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Home >> Ford >> 2023 >> Mustang Mach-E Select, RWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System - Pinpoint Tests BA - BS >> Pinpoint Test Bk: B00A0:11, B00A0:12, B1123:11, B1123:12

Pinpoint Test Bk: B00A0:11, B00A0:12, B1123:11, B1123:12

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

    Normal Operation and Fault Conditions 

    The BECMB provides battery voltage to the RCM, OCSM and the PAD Indicator. The BECMB monitors each circuit for a short to voltage or a short to ground.

    If a fault is detected, the BECMB stores the appropriate DTC in memory and sends a message to the RCM through the GWM indicating that a BECMB fault is present. Upon receipt of this message, the RCM sets DTC U0413:92 and sends a message to the IPC to illuminate the airbag warning indicator.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    BECMB B00A0:11 Occupant Classification System: Circuit Short To Ground A fault is indicated when the BECMB senses a short to ground on the OCSM voltage supply circuit.
    BECMB B00A0:12 Occupant Classification System: Circuit Short To Battery A fault is indicated when the BECMB senses a short to voltage on the OCSM voltage supply circuit.
    BECMB B1123:11 Restraints Ignition relay: Circuit Short To Ground A fault is indicated when the BECMB senses a short to ground on the RCM voltage supply circuit.
    BECMB B1123:12 Restraints Ignition relay: Circuit Short To Battery A fault is indicated when the BECMB senses a short to voltage on the RCM voltage supply circuit.

    Possible Sources 

    • Wiring, terminals or connectors
    • BECMB
    • RCM
    • OCSM

    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: 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.
    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. BK1 RETRIEVE OCSM (OCCUPANT CLASSIFICATION SYSTEM 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 BECMB self-test.

    Was DTC B00A0:11, B00A0:12, B1123:11 or B1123:12 retrieved during self-test? 

    Yes  This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the self-test.For DTC B00A0:11, GO to BK2 For DTC B00A0:12, GO to BK5 For DTC B1123:11, GO to BK8 For DTC B1123:12, GO to BK10 
    No  This is an intermittent fault. GO to BK15 

  3. BK2 CHECK THE OCSM (OCCUPANT CLASSIFICATION SYSTEM MODULE) POWER SUPPLY CIRCUIT FOR A SHORT TO GROUND

    WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

    • Ignition OFF.

    • Disconnect Overhead Console C930.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3285 Pin 1
      GFD769505Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to BK3 
    No  REPAIR the circuit. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to BK16 

  4. BK3 CHECK THE BECMB (BATTERY ENERGY CONTROL MODULE B) DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE FROM SHORT TO GROUND

    • Ignition ON.

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

    Was DTC B00A0:11 retrieved during self-test? 

    Yes  GO to BK12 
    No  GO to BK4 

  5. BK4 CHECK THE PAD (PASSENGER AIRBAG DEACTIVATION) INDICATOR DTC (DIAGNOSTIC TROUBLE CODE) FOR A SHORT TO GROUND

    • Ignition OFF.

    • Connect Overhead Console C930.

    • Ignition ON.

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

    Was DTC B00A0:11 retrieved during self-test? 

    Yes  INSTALL a new overhead console REFER to: Overhead Console . GO to BK16 
    No  GO to BK14 

  6. BK5 CHECK THE OCSM (OCCUPANT CLASSIFICATION SYSTEM MODULE) POWER SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE

    WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

    • Ignition OFF.

    • Disconnect Overhead Console C930.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3285 Pin 1
      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 BK16 
    No  GO to BK6 

  7. BK6 CHECK THE BECMB (BATTERY ENERGY CONTROL MODULE B) DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE FROM SHORT TO VOLTAGE

    • Ignition OFF.

    • Ignition ON.

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

    Was DTC B00A0:12 retrieved during self-test? 

    Yes  GO to BK7 
    No  GO to BK14 

  8. BK7 CHECK THE PAD (PASSENGER AIRBAG DEACTIVATION) INDICATOR DTC (DIAGNOSTIC TROUBLE CODE) FOR A SHORT TO POWER

    • Ignition OFF.

    • Connect Overhead Console C930.

    • Ignition ON.

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

    Was DTC B00A0:12 retrieved during self-test? 

