Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pinpoint Test UB: Second Row Left Buckle Sensor (Buckle Assembly): 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 hand seatbelt buckle (part of rear seatbelt buckle assembly)
- RCM
Visual Inspection
- Inspect for a damaged second row left inflatable seatbelt buckle.
- Inspect for damaged wiring harness(es).
- Inspect for loose or damaged connectors.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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