General Description

GENERAL DESCRIPTION

NOTE: In this manual, the part names are changed from the names in owner's manual into the following names.
- Driver's seat position sensor -> Seat slide sensor
- Passenger's seat weight sensor -> Occupant classification sensor
- Seat belt buckle switch -> Seat belt switch
- Passenger air bag off indicator -> Passenger air bag OFF indicator light
- Front passenger seat belt warning light -> Passenger seat belt warning light.

DANGER: The SRS-ECU adopts the rollover specification that the curtain airbag and seat belt pre-tensioner operate at the occurrence of rollover. Therefore, do not tilt the vehicle to the right and left with the IG ON or tilt the SRS-ECU to the right and left with the IG ON and the harness installed.

WARNING: Improper service could result in serious injury of the service personnel or the passenger.

The SRS is designed to supplement the front seat belts. It reduces injury to the driver(s) and the front passenger(s) by deploying air bag(s) in case of a head-on collision.
The SRS front air bags from an advanced air bag system together with sensors at the vehicle and sensors attached to front seats.

Side-airbag systems in the front seats are activated when side impacts exceed a criteria to protect the occupants upper bodies.

The curtain air bag systems are activated when side impacts applied to the vehicle exceed criteria, to protect the heads of the occupants in the front seats.

The seat belts with pre-tensioner work simultaneously with the SRS. The seat belt incorporating the pre-tensioner automatically winds the seatbelt upon front impact to reduce forward shifting of the driver's and passenger's. The seat belt use status is used to control the activation and deactivation of the pre-tensioner.

The SRS consists of six air bag modules, SRS air bag control unit (SRS-ECU), two front impact sensors, four side impact sensors, SRS warning light, passenger's air bag OFF indicator light, passenger's seat belt warning light, clock spring, seat belt pre-tensioner, seat belt switch, seat slide sensor, occupant classification sensor and occupant classification-ECU. Air bag modules are located in the center of the steering wheel and above the glove box. Side-airbags are located inside the front seatback assemblies. The curtain air bag module consists of an air bag, an inflator, and the fixing gear relating to those parts, and is installed in the roof side sections (from the driver's and the passenger's front pillars to the rear pillars). Each air bag consists of a folded air bag and an inflator unit. The SRS-ECU placed on the forefront of the floor monitors the system and has a front air bag safing G-sensor, front air bag analog G-sensor and a side-airbag safing G-sensor. The front impact sensor is assembled in the radiator support panel to monitor impact in case of front impact. The side impact sensors inside the center pillars monitor the shock incurred by the sides of the vehicle. The SRS warning light on the combination meter 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 and passenger's front seat belt retractor. The seat slide sensor is installed at the seat adjuster section of the driver seat in order to detect the driver seat slide position. The occupant classification sensor is installed underneath a rail of the passenger seat to detect the load on the seat. The passenger's air bag OFF indicator light is installed to the lower left of the multi-center display, and illuminates when the passenger seat airbag is inactive. The passenger's seat belt warning light is installed to the lower right of the multi-center display, and illuminates when the passenger is not wearing the seatbelt. The seatbelt switch detects whether the seatbelt is used. 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.