SUPPLEMENTAL RESTRAINT
SYSTEM (SRS)
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
side-air bag and the curtain
air bag are activated when an impact exceeds the threshold upon a side
collision, and inflates
to protect the heads of the occupants in the front and rear
seats.
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. Each air
bag is made up of a folded air bag and an inflator unit. 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).The SRS-ECU
under the front floor console monitors the system and has a front air
bag analogue G-sensor,
front air bag analogue G-sensor and a side (curtain) air bag analogue
G-sensor. The front impact
sensor is installed on the front end upper bar in the engine room and
contains an analogue G-sensor.
The side impact sensor is installed in the lower parts of the centre
pillars, and contains an
analogue G-sensor. 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 outside the instrument panel side. The
passenger’s air bag OFF indicator
lamp is installed in centre panel assembly. The seat belt pre-tensioner
is built into the driver’s
and passenger’s front seat belt retractor.
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.