Before Replacing Control Module
- When all other tests have been performed, and fault has not been determined, air bag system control module is suspect. Before replacing module, check once more that all diagnostic steps have been followed precisely. If DTC set is an intermittent fault, try wiggling wiring and connectors while repeating test procedure.
- If you are unclear about circuit operation, consult wiring diagram and any appropriate electrical manuals covering this vehicle. Be sure you understand all points of circuit operation.
- Be certain all grounding points are clean and tight. If you have already checked these, do so again.
- Be certain voltage feeds and fuses to the air bag system are operating correctly.
- Check air bag system control module electrical connector carefully. Be certain there are no damaged or broken pins and that outer shell is not cracked or damaged. If the original fault was of an intermittent type, and involved the driver-side air bag circuit, replace clockspring first. Clockspring is most common component to fail in air bag system. If the original fault was an intermittent type not involving driver-side air bag circuit, or clockspring has already been replaced in previous procedure, air bag system harness should be replaced next. Wiring faults are more common than control module failures.
- If original fault is still present, replace air bag system control module. Verify correct system operation. See SYSTEM OPERATION CHECK .