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.
Circuit/System Testing
The seat belt buckle replacement with the seat belt tension sensor must be serviced as a complete unit.
When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:
- Passenger seat belt tension sensor
- K36 Inflatable Restraint Sensing and Diagnostic Module
- Passenger seat belt tension sensor wiring harness connector
- K36 Inflatable Restraint Sensing and Diagnostic Module wiring harness connector
- Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the B61P Seat Belt Tension Sensor - Passenger. It may take up to 2 min for all vehicle systems to power down.
- Test for less than 10 Ω between the low reference circuit terminal 2 and ground.
- If greater than 10 Ω
- Ignition OFF, disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. It may take up to 2 min for all vehicle systems to power down.
- Test for less than 10 Ω between the low reference circuit and ground.
- If less than 10 Ω, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
- If greater than 10 Ω, repair the open/high resistance.
- Go to next step: If less than 10 Ω
- Ignition ON.
- Test for less than 6 V between the signal circuit terminal 1 and ground.
- If 6 V or greater
- Ignition OFF, disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module, ignition ON.
- Test for less than 1 V between the signal circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
- Go to next step: If less than 6 V
- Ignition OFF.
- Test for greater than 5 KΩ between the signal circuit terminal 1 and ground. It may take up to 2 minutes for all vehicle systems to power down.
- If less than 5 KΩ
- Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
- Test for Infinite resistance between the signal circuit and ground.
- If less than infinite resistance, repair the short to ground on the circuit.
- If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
- Go to next step: If greater than 5 KΩ
- Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
- Test for less than 2 Ω between the B61P Seat Belt Tension Sensor - Passenger signal circuit terminal 1 and the K36 Inflatable Restraint Sensing and Diagnostic Module signal circuit connector X2, terminal 47.
- If 2 Ω or greater
Repair the open/high resistance in the circuit.
- Go to next step: If less than 2 Ω
- If 2 Ω or greater
- If all circuits test normal, replace the B61P Seat Belt Tension Sensor - Passenger.
- Ignition ON, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
- Verify DTC B0071 does not set.
- If DTC B0071 is set
Replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
- Go to next step: If DTC B0071 is not set
- If DTC B0071 is set
- All OK.
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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.