Pinpoint Test U: Second Row Left 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 second row left seatbelt buckle switch circuits for the following faults:

Open circuit
Short to voltage
Short to ground
Current out of range
Faulted second row left seatbelt buckle switch

If a fault is detected, the RCM stores DTC B140C:11, B140C:12, B140C:13 or B140C:1D in memory and sends a message to the IPC to illuminate the airbag warning indicator.

PPT U RCM DTC FAULT TRIGGER CONDITIONS

DTC

Description

Fault Trigger Conditions

Possible Causes

Wiring, terminals or connectors
Second row left seatbelt buckle switch
RCM

Visual Inspection

Inspect for a damaged left rear 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.

Circuit	Pin
SNSR_RTN (Sensor Return) - RR172	53(GREEN/VIOLET)