Air Bag Systems: Description and Operation
INTRODUCTIONWARNING: Extreme care must be used when servicing the SRS to avoid injury to the service personnel (by inadvertent deployment of the air bags) or the driver (by rendering the SRS inoperative).
The Supplemental Restraint System (SRS) and seat belt with pre-tensioner is designed to supplement the driver's and front passenger's seat belts to help reduce the risk or severity of injury to the driver and front passenger by activating and deploying both front air bags in certain frontal collisions. The SRS consist of four air bag modules, SRS air bag control unit (SRS-ECU), front impact sensors, SRS warning light, and clock spring. Air bags are located in the center of the steering wheel, above the glove box. Each air bag is made up of a folded air bag and an inflator unit. The control unit under the floor console monitors the system and has a safing G-sensor and an analog G-sensor. The front impact sensors are installed in the fender shield panel. The warning light on the instrument panel indicates the operational status of the SRS. The clock spring is installed in the steering column. The seat belt pre-tensioner is built into the driver's front seat belt retractor. Only authorized service personnel should do work on or around the SRS components. Those service personnel should read this information carefully before starting any such work.