    Yes  INSTALL a new overhead console REFER to: Overhead Console . GO to BK16 
    No  GO to BK14 

  9. BK8 CHECK THE RCM (RESTRAINTS CONTROL MODULE) POWER SUPPLY CIRCUIT FOR A SHORT TO GROUND

    WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

    • Ignition OFF.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C310A Pin 19
      GFD769505Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to BK9 
    No  REPAIR the circuit. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information. GO to BK16 

  10. BK9 CHECK THE BECMB (BATTERY ENERGY CONTROL MODULE B) DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE FROM SHORT TO GROUND

    • Ignition ON.

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

    Was DTC B1123:11 retrieved during self-test? 

    Yes  GO to BK12 
    No  GO to BK13 

  11. BK10 CHECK THE RCM (RESTRAINTS CONTROL MODULE) POWER SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE

    WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

    • Ignition OFF.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C310A Pin 19
      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 BK16 
    No  GO to BK11 

  12. BK11 CHECK THE BECMB (BATTERY ENERGY CONTROL MODULE B) DTC (DIAGNOSTIC TROUBLE CODE) FOR A FAULT STATUS CHANGE FROM SHORT TO VOLTAGE

    • Ignition OFF.

    • Ignition ON.

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

    Was DTC B1123:12 retrieved during self-test? 

    Yes  GO to BK12 
    No  GO to BK13 

  13. BK12 CONFIRM THE BECMB (BATTERY ENERGY CONTROL MODULE B) FAULT

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

    • 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 wiring harness for any damage, pinched, cut or pierced wires.
      • repair any concerns found. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information.

    • Connect all  previously disconnected components.

    • Ignition ON.

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

    Was the original DTC retrieved 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 BECMB, REFER to: Battery Energy Control Module B (BECMB) . GO to BK16 
    No  In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test. GO to BK15 

  14. BK13 CONFIRM THE RCM (RESTRAINTS CONTROL MODULE) FAULT

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

    • 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 wiring harness for any damage, pinched, cut or pierced wires.
      • repair any concerns found. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information.

    • Connect RCM C310A and C310B (if previously disconnected).

    • Connect BECMB C3518 (if previously disconnected).

    • Ignition ON.

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

    Was the original DTC retrieved 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 BK16 
    No  In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test. GO to BK15 

  15. BK14 CONFIRM THE OCSM (OCCUPANT CLASSIFICATION SYSTEM MODULE) FAULT

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

    • 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 wiring harness for any damage, pinched, cut or pierced wires.
      • repair any concerns found. Refer to OEM_CONNECTOR_REPAIR_PROCEDURES for schematic and connector information.

    • Connect OCSM C3285 (if previously disconnected).

    • Connect BECMB C3518 (if previously disconnected).

    • Ignition ON.

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

    Was the original DTC retrieved 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 OCS sensor. REFER to: Occupant Classification System (OCS) Sensor . GO to BK16 
    No  In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test. GO to BK15 

  16. BK15 CHECK FOR AN INTERMITTENT FAULT

    • Ignition OFF.

    • For DTC B00A0:11 or B00A0:12, disconnect OCSM C3285.

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

    • For DTC B1123:11 or B1123:12, disconnect RCM C310A and C310B

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

    • For DTC B00A0:11 or B00A0:12, connect OCSM C3285.

    • For DTC B1123:11 or B1123:12, connect RCM C310A and C310B

    • Ignition ON.

    • Using a diagnostic scan tool, perform BECMB self-test to retrieve Diagnostic Trouble Codes (DTCs).

    Was DTC B00A0:11, B00A0:12, B1123:11 or B1123:12 retrieved during self-test? 

    Yes  The fault condition is now present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the self-test.For DTC B00A0:11, GO to BK2 For DTC B00A0:12, GO to BK5 For DTC B1123:11, GO to BK8 For DTC B1123:12, GO to BK10 
    No  CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wiring harness and cycling the ignition frequently. ACTIVATE other system in the same wiring harness. Do not install any new SRS components at this time. Only install SRS components when directed to do so in the pinpoint test. REPAIR any intermittent concerns found. GO to BK16 

  17. BK16 CHECK FOR ADDITIONAL SRS (SUPPLEMENTAL RESTRAINT SYSTEM) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition OFF.

    • Connect all  previously disconnected SRS components.

    • Ignition ON.

    • NOTE: When selecting Restraints from the Self Test menu, DTCs are retrieved from the RCM, OCSM and BECMB.

      Using a diagnostic scan tool, perform

      Restraints  self-test.

    Are any RCM, OCSM and/or BECMB 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 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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