Operation CHARM: Car repair manuals for everyone.

Malfunction Lamp / Indicator: Description and Operation

The warning lamp will illuminate if there is an air bag system malfunction. Ignition voltage is supplied to the air bag warning lamp when the ignition switch is in the RUN or START positions. The DERM controls the lamp by providing a ground with the lamp driver. The air bag warning lamp will flash seven times when the ignition switch is first turned on to verify DERM operation.