Mitsubishi Outlander (2003+). Manual — part 4

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

GENERAL

00-27

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

M1001009800020

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 SRS consist of four air bag modules, SRS air
bag control unit (SRS-ECU), two front impact
sensors, two 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. Side air bag are
located inside the front seatback assemblies. 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 and a side
air bag safing G-sensor. The front impact sensor is
assembled outside the headlamp support panel to
monitor impact in case of front impact. The side
impact sensors inside the centre pillars monitor the
shock incurred by the sides of the vehicle. 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
personnel should read this manual carefully before
starting any such work.

AC301343

SRS warning lamp

Driver's air bag
module

Clock spring

Passenger's (front)
air bag module

Side air bag module

Side impact sensor

Side air bag module

Side impact sensor

Front impact sensor

SRS-ECU

Seat belt with pre-tensioner

AB

SRS SERVICE PRECAUTIONS

GENERAL

00-28

SRS SERVICE PRECAUTIONS

M1001006000047

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
Components:

1. SRS air bag control unit (SRS-ECU)
2. Front impact sensor
3. Clock spring
4. Driver's and front passenger's air bag

modules

5. Side air bag module
6. Side impact sensor
7. Seat belt with pre-tensioner

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

P.52B-174

.

CAUTION

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

AC300634

SRS-ECU connector

AB

SRS-ECU terminal No.

Destination of harness

Remedy

1, 2

Instrument panel wiring harness

→

Front wiring harness (RH)

→

Front

impact sensor (RH)

Correct or replace each wiring
harness.

3, 4

Instrument panel wiring harness

→

Front wiring harness (LH)

→

Front

impact sensor (LH)

Correct or replace each wiring
harness.

7

Instrument panel wiring harness

→

Earth

Correct or replace the instrument
panel wiring harness.

8

Instrument panel wiring harness

→

SRS warning lamp

Correct or replace the instrument
panel wiring harness.

9, 10

Instrument panel wiring harness

→

Air bag module (Front passenger's
side)

Correct or replace the instrument
panel wiring harness.

11, 12

Instrument panel wiring harness

→

Clock spring

→

Air bag module

(Driver's side)

Correct or replace instrument panel
wiring harness. Replace the clock
spring.

13

Instrument panel wiring harness

→

Junction block (fuse No.3)

Correct or replace the instrument
panel wiring harness.

SRS SERVICE PRECAUTIONS

GENERAL

00-29

DANGER

After disconnecting the battery cable, wait 60
seconds or more before proceeding with the
following work. In addition, insulate the
negative battery terminal with a tape. The
condenser inside the SRS-ECU is designed
to retain enough voltage to deploy the air
bag for a short time even after the battery
has been disconnected, so serious injury
may result from unintended air bag
deployment if work is done on the SRS
system immediately after the battery cables
are disconnected.

16

Instrument panel wiring harness

→

Junction block (fuse No.2)

Correct or replace the instrument
panel wiring harness.

20

Instrument panel wiring harness

→

Diagnosis connector

Correct or replace the instrument
panel wiring harness.

21, 22

Floor wiring harness (RH)

→

Side air

bag module (LH)

Correct or replace the floor wiring
harness.

23, 24

Floor wiring harness (RH)

→

Side air

bag module (RH)

Correct or replace the floor wiring
harness.

27, 28

Floor wiring harness (RH)

→

Seat

belt pre-tensioner (Front
passenger's side)

Connect or replace the floor wiring
harness.

29, 30

Floor wiring harness (LH)

→

Seat

belt pre-tensioner (driver's side)

Connect or replace the floor wiring
harness.

34, 36

Floor wiring harness (LH)

→

Side

impact sensor (LH)

Connect or replace the floor wiring
harness.

40, 42

Floor wiring harness (RH)

→

Side

impact sensor (RH)

Connect or replace the floor wiring
harness.

SRS-ECU terminal No.

Destination of harness

Remedy

AC300580AB

Insulating tape

Battery

Battery cable

SRS SERVICE PRECAUTIONS

GENERAL

00-30

CAUTION

The SRS components and seat belt with
pre-tensioner should not be subjected to heat, so
remove the SRS-ECU, driver’s and front
passenger’s air bag modules, clock spring, side
air bag modules, and seat belt pre-tensioner
before drying or baking the vehicle after painting.

•

SRS-ECU, air bag modules, clock spring,
impact sensors: 93

°

C or more

•

Seat belt with pre-tensioner 90

°

C or more

CAUTION

Whenever you finish servicing the SRS, always
erase the diagnosis code and check warning
lamp operation to make sure that the system
functions properly.

CAUTION

If checks are carried out by using the SRS-ECU
harness connector, observe the following
procedures: Insert the special tool (probe in the
harness set) MB991222 into connector from
harness side (rear side), and connect the tester
to this probe. If any tool than special tool is used,
damage to the harness and other components
will result. Never insert the probe directly to the
terminals from the front of the connector. The
terminals are plated to increase their
conductivity, so that if they are touched directly
by the probe, the plating may break, which will
cause drops in reliability.

AC300673AB

SRS-Harness connector

SRS-ECU harness connector
(rear side)