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
Ignition switch supplies ignition voltage to Sensing and Diagnostic Module (SDM) at terminal A1 via AIR BAG fuse, located in junction block on left end of instrument panel. See Figure. When ignition is turned on, SDM responds by performing tests on SIR system while commanding Instrument Panel Cluster (IPC) to flash AIR BAG warning light 7 times. If no Diagnostic Trouble Codes (DTC's) exist, AIR BAG warning light will turn off.
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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.