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 Description
When ignition is turned on, Sensing and Diagnostic Module (SDM) performs tests to diagnose critical internal malfunctions. When SDM has completed power-up mode, SDM will establish communication with Passenger Presence System (PPS). PPS will respond by commanding both PASSENGER AIR BAG ON and OFF indicators, located in rear view mirror, on for 5 seconds. SDM will transmit a request message to PPS to receive PPS verification identification. PPS will transmit verification identification to SDM and SDM will compare identification received to data stored in memory. If data does not match, SDM will set DTC B0098 and turn AIR BAG warning light on. PPS will set DTC 065 and request SDM to disable passenger-side air bag module deployment loop.
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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.