Air Bag Systems: Description and Operation

The air bag deploys when any of the four sensors (right crash zone sensor, center crash zone censor, left crash zone sensor or tunnel sensor) and the safing sensor simultaneously activate while the ignition switch is "ON".





The control unit (diagnostic unit) diagnoses the SRS circuit. When the ignition key is in the "ON" or "START" position, the "AIR BAG" warning lamp will illuminate for about 7 seconds and then turn off.

This means that the system is operational.