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Pinpoint Test BH: B00C2:11 And B00C2:12

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. Refer to Wiring Diagrams SUPPLEMENTAL RESTRAINT SYSTEM for schematic and connector information.

    Normal Operation and Fault Conditions 

    The Belt Tension Sensor (BTS) operates in conjunction with the OCS. The OCSM provides a reference voltage (VREF)  to the Belt Tension Sensor (BTS), which changes as it passes through the sensor, based on how much tension is applied to the seatbelt and Belt Tension Sensor (BTS).

    The OCSM monitors the Belt Tension Sensor (BTS) reference voltage circuit for a short to voltage or a short to ground.

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

    If a fault is detected, the OCSM stores DTC B00C2:11 or B00C2:12 in memory and sends a message to the RCM over the HS-CAN2 indicating that an OCS fault is present. Upon receipt of this message, the RCM sets DTC B00A0:09 and sends a message to the IPC to illuminate the airbag warning indicator.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    OCSM B00C2:11 Passenger Seat Occupant Classification Sensor "C": Circuit Short To Ground A fault is indicated when the OCSM senses a short to ground on the Belt Tension Sensor (BTS) reference voltage circuit.
    OCSM B00C2:12 Passenger Seat Occupant Classification Sensor "C": Circuit Short To Battery A fault is indicated when the OCSM senses a short to voltage on the Belt Tension Sensor (BTS) reference voltage circuit.

    Possible Sources 

    • Wiring, terminals or connectors
    • Belt Tension Sensor (BTS) (part of the front passenger seatbelt buckle)
    • OCSM

    Visual Inspection and Pre-checks 

    • Inspect for a damaged passenger seatbelt buckle or Belt Tension Sensor (BTS).
    • Inspect for a damaged passenger seat cushion wiring harness.
    • Inspect for a loose or damaged OCSM or Belt Tension Sensor (BTS) connector.
    • Inspect for a damaged OCSM.

  2. 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.
  3. NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
  4. NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
  5. 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.
  6. 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.
  7. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

  8. BH1 RETRIEVE OCSM (OCCUPANT CLASSIFICATION SYSTEM MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

    • 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.

      REFER to: Pyrotechnic Device Health and Safety Precautions .

    • Ignition ON.

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

    Was DTC B00C2:11 or B00C2:12 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 the self-test. For DTC B00C2:11, GO to  BH2 For DTC B00C2:12, GO to  BH4
    No  This is an intermittent fault when present as a CMDTC only. GO to  BH6

  9. BH2 CHECK THE BELT TENSION SENSOR (BTS)

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

    • Ignition OFF.

    • Disconnect Passenger Seatbelt Buckle C3738.

    • Ignition ON.

    • Ignition OFF.

    • Ignition ON.

    • NOTE: After turning the ignition on, it is important to wait a minimum of 10 seconds before carrying out the OCSM self-test. This ensures that the OCSM self-diagnostics have completed prior to the self-test.

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

    • DIAGNOSTIC TIP:  When viewing Diagnostic Trouble Codes (DTCs) with the Belt Tension Sensor (BTS) disconnected, an open circuit fault is normally retrieved. The Belt Tension Sensor (BTS) shares a connector with the passenger seatbelt buckle switch, and a passenger seatbelt buckle switch circuit fault is also present in the RCM.

    Was DTC B00C2:11 retrieved on-demand during self-test? 

    Yes  GO to  BH3
    No  INSTALL a new passenger seatbelt buckle. REFER to: Front Seatbelt Buckle . GO to  BH7

  10. BH3 CHECK THE BELT TENSION SENSOR (BTS) VREF 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 OCSM C3285.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3738-2
      GFD562389Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  BH5
    No  REPAIR the circuit. Refer to Wiring Diagrams OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  BH7

  11. BH4 CHECK THE BELT TENSION SENSOR (BTS) VREF CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect Passenger Side Airbag (Inline) C3053.

    • Disconnect Passenger Seatbelt Buckle C3738.

    • Disconnect OCSM C3285.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C3738-2
      GFD562392Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit. Refer to Wiring Diagrams OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information. GO to  BH7
    No  GO to  BH5

  12. BH5 CONFIRM THE OCSM (OCCUPANT CLASSIFICATION SYSTEM MODULE) FAULT

    NOTE: Make sure all OCS system components, restraint system sensor electrical connectors 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 wiring harness for any damage, pinched, cut or pierced wires.
      • repair any concerns found. Refer to Wiring Diagrams OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.

    • Connect OCSM C3285 (if previously disconnected).

    • Connect Passenger Seatbelt Buckle C3738.

    • Connect Passenger Side Airbag (Inline) C3053 (if previously disconnected).

    • Ignition ON.

    • Ignition OFF.

    • Ignition ON.

    • NOTE: After turning the ignition on, it is important to wait a minimum of 10 seconds before carrying out the OCSM self-test. This ensures that the OCSM self-diagnostics have completed prior to the self-test.

      Using a diagnostic scan tool, perform OCSM 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 OCS sensor. REFER to: Occupant Classification System (OCS) Sensor - Vehicles With: Multi-Contour Seats . or REFER to: Occupant Classification System (OCS) Sensor - Vehicles Without: Multi-Contour Seats . GO to  BH7
    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  BH6

  13. BH6 CHECK FOR AN INTERMITTENT FAULT

    • Ignition OFF.

    • Disconnect Passenger Seatbelt Buckle C3738.

      • 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 Wiring Diagrams OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.

    • Connect Passenger Seatbelt Buckle C3738.

    • Ignition ON.

    • Ignition OFF.

    • Ignition ON.

    • NOTE: After turning the ignition on, it is important to wait a minimum of 10 seconds before carrying out the OCSM self-test. This ensures that the OCSM self-diagnostics have completed prior to the self-test.

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

    Was DTC B00C2:11 or B00C2:12 retrieved on-demand 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 on-demand during the self-test. For DTC B00C2:11, GO to  BH2 For DTC B00C2:12, GO to  BH4
    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  BH7

  14. BH7 CHECK FOR ADDITIONAL SRS (SUPPLEMENTAL RESTRAINT SYSTEM) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition OFF.

    • Connect all  previously disconnected components and connectors.

    • Ignition ON.

    • NOTE: When selecting Restraints from the Self Test menu, DTCs are retrieved from the RCM and OCSM.
      NOTE: After turning the ignition on, it is important to wait a minimum of 10 seconds before carrying out the OCSM self-test. This ensures that the OCSM self-diagnostics have completed prior to the self-test.

      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 the DTC Chart In this article.
    No  The repair is complete. RETURN the vehicle to the customer.
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