- Airbag light on dashboard: This is the most common sign. The light may stay on constantly or flash.
- Airbags not deploying in an accident: This is a serious safety concern. If the module isn't working, the airbags may not deploy when needed.
- Airbags deploying unexpectedly: In rare cases, a faulty module can cause airbags to deploy for no reason.
- Error codes related to the airbag system: A scan tool can read trouble codes that point to the module or other airbag system problems.
To test if the airbag control module is the problem:
- Get the trouble codes read by a mechanic or auto parts store.
- Check the wiring and connections to the module. Loose or damaged wires can cause problems.
- Rule out other airbag system components, like sensors and the clock spring. A mechanic can use diagnostic tools to test these parts.
Common causes of failure:
- Water damage: If the module gets wet, it can short out and fail.
- Corrosion: Corrosion on the module's connectors can cause communication problems.
- Impact damage: A collision can damage the module.
- Electrical surges: Power surges in the vehicle's electrical system can damage the module.
- Age: Over time, the module's internal components can wear out.