Pinpoint Test Fa: Driver Buckle Sensor: Notes
Refer to appropriate Supplemental Restraint System in OEM Wiring Diagrams article, for schematic and connector information.
Normal Operation and Fault Conditions
The RCM continuously monitors the driver seatbelt buckle switch circuits for the following faults:
- Open circuit
- Short to voltage
- Short to ground
- Current out of range
- Faulted driver seatbelt buckle switch
If a fault is detected, the RCM stores DTC B0050:11, B0050:12, B0050:13 or B0050:1D in memory and sends a message to the IPC to illuminate the airbag warning indicator.
PPT F RCM DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B0050:11 | Driver Seatbelt Sensor: Circuit Short to Ground | Sets when the RCM senses a short to ground on the driver seatbelt buckle switch circuit. |
| B0050:12 | Driver Seatbelt Sensor: Circuit Short to Battery | Sets when the RCM senses a short to voltage on the driver seatbelt buckle switch circuit. |
| B0050:13 | Driver Seatbelt Sensor: Circuit Open | Sets when the RCM senses an open on either driver seatbelt buckle switch circuit. |
| B0050:1D | Driver Seatbelt Sensor: Circuit Current Out of Range | Sets when the RCM senses current out of an acceptable range between the driver seatbelt buckle switch circuits. |
Possible Causes
- Wiring, terminals or connectors
- Driver seatbelt buckle switch
- RCM
Visual Inspection and Diagnostic Pre-checks
- Inspect for a damaged driver seatbelt buckle.
- Inspect for damaged wiring harness(es).
- Inspect for loose or damaged connectors.
WARNING:
Incorrect repair techniques or actions can cause an accidental 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.
CAUTION:
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 OCSM 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 OCSM component is installed, DTCs may set.
NOTE:
The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
Restraint Control Module-B RCM-B Connector - C310B
| Circuit | Pin |
|---|---|
| DRV_SBLT_BCKL_SN_FD (Driver Seatbelt Buckle Sensor Feed) - CR201 | 54(GREEN/BLUE) |
| SNSR_RTN (Sensor Return) - RR172 | 53(GREEN/VIOLET) |
Driver Seatbelt Buckle Switch Connector - C3247
| Circuit | Pin |
|---|---|
| DRV_SBLT_BCKL_SN_FD (Driver Seatbelt Buckle Sensor Feed) - CR201 | 5(GREEN/BLUE) |