Mitsubishi Lancer Evolution VI. Manual - part 93

SRS  – 

SRS Maintenance

52B-18

BODY WIRING HARNESS

*

Body wiring harness

NOTE
*: Vehicles with front passenger’s air bag

1.

Check connector for poor connection.

2.

Check harnesses for binds, connectors for damage, and
terminals for deformation.
REPLACE ANY CONNECTORS OR HARNESS THAT
FAIL THE VISUAL INSPECTION. (Refer to P.52B-3.)

Caution
The SRS may not activate if SRS harnesses or
connectors are damaged or improperly connected,
which could result in serious injury or death to the
vehicle’s driver or front passenger.

POST-INSTALLATION INSPECTION

Reconnect the negative battery terminal. Turn the ignition
key to the “ON” position. Does the SRS warning lamp illuminate
for about 7 seconds, turn off and then remain extinguished
for at least 5 seconds? If yes, SRS system is functioning
properly. If no, consult page 52B-6.

SRS warning lamp

SRS  – 

Post-collision Diagnosis

52B-19

POST-COLLISION DIAGNOSIS

To inspect and service the SRS after a collision (whether
or not the air bags have deployed), perform the following
steps.

SRS-ECU MEMORY CHECK

1.

Connect the MUT-

II

 to the diagnosis connector (16-pin).

Caution
Make certain that the ignition switch is OFF when
the MUT-

II

 is connected or disconnected.

2.

Read (and write down) all displayed diagnosis codes.
(Refer to P.52B-6.)

NOTE
If the battery power supply has been disconnected or
disrupted by the collision, the MUT-

II

 cannot communicate

with the SRS-ECU. Inspect and, if necessary, repair the
body wiring harness before proceeding further.

3.

Read the data list (fault duration and how many times
memories are erased) using the MUT-

II

.

Data list

No

Service Data Item

Applicability

92

Number indicating houw often the memory is cleared

Maximum time to be stored: 250

93

How long a problem has lasted (How long it takes
from the occurrence of the problem till the first igniting
signal)

Maximum time to be stored: 9,999 minutes
(approximately 7 days)

94

How long a problem has lasted (How long it takes
from the first igniting signal till now)

4.

Erase the diagnosis codes and after waiting 5 seconds
or more read (and write down) all displayed diagnosis
codes. (Refer to P.52B-6.)

SRS  – 

Post-collision Diagnosis

52B-20

REPAIR PROCEDURE

WHEN AIR BAG DEPLOYS IN A COLLISION.

1.

Replace the following parts with new ones.

D

SRS-ECU (Refer to P.52B-24.)

D

Air bag module (Refer to P.52B-25.)

2.

Check the following parts and replace if there are any
malfunctions.

D

Clock spring (Refer to P.52B-25.)

D

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.

3.

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

WHEN AIR BAG DOES NOT DEPLOY IN LOW-SPEED
COLLISION.

Check the SRS components. If the SRS components are
showing any visible damage such as dents, cracks, or
deformation, replace them with new ones. Concerning parts
removed for inspection, replacement with new parts and
cautionary points for working, refer to appropriate INDIVIDUAL
COMPONENT SERVICE, P.52B-22.

SRS  – 

Post-collision Diagnosis

52B-21

SRS-ECU

1.

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

2.

Check connector for damage, and terminals for
deformation.

Air bag modules

1.

Check pad cover for dents, cracks or deformation.

2.

Check connector for damage, terminals deformities, and
harness for binds.

3.

Check air bag inflator case for dents, cracks or deformities.

4.

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

Clock spring

1.

Check clock spring connectors and protective tube for
damage, and terminals for deformation.

2.

Visually check the case for damage.

SRS-ECU

<Driver’s side>

Connector

<Front passenger’s side>

Inflator case

Connector

Inflator case

Case

Protective tube

Protective tube