Electrical System

Operation and Components
The air bag system is powered directly from the battery. The system can function with the ignition switch in any position, including OFF and LOCK. The system can also function when the driver's seat is unoccupied.

The electrical system performs three main functions:
^ Detects an impact.
^ Switches electric power to the igniter.
^ Monitors the system to determine readiness.

The electrical system components include:
^ Electronic diagnostic monitor.
^ Air bag system readiness indicator lamp.
^ Wiring harness.
^ Sensors.
^ Igniter Assembly.
^ Backup power supply.

Sensors
The sensor assembly is an electrical switch which reacts to impacts according to direction and force. It discriminates between impacts that require air bag inflation and impacts that do not require air bag inflation. When an impact occurs that requires air bag inflation, the sensor contacts close, completing the electrical circuit necessary for system operation.

Five sensors are mounted in the vehicle. Their locations are as follows:
^ A dual sensor at the radiator support.
^ At the RH fender apron.
^ At the LH fender apron.
^ At the LH cowl side in the passenger compartment.

At least two sensors, one safing, one front, must be activated to inflate the air bag.








AIR BAG FIRING CIRCUIT DIAGRAM

Backup Power Supply
A backup power supply is included in the system to provide air bag deployment if the battery or battery cables are damaged in an accident before the crash sensors close. The power supply is a capacitor that will discharge approximately 15 minutes after the battery is disconnected. It is located in the RH instrument panel above the glove compartment.

WARNING: THE BACKUP POWER SUPPLY MUST BE DISCONNECTED BEFORE ANY AIR BAG COMPONENT SERVICE IS PERFORMED.