See Figure 1
The air bag system is designed to operate in frontal or front angled collisions. The system will activate in a crash with severe frontal deceleration, more severe than hitting a parked vehicle of similar size and weight at 28 mph (45 km/h). The system will sense the severity of the crash rather than vehicle speed so some frontal collisions at speeds above 28 mph (45 km/h) may not be severe enough to require inflation.
The Supplemental Air Bag Restraint System is designed to provide increased collision protection for the driver in addition to that provided by the three-point seat belt system.
Seat belt use is necessary to receive the full advantages of the supplemental air bag restraint system.
The Supplemental Air Bag Restraint System consists of two basic subsystems:
The air bag system is powered directly by the battery. The system can function with the ignition switch in any position, including OFF and LOCK . The system performs three main functions:
The air bag electrical system components are as follows:
Air Bag Module
See Figure 2
The driver's side air bag module is serviced as an assembly. It is mounted in the center of the steering wheel. The module consists of the following components:
The inflator assembly is not a serviceable item.
When the sensors close, signaling a crash, the electrical current flows to the air bag inflator. Inside the inflator, an igniter converts the electrical energy to thermal energy (heat). This causes the ignition of the inflator gas generant.
This ignition reaction combusts the sodium azide\copper oxide gas generant in the inflator, producing nitrogen gas, which in turn inflates the air bag.Air Bag
The air bag is constructed of neoprene coated nylon and is 28 inches (711mm) in diameter. The air bag fills to a volume of about 2.3 cubic feet (0.065 cubic meters) in approximately 40 milliseconds. The air bag assembly is not a serviceable item. You must replace it with a new one when involved in any type of crash whether it has inflated or not.STEERING WHEEL TRIM COVER
The steering wheel trim cover encases the driver's side air bag module. The trim has molded-in tear seams that separate to allow inflation of the air bag. The trim cover is a component of the air bag module and is not a serviceable item.