Pinpoint Test GA: Passenger 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 passenger seatbelt buckle switch circuit for the following faults:

Open circuit
Short to voltage
Short to ground
Faulted passenger seatbelt buckle switch

If a fault is detected, the RCM stores DTC B0052:11, B0052:12, B0052:13 or B0052:1D in memory and sends a message to the IPC to illuminate the airbag warning indicator.

PPT G RCM DTC FAULT TRIGGER CONDITIONS

DTC	Description	Fault Trigger Conditions
B0052:11	Passenger Seatbelt Sensor: Circuit Short to Ground	Sets when the RCM senses a short to ground from the passenger seatbelt buckle switch.
B0052:12	Passenger Seatbelt Sensor: Circuit Short to Battery	Sets when the RCM senses a short to voltage from the passenger seatbelt buckle switch.
B0052:13	Passenger Seatbelt Sensor: Circuit Open	Sets when the RCM senses an open from either passenger seatbelt buckle switch circuit.
B0052:1D	Passenger Seatbelt Sensor: Circuit Current Out of Range	Sets when the RCM senses current out of an acceptable range between the passenger seatbelt buckle switch circuit.

Possible Causes

Wiring, terminals or connectors
Passenger seatbelt buckle switch
RCM

Visual Inspection and Diagnostic Pre-checks

Inspect for a damaged passenger 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.

Passenger Seatbelt Buckle Connector - C3238

Circuit	Pin
FR_PASS_SBLT_BCKL_SN_FD (Front Passenger Seatbelt Buckle Sensor Feed) - CR201	5(GREEN/BLUE)
SNSR_RTN (Sensor Return) - GD901	6(BLACK)

Restraint Control Module-B (RCM-B) Connector - C310B

Circuit	Pin
FR_PASS_SBLT_BCKL_SN_FD (Front Passenger Seatbelt Buckle Sensor Feed) - CR203	55(GRAY/VIOLET)
SNSR_RTN (Sensor Return) - RR172	53(GREEN/VIOLET)