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GENERAL DESCRIPTION
INTRODUCTION
The Supplemental Restraint System (SRS) 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 air bags and seatbelt pretensioners in certain frontal collisions.
The SRS Airbag consists of two air bag modules, SRS air bag control unit (SRS-ECU), SRS warning light, and clock spring. One air bag is located in the center of the steering wheel and another 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 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 pretensioner is a device built into the front seat belt retractor assembly which activates to retract the seat belt and remove looseness in the event of a collision in which the deceleration force exeeds a specific value.
Only authorized service personnel should do work on or around the SRS components. Those service personnel should read this manual carefully before starting any such work.
CAUTION: Extreme care must be used when servicing the SRS or performing repairs on components mounted near SRS components to avoid injury to the service personnel (by inadvertent deployment of the air bags or seatbelt pretensioners) or the driver (by rendering the SRS inoperative).
SEAT BELT WITH PRE-TENSIONER


ON-BOARD DIAGNOSTIC/SRS WARNING LIGHT FUNCTION
The SRS-ECU monitors the SRS Airbag and Seatbelt pre-tensioner system and stores data concerning any detected faults in the system. When the ignition key is in "ON" or "START" position, the SRS warning light should illuminate for about 7 seconds and then turn off and remain extinguished for at least 5 seconds. That indicates that the SRS system is in operational order. If the SRS warning light does any of the following, immediate inspection by an authorized dealer is needed.
(1)The SRS warning light does not illuminate as described above.
(2)The SRS warning light stays on for more than 7 seconds.
(3)The SRS warning light illuminates while driving.
If a vehicle's SRS warning light is in any of these three conditions when brought in for inspection, the SRS system must be inspected, diagnosed and serviced in accordance with this manual.