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 SDM recognizes IGNITION POSITIVE VOLTAGE applied to terminal No. 10 is greater than 8.2 volts, AIR BAG warning light is flashed 7 times to verify operation. At this time SDM performs POWER-ON tests followed by RESISTANCE MEASUREMENT test and CONTINUOUS MONITORING tests. When a malfunction is detected, SDM sets a current DTC and turns AIR BAG warning light ON. SDM clears current DTCs and moves them to a history file when malfunction is no longer detected or ignition switch is cycled, except for DTCs B1018, B1024, B1051, B1053 and B1071. DTCs B1018, B1024, B1051, and B1053 will not clear using scan tool CLEAR CODES. Repair malfunction that set DTC before replacing SDM.
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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.