The SRS (Supplemental Restraint System) air bag is a system that is effective with the seat belt fastened, and it is designed as a supplemental system of the seat belt. The air bag inflates upon a frontal collision or a side collision to protect the passengers. The SRS consists of air bag modules, SRS air bag control unit (SRS-ECU), two front impact sensors, two side impact sensors, SRS warning lamp, clock spring, passenger’s air bag cut off switch, passenger’s air bag OFF indicator lamp, and seat belt pre-tensioner. Front air bags are located in the centre of the steering wheel and above the glove box. Side-airbags are located inside the front seatback assemblies. The curtain air bag module is installed in the roof side sections (from the driver’s and the passenger’s front pillars to the rear pillars). Each air bag is made up of a folded air bag and an inflator unit. The SRS-ECU under the front floor console monitors the system and has a front air bag safing G-sensor, front air bag analog G-sensor. The front impact sensor is installed on the hood room and contains an analog G-sensor and a microcomputer. The side impact sensor is installed in the lower parts of the centre pillars and contains an analog G-sensor and a microcomputer. The warning lamp on the instrument panel indicates the operational status of the SRS. The clock spring is installed in the steering column. The passenger’s air bag cut off switch is located above inside the glove box <LHD>
or instrument panel centre lower panel assembly <RHD>. The passenger’s air bag OFF indicator lamp is installed in instrument centre panel. The seat belt pre-tensioner is built into the driver’s and passenger’s front seat belt retractor. High voltage shutdown function shuts off the high voltage as needed upon a frontal collision, side collision, and rear-end collision in order to reduce the risk for the occupants, rescuer, and rescue team of the electrical hazard caused by high voltage electric leakage. 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.
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