Pinpoint Test - DTC: KK - B0061:11, B0061:12, B0061:13, B0061:64

Refer to 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 OCS interprets a variable voltage signal provided by the Belt Tension Sensor (BTS) to identify the possible presence of a child safety seat in the front passenger seat. The voltage output of the Belt Tension Sensor (BTS) is proportional to the amount of tension applied to the sensor by the belt: no belt tension causes a low voltage (approximately 0.95 volt) to be output and high belt tension causes a high voltage (approximately 3.8 volts) to be returned to the OCSM.

The OCSM monitors the Belt Tension Sensor (BTS) and related circuits for the following faults:

• Resistance out of range
• Unexpected voltage
• Short to ground
• Faulted Belt Tension Sensor (BTS) (part of RH front passenger seatbelt buckle)

If a fault is detected, the OCSM stores DTC B0061:11, B0061:12, B0061:13 or B0061:64 in memory and sends a message to the RCM over the HS-CAN2 indicating that an OCSM 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 

Possible Sources 

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

Visual Inspection and Diagnostic 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.

PINPOINT TEST A : B0061:11, B0061:12, B0061:13, B0061:64 

1. NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
2. 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.
3. 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.
4. NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
5. A1 RETRIEVE OCSM (OCCUPANT CLASSIFICATION SYSTEM MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
   
   
   • WARNING: Before beginning any service procedure in this article, refer to Safety Warnings. 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 B0061:11, B0061:12, B0061:13 or B0061:64 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 B0061:11, GO to  A2 For DTC B0061:12, GO to  A5 For DTC B0061:13, GO to  A8 For DTC B0061:64, GO to  A10

   No	This is an intermittent fault when present as a CMDTC only. GO to  A13

6. A2 CHECK THE BELT TENSION SENSOR (BTS)
   
   
   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.
   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.
   • 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, as a result, a passenger seatbelt buckle switch circuit fault will also be present in the RCM.

   Was DTC B0061:11 retrieved on-demand during self-test? 

   Yes

   GO to  A3

   No	INSTALL a new front passenger seatbelt buckle. REFER to: Front Seatbelt Buckle . GO to  A14

7. A3 CHECK THE BELT TENSION SENSOR (BTS) CIRCUITS FOR A SHORT TO GROUND OR A SHORT TOGETHER
   
   
   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
     C3738-1	Courtesy of FORD MOTOR COMPANY	Ground

   • Measure:

     Positive Lead	Measurement / Action	Negative Lead
     C3738-1	Courtesy of FORD MOTOR COMPANY	C3738-2

   Are the resistances greater than 10, 000 ohms? 

   Yes

   GO to  A4

   No	REPAIR the circuit(s). Refer to OEM Connector Repair Procedures (Except Hybrid) for schematic and connector information. GO to  A14

8. A4 CHECK THE BELT TENSION SENSOR (BTS) VREF CIRCUIT FOR AN OPEN
   
   
   • Measure:

     Positive Lead	Measurement / Action	Negative Lead
     C3285-5	Courtesy of FORD MOTOR COMPANY	C3738-2

   Is the resistance less than 0.5 ohm? 

   Yes	GO to  A12

   No	REPAIR the circuit. Refer to OEM Connector Repair Procedures (Except Hybrid) for schematic and connector information. GO to  A14

9. A5 CHECK THE BELT TENSION SENSOR (BTS) SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
   
   
   • Ignition OFF.
   • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
   • Disconnect Passenger Side Airbag (Inline) C3206.
   • Disconnect Passenger Seatbelt Buckle C3738.
   • Disconnect OCSM C3285.
   • Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
   • Ignition ON.
   • Measure:

     Positive Lead	Measurement / Action	Negative Lead
     C3285-6	Courtesy of FORD MOTOR COMPANY	Ground

   Is any voltage present? 

   Yes	REPAIR the circuit. Refer to OEM Connector Repair Procedures (Except Hybrid) for schematic and connector information. GO to  A14

   No	For 2013 model year vehicles, GO to  A6 For 2014 and newer model year vehicles, GO to  A7

10. A6 CHECK THE BELT TENSION SENSOR (BTS) GROUND CIRCUIT FOR AN OPEN - 2013 MODEL YEAR
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect RCM C310A and C310B.
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C3738-3	Courtesy of FORD MOTOR COMPANY	C310B-53

    Is the resistance less than 3 ohms? 

    Yes	GO to  A11

    No	REPAIR the circuit. Refer to OEM Connector Repair Procedures (Except Hybrid) for schematic and connector information. GO to  A14

11. A7 CHECK THE BELT TENSION SENSOR (BTS) GROUND CIRCUIT FOR AN OPEN - 2014 AND NEWER MODEL YEAR
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect RCM C310A and C310B.
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C3738-3	Courtesy of FORD MOTOR COMPANY	Ground

    Is the resistance less than 3 ohms? 

    Yes	GO to  A11

    No	REPAIR the circuit. Refer to OEM Connector Repair Procedures (Except Hybrid) for schematic and connector information. GO to  A14

12. A8 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.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect Passenger Side Airbag (Inline) C3206.
    • Disconnect Passenger Seatbelt Buckle C3738.
    • Connect a fused jumper wire:

      Lead 1	Measurement / Action	Lead 2
      C3738-1	Courtesy of FORD MOTOR COMPANY	C3738-3

    • Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Ignition ON.
    • Using a diagnostic scan tool, perform OCSM self-test.
    • DIAGNOSTIC TIP:  When viewing Diagnostic Trouble Codes (DTCs) with the Belt Tension Sensor (BTS) circuits shorted together, a short to ground fault is normally retrieved. The Belt Tension Sensor (BTS) shares a connector with the passenger seatbelt buckle switch and, as a result, a passenger seatbelt buckle switch circuit fault will also be present in the RCM.

