RCM is functioning correctly and is not the source of the fault.

    • Ignition OFF.

    • Disconnect Second Row Center Seatbelt Buckle C3808.

    • Ignition ON.

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

    • DIAGNOSTIC TIP: 

      When viewing Diagnostic Trouble Codes (DTCs) with the center rear seatbelt buckle sensor disconnected, an open circuit fault is normally retrieved. Due to the inline connector being disconnected, a fault is also normally retrieved for the center rear seat position sensor and center rear side airbag circuits.

    Did the on-demand DTC change from B0054:11 or B0054:1D to B0054:13? 

    Yes  GO to AC8 
    No  For DTC B0054:11, GO to AC3 For DTC B0054:1D, GO to AC9 

  4. AC3 CHECK THE CENTER REAR SEATBELT BUCKLE SWITCH CIRCUIT FOR A SHORT TO GROUND

    • Ignition OFF.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3808 Pin 3
      GFD769505Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to AC9 
    No  REPAIR the circuit. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to AC11 

  5. AC4 CHECK THE CENTER REAR SEATBELT BUCKLE SWITCH CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect Second Row Center Seatbelt Buckle C3808.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3808 Pin 3
      GFD769508Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to AC11 
    No  GO to AC9 

  6. AC5 CHECK THE CENTER REAR SEATBELT SENSOR DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE (OPEN INDICATED)

    NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the reported fault changes, this indicates the RCM is functioning correctly and is not the source of the fault.

    • Ignition OFF.

    • Disconnect Second Row Center Seatbelt Buckle C3808.

    • Connect a fused jumper wire:
      Lead 1 Measurement / Action Lead 2
      C3808 Pin 3
      GFD769507Courtesy of FORD MOTOR COMPANY
      		 C3808 Pin 4

    • Ignition ON.

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

    • DIAGNOSTIC TIP: 

      When viewing Diagnostic Trouble Codes (DTCs) with the center rear seatbelt buckle sensor circuits shorted together, a short to ground fault is normally retrieved. Due to the inline connector being disconnected, a fault is also normally retrieved for the center rear seat position sensor and center rear side airbag circuits.

    Did the on-demand DTC change from B0054:13 to B0054:11? 

    Yes  REMOVE the fused jumper wire and GO to AC8 
    No  REMOVE the fused jumper wire and GO to AC6 

  7. AC6 CHECK THE CENTER REAR SEATBELT BUCKLE SENSOR CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C310B Pin 57
      GFD769505Courtesy of FORD MOTOR COMPANY
      		 C3808 Pin 3

    Is the resistance less than 0.5 ohm? 

    Yes  GO to AC7 
    No  REPAIR the circuit. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to AC11 

  8. AC7 CHECK THE CENTER REAR SEATBELT BUCKLE SENSOR GROUND CIRCUIT FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C310B Pin 53
      GFD769505Courtesy of FORD MOTOR COMPANY
      		 C3808 Pin 4

    Is the resistance less than 3 ohms? 

    Yes  GO to AC9 
    No  REPAIR the circuit. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to AC11 

  9. AC8 CONFIRM THE CENTER REAR SEATBELT BUCKLE SENSOR FAULT

    NOTE: Make sure all SRS components and the RCM electrical connectors are connected before carrying out the self-test. If not, Diagnostic Trouble Codes (DTCs) will be recorded.

    • Ignition OFF.

    • Prior to reconnecting any previously disconnected SRS component:

      • inspect connector(s) (including any inline connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
      • inspect wire harness for any damaged, pinched, cut or pierced wires.
      • inspect RCM C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation.
      • repair any concerns found. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information.

    • Connect Second Row Center Seatbelt Buckle C3808.

    • Ignition ON.

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

    Was the original DTC retrieved on-demand during self-test? 

    Yes  INSTALL a new center rear seatbelt buckle. REFER to: Rear Seatbelt Buckle RH and Center . GO to AC11 
    No  In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. GO to AC10 

  10. AC9 CONFIRM THE RCM (RESTRAINTS CONTROL MODULE) FAULT

    NOTE: Make sure all SRS components and the RCM electrical connectors are connected before carrying out the self-test. If not, Diagnostic Trouble Codes (DTCs) will be recorded.

    • Ignition OFF.

    • Prior to reconnecting any previously disconnected SRS component:

      • inspect connector(s) (including any inline connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
      • inspect wire harness for any damaged, pinched, cut or pierced wires.
      • inspect RCM C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation.
      • repair any concerns found. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information.

    • Connect Second Row Center Seatbelt Buckle C3808.

    • Ignition ON.

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

    Was the original DTC retrieved on-demand during self-test? 

    Yes  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) . GO to AC11 
    No  In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. GO to AC10 

  11. AC10 CHECK FOR AN INTERMITTENT FAULT

    • Ignition OFF.

    • Disconnect Second Row Center Seatbelt Buckle C3808.

      • Inspect connector(s) (including any inline connectors) for corrosion, loose or spread terminals and loose or frayed wire connections at terminals.
      • Inspect wire harness for any damage, pinched, cut or pierced wires.
      • Repair any concerns found. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information.

    • Inspect RCM C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation.

    • Connect all  previously disconnected component(s) and connector(s).

    • Ignition ON.

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

    Was DTC B0054:11, B0054:12, B0054:13 or B0054:1D retrieved on-demand during self-test? 

    Yes  This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test.For DTC B0054:11 or B0054:1D, GO to AC2 For DTC B0054:12, GO to AC4 For DTC B0054:13, GO to AC5 
    No  The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. GO to AC11 

  12. AC11 CHECK FOR ADDITIONAL SRS (SUPPLEMENTAL RESTRAINT SYSTEM) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition OFF.

    • Connect all  previously disconnected SRS components.

    • Ignition ON.

    • Using a diagnostic scan tool, perform

      Restraints  self-test.

    Are any RCM or OCSM Diagnostic Trouble Codes (DTCs) retrieved on-demand during self-test? 

    Yes  Do not clear any Diagnostic Trouble Codes (DTCs) until all 
    Diagnostic Trouble Codes (DTCs) have been resolved. DIAGNOSE and REPAIR the SRS Diagnostic Trouble Codes (DTCs). REFER to Diagnostic Trouble Code (DTC) Chart
    No  The repair is complete. RETURN the vehicle to the customer.
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