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 Verification
- Refer to SIR Service Precautions .
- Refer to SIR Disabling and Enabling .
- Ignition - On / Vehicle - In Service Mode
- Verify DTC is not set: B1001 @ K36 Inflatable Restraint Sensing and Diagnostic Module
- If the DTC is set
- Go to next step: If the DTC is not set
- Verify that DTC B0074, B101D, or B101E is not set in the Passenger Presence Module.
- If any of these DTCs are set in the Passenger Presence Module
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If none of these DTCs are set in the Passenger Presence Module
- If any of these DTCs are set in the Passenger Presence Module
- Verify DTC is not set:
B0081 00 @ K36 Inflatable Restraint Sensing and Diagnostic Module
- If DTC B0081 00 is set in the Inflatable Restraint Sensing and Diagnostic Module
The Passenger Presence Module has set B0081 11 or a B0081 4B. Refer to B0081 (Passenger Presence Module) for diagnosis.
- Go to next step: If DTC B0081 00 is not set in the Inflatable Restraint Sensing and Diagnostic Module
- If DTC B0081 00 is set in the Inflatable Restraint Sensing and Diagnostic Module
- Verify DTC is not set: B0081 3A @ K36 Inflatable Restraint Sensing and Diagnostic Module
- If the DTC is set
Replace the appropriate component: K85 Passenger Presence Module
- Go to next step: If the DTC is not set
- If the DTC is set
- All OK.
Refer to: SIR Service Precautions
The Inflatable Restraint Sensing and Diagnostic Module sets a redundant B0081 00 DTC when the Passenger Presence Module sets a DTC B0081 11 or B0081 4B.
The Inflatable Restraint Sensing and Diagnostic Module sets a B0081 3A when an incorrect Passenger Presence Module is installed.
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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.