The Supplemental Restraint System (SRS) and seat
belt with pre-tensioner is designed to supplement the
driver's and passenger's (front) 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 SRS consist of six air bag modules, SRS air bag
control unit (SRS-ECU), front impact sensors, side
impact sensors, SRS warning lamp, clock spring 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 mod-
ule 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 passen-

ger's front pillars to the rear pillars). The SRS-ECU is
located behind the floor console and has a front air
bag safing G-sensor, front air bag analogue G-sen-
sor and a side (curtain) air bag safing G-sensor. The
front impact sensor is installed on front end module.
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
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 per-
sonnel should read this manual carefully before start-
ing any such work.

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GENERAL INFORMATION

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-4

AC601639

AC207323

AC207321

AC207230

AC601468

Driver's air bag
module

Passenger's (front)
air bag module

SRS-ECU

Diagnosis connector

Clock spring

SRS warning lamp

Seat belt with
pre-tensioner

Curtain air bag module

Front impact sensor

SRS-ECU

Side impact sensor

Side-airbag module

SRS warning lamp

<VR-X>

SRS warning lamp

<LS and VR>

<RALLIART version-R>

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SERVICE PRECAUTIONS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-5

SERVICE PRECAUTIONS

M1524000300983

DANGER

In order to avoid injury to yourself or others
from accidental deployment of the air bag
during servicing, read and carefully follow all
the precautions and procedures described in
this manual.

CAUTION

Do not use any electrical test equipment on or
near SRS components, except those specified on

P.52B-9

CAUTION

Never Attempt to Repair the Following Compo-
nents:

• SRS-ECU
• Front impact sensor
• Clock spring
• Driver's and passenger's (front) air bag mod-

ules

• Seat belt with pre-tensioner
• Side impact sensor
• Curtain air bag module

NOTE: If any of these components are diagnosed as
faulty, they should only be replaced, in accordance
with the INDIVIDUAL COMPONENTS SERVICE pro-
cedures in this manual, starting at page

P.52B-139

CAUTION

Do not attempt to repair the wiring harness con-
nectors of the SRS. If a defective wiring harness
is found, repair or replace it by referring to the
table below.

AC300634

SRS-ECU connector

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