Mitsubishi Lancer Evolution VI. Manual - part 94

SRS  – 

Post-collision Diagnosis / Individual Component Service

52B-22

Steering wheel, steering column and intermediate joint

1.

Check wiring harness (built into steering wheel) and
connectors for damage, and terminals for deformation.

2.

Install air bag module to check fit or alignment with steering
wheel.

3.

Check steering wheel for noise, binds or difficult operation
and excessive free play.

Harness connector (body wiring harness)

Check harnesses for binding, connectors for damage, poor
connection, and terminals for deformation. (Refer to P.52B-18.)

INDIVIDUAL COMPONENT SERVICE

If the SRS components are to be removed or replaced as a result of maintenance, troubleshooting,
etc., follow each procedure (P.52B-24 – P.52B-31)

Caution
1.

SRS components should not be subjected to hear over 93

_

C, so remove the SRS-ECU, air

bag module and clock spring before drying or baking the vehicle after painting.
Recheck SRS system operability after re-installing them.

2.

If the SRS components are removed for the purpose of check, sheet metal repair, painting,
etc., they should be stored in a clean, dry place until they are reinstalled.

SRS  – 

Warning/Caution Labels

52B-23

WARNING/CAUTION LABELS

A number of caution labels related to the SRS are
found in the vehicle, as shown in the following

illustration. Follow label instructions when servicing
SRS. If labels are dirty or damaged, replace them.

Steering wheel

Air bag module (driver’s side)

Clock spring

Glove box

Sun visor

SRS-ECU

Steering gear and linkage

Air bag module 
(front passenger’s side)

SRS  – 

SRS-ECU

52B-24

SRS AIR BAG CONTROL UNIT (SRS-ECU)

Caution
1.

Disconnect the battery (–) terminal and wait
for 60 seconds or more before starting work.
Furthermore, the disconnected battery
terminal should be covered with tape to
insulate it. (Refer to P.52B-3.)

2.

Never attempt to disassemble or repair the
SRS-ECU. If faulty, replace it.

3.

Do not drop or subject the SRS-ECU to
impact or vibration.
If denting, cracking, deformation, or rust
are discovered in the SRS-ECU, replace it
with a new SRS-ECU. Discard the old one.

4.

After deployment of an air bag, replace the
SRS-ECU with a new one.

REMOVAL AND INSTALLATION

Pre-removal Operation

D

Turn the ignition key to the LOCK (OFF) position.

D

Negative (–) battery cable connection

1

4.9 Nm

Removal steps

D

Floor console

1. SRS-ECU

Installation steps

"

B

A D

Post-installation inspection

D

Negative (–) battery cable connection

"

A

A

1. SRS-ECU

D

Floor console

SRS  – 

SRS-ECU / Air Bag Modules and Clock Spring

52B-25

INSTALLATION SERVICE POINTS

"

A

A

SRS-ECU INSTALLATION

Caution
The SRS may not activate if SRS-ECU is not installed
properly, which could result in serious injury or death
to the vehicle’s driver or front passenger.

"

B

A

POST-INSTALLATION INSPECTION

1.

Reconnect the negative battery terminal.

2.

Turn the ignition key to the “ON” position.

3.

Does the “SRS” warning lamp illuminate for about 7
seconds, and then remain extinguished for at least 5
seconds after turning OFF?

4.

If yes, SRS system is functioning properly.
If no, consult page 52B-6.

INSPECTION

D

Check the SRS-ECU and brackets for dents, cracks or
deformation.

D

Check connector for damage, and terminals for
deformation.

Caution
If a dent, crack, deformation or rust is discovered,
replace the SRS-ECU with a new one.

NOTE
For checking of the SRS-ECU other than described above,
refer to the section concerning troubleshooting. (Refer
to P.52B-6.)

AIR BAG MODULES AND CLOCK SPRING

Caution
1.

Disconnect the battery (–) terminal and wait
for 60 seconds or more before starting work.
Furthermore, the disconnected battery
terminal should be covered with tape to
insulate it. (Refer to P.52B-3.)

2.

Never attempt to disassemble or repair the
air bag modules or clock spring.
If faulty, replace it.

3.

Do not drop the air bag modules or clock
spring or allow contact with water, grease
or oil.
Replace it if a dent, crack, deformation or
rust is detected.

4.

The air bag modules should be stored on
a flat surface and placed so that the pad
surface is facing upward.
Do not place anything on top of it.

5.

Do not expose the air bag modules to
temperatures over 93

_

C.

6.

Both driver’s side and front passenger’s
side air bag modules should be replaced
with new ones once the respective air bags
were deployed. The clock springs should
also be checked and replaced with new ones
if considered abnormal.

7.

Wear gloves and safety glasses when
handling air bags that have already
deployed.

8.

An undeployed air bag module should only
be disposed of in accordance with the
procedures (Refer to P.52B-32.)

SRS warning lamp