    Did the on-demand DTC change from B0061:13 to B0061:11? 

    Yes	INSTALL a new front passenger seatbelt buckle. REFER to: Front Seatbelt Buckle . GO to  A14

    No

    GO to  A9

13. A9 CHECK THE BELT TENSION SENSOR (BTS) SIGNAL CIRCUIT FOR AN OPEN
    
    
    • Ignition OFF.
    • Disconnect OCSM C3285.
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C3738-1	Courtesy of FORD MOTOR COMPANY	C3285-6

    Is the resistance less than 0.5 ohm? 

    Yes	GO to  A11

    No	REPAIR the circuit. Refer to OEM Connector Repair Procedures (Except Hybrid) for schematic and connector information. GO to  A14

14. A10 CHECK THE BELT TENSION SENSOR (BTS) SIGNAL CIRCUIT FOR A SHORT TO THE BELT TENSION SENSOR (BTS) VREF CIRCUIT
    
    
    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.
    • Disconnect Passenger Seatbelt Buckle C3738.
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      C3738-2	Courtesy of FORD MOTOR COMPANY	C3738-1

    Is the resistance greater than 10, 000 ohms? 

    Yes	GO to  A11

    No	REPAIR the circuits. Refer to OEM Connector Repair Procedures (Except Hybrid) for schematic and connector information. GO to  A14

15. A11 CHECK BELT TENSION SENSOR (BTS) VOLTAGE OUTPUT
    
    
    • Ignition OFF.
    • Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Connect OCSM C3285.
    • Disconnect Passenger Side Airbag (Inline) C3206.
    • Connect fused jumper wires:

      Lead 1	Measurement / Action	Lead 2
      Courtesy of FORD MOTOR COMPANY C3738, pin 2, harness side	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY C3738, pin 2, component side
      Courtesy of FORD MOTOR COMPANY C3738, pin 3, harness side	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY C3738, pin 3, component side

    • Repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Ignition ON.
    • Measure:

      Positive Lead	Measurement / Action	Negative Lead
      Courtesy of FORD MOTOR COMPANY C3738, pin 1, component side	Courtesy of FORD MOTOR COMPANY	Ground

    Does the voltage vary from approximately 0.95 volt with no tension applied to the sensor to approximately 3.8 volts with full tension applied to the sensor? 

    Yes	REMOVE the fused jumper wires and GO to  A12

    No	REMOVE the fused jumper wires and INSTALL a new front passenger seatbelt buckle. REFER to: Front Seatbelt Buckle . GO to  A14

16. A12 CONFIRM THE OCSM (OCCUPANT CLASSIFICATION SYSTEM MODULE) FAULT
    
    
    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.
    NOTE: Make sure all OCS components, SRS 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 wire harness for any damage, pinched, cut or pierced wires.
      • repair any concerns found. Refer to OEM Connector Repair Procedures (Except Hybrid) for schematic and connector information.

    • Connect OCSM C3285 (if previously disconnected).
    • Connect Passenger Seatbelt Buckle C3738 (if previously disconnected).
    • If previously directed to disconnect Passenger Side Airbag (Inline) C3133, depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Connect Passenger Side Airbag (Inline) C3206.
    • If previously directed to depower the SRS, repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Ignition ON.
    • 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new OCS sensor. REFER to: Occupant Classification System (OCS) Sensor . REFER to: Occupant Classification System (OCS) Sensor . GO to  A14

    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  A13

17. A13 CHECK FOR AN INTERMITTENT FAULT
    
    
    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 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 wire harness for any damage, pinched, cut or pierced wires.
      • repair any concerns found. Refer to OEM Connector Repair Procedures (Except Hybrid) for schematic and connector information.

    • Connect Passenger Seatbelt Buckle C3738.
    • Ignition ON.
    • Using a diagnostic scan tool, perform OCSM self-test.

    Was DTC B0061:11, B0061:12, B0061:13 or B0061:64 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 B0061:11 or B0061:1A, GO to  A2 For DTC B0061:12, GO to  A5 For DTC B0061:13, GO to  A8 For DTC B0061:64, GO to  A10

    No

    CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition frequently. ACTIVATE other system in the same wire 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  A14

18. A14 CHECK FOR ADDITIONAL SRS (SUPPLEMENTAL RESTRAINT SYSTEM) DIAGNOSTIC TROUBLE CODES (DTCS)
    
    
    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.
    • If previously directed to disconnect Passenger Side Airbag (Inline) C3206, depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Reconnect all SRS components (if previously disconnected).
    • If previously directed to depower the SRS, repower the SRS. Do not prove out the SRS at this time. REFER to: Supplemental Restraint System (SRS) Depowering and Repowering .
    • Ignition ON.
    • NOTE: When selecting Restraints from the Self Test menu, DTCs are retrieved from the RCM, OCSM and, if equipped, 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. REFER to: Airbag Supplemental Restraint System (SRS) .

    No	The repair is complete. RETURN the vehicle to the customer.