Air Bag Systems: Description and Operation

Air Bag System Diagram:

OPERATION DURING COLLISION
When either of the D sensors and the S sensor are activated (closed) simultaneously by shock of a collision, the circuit to the inflator is completed. The inflator creates nitrogen gas and the air bag is deployed. The gas vents from a hole on the back side of the bag to reduce shock to the driver and to allow easier exit from the vehicle.

DURING NORMAL CONDITIONS AND MALFUNCTION DETECTION
The diagnostic module constantly monitors air bag system components and wiring for malfunctions, open circuits and short circuits. If a malfunction is detected, the module illuminates or flashes the warning light. In case of a short circuit in the sensors or sensor harnesses, the module activates the warning light and shuts down the system to prevent accidental air bag deployment.