GENERAL INFORMATION
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-3
GENERAL INFORMATION
M1524000101528
WARNING
Improper service could result in serious
injury of the service personnel or the pas-
senger.
.
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
frontal collision.
.
The SRS front air bags from an advanced air bag
system together with sensors at the vehicle and sen-
sors attached to front seats.
.
With the knee air bag system, when an impact
exceeds the threshold upon a frontal collision, and
the cushion air bag is instantaneously inflated for
better protection of the driver.
.
Side-air bag systems in the front seats are activated
when side impacts exceed a criteria to protect the
occupants’ upper bodies.
.
The curtain air bag system operates together with
the side-air bag to protect the heads of passengers
in the front and second seats.
.
The seat belts with pre-tensioner work simulta-
neously with the SRS. The seat belt incorporating the
pre-tensioner automatically winds the seat belt 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-ten-
sioner.
.
The SRS consists of driver’s and passenger’s (front)
air bag modules, knee air bag module, side-air bag
modules, curtain air bag modules, SRS air bag con-
trol unit (SRS-ECU), two front impact sensors, two
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, weight sensor and
occupant classification-ECU. Driver’s and passen-
ger’s (front) air bag modules are located in the center
of the steering wheel and above the glove box. The
knee air bag module is installed to the instrument
panel cover lower under the steering column.
Side-air bags are located inside the front seatback
frame. 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-air bag safing G-sensor. The
front impact sensor is assembled in the front end
upper bar 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 vehi-
cle. 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 weight 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 center panel, and illu-
minates when the passenger seat air bag is inactive.
The passenger’s seat belt warning light is installed to
the lower right of the center panel, and illuminates
when the passenger is not wearing the seat belt. The
seat belt switch detects whether the seat belt is
used.
Only authorized service personnel should do work on
or around the SRS components. Those service per-
sonnel should read this manual carefully before start-
ing any such work.
.