Mitsubishi Lancer Evolution IX. Manual - part 651

SEAT BELTS WITH PRE-TENSIONER

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-117

SEAT BELTS WITH PRE-TENSIONER

REMOVAL AND INSTALLATION

M1524004100390

WARNING

•

Never attempt to disassemble or repair the seat belt pre-tensioner. If faulty, replace it.

•

Be extremely careful when handling the seat with pre-tensioner. Do not subject it to 
shocks, drop it, bring it close to strong magnets or allow contact with water, grease or oil. 
Always replace it with a new part if any dents, cracks or deformation is found.

•

Do not place anything on top of the seat belt pre-tensioner.

•

Do not expose the seat belt with pre-tensioner to temperatures over 90

°

C.

•

After operating the seat belt pre-tensioner, replace the seat belt with pre-tensioner with a 
new part.

•

Gloves and protective goggles should be worn when handling a seat belt pre-tensioner 
once it has been used.

•

If disposing of a seat belt with pre-tensioner which has not yet been operated, its seat belt 
pre-tensioner should be operated first before disposal (Refer to 

P.52B-120

).

Pre-removal Operation
• Turn the ignition switch to the "LOCK" (OFF) position.

• Disconnect the Negative Battery Terminal.

AC101710 AC

1

2

3

4

5

6

44 ± 10 N·m

44 ± 10 N·m

SEAT BELTS WITH PRE-TENSIONER

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-118

NOTE: The figure shows the seat belt with pre-ten-
sioner (RH).

REMOVAL SERVICE POINTS
<<A>>PRE-TENSIONER CONNECTOR 
DISCONNECTION

1. Use a flat-tipped screwdriver to pull out forward 

and unlock the locking button of the harness-side 
connector.

2. Disconnect the pre-tensioner connector.

INSTALLATION SERVICE POINTS
>>A<< PRE-INSTALLATION INSPECTION

WARNING

When discarding the seat belt with pre-ten-
sioner, operate the pre-tensioner as speci-
fied in the service procedure (Refer to 

P.52B-120

).

1. Even new seat belt with pre-tensioner require 

inspection before installation.

2. Connect the negative battery cable.

CAUTION

To prevent damage to M.U.T.-II/III, always turn the 
ignition, switch to the “LOCK” (OFF) position 
before connecting or disconnecting M.U.T.-II/III.
3. Connect M.U.T.-II/III to the diagnosis connector.

Removal steps 

1. Sash guide cover
2. Seat belt shoulder anchor bolt
3. Seat belt lower anchor bolt
•

Centre pillar trim, lower (Refer to 
GROUP 52A 

− Trims 

P.52A-10

).

<<

A

>>

4. Pre-tensioner connector connection
5. Bracket
6. Seat belt with pre-tensioner

Installation steps 

>>

A

<< • Pre-installation inspection

6. Seat belt with pre-tensioner
5. Bracket

>>

B

<< 4. Pre-tensioner connector connection

•

Centre pillar trim, lower (Refer to 
GROUP 52A 

− Trims 

P.52A-10

).

3. Seat belt lower anchor bolt
2. Seat belt shoulder anchor bolt
1. Sash guide cover
•

Negative battery cable connection

>>

C

<< • Post-installation inspection

AC300147 AS

Pre-tensioner
connector

Flat-tipped 
screwdriver

Locking button

Harness side connector

AC304777

Steering shaft

AB

MB991502

<Using the M.U.T.-II>

AC211686

MB991911

16-PIN

MB991827

MB991824 

AE

<Using the M.U.T.-III>

SEAT BELTS WITH PRE-TENSIONER

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-119

4. Turn the ignition switch to the ON position.
5. Check diagnosis codes using M.U.T.-II/III to 

ensure that the SRS operates properly.
Confirm that the diagnosis codes other than 26 
and 28 are not set.

6. Turn the ignition switch to "LOCK" (OFF) position.

DANGER

Wait at least 60 seconds after the disconnec-
tion of the battery cable before any further 
job (Refer to 

P.52B-3

).

7. Disconnect the negative battery cable and 

insulate with tape.

>>B<< PRE-TENSIONER CONNECTOR 
CONNECTION

Connect the pretensioner connector then securely 
lock the locking button of the harness-side connec-
tor.

>> C<< POST-INSTALLATION 
INSPECTION

1. Connect the negative battery cable.
2. Turn the ignition switch to "ON" position.

3. Does the SRS warning lamp illuminate for about 7 

seconds and then goes out?

4. If no, refer to troubleshooting (Refer to

P.52B-9

).

INSPECTION

M1524004200245

WARNING

•

If any component damage is found during 
the following inspection, replace the seat 
belt with pre-tensioner with a new one. 
Dispose of the old one according to the 
specified procedure (Refer to 

P.52B-120

).

•

Never attempt to measure the circuit 
resistance of the seat belt pre-tensioner 
even if you are using the specified tester. 
If the circuit resistance is measured with a 
tester, accidental seat belt pre-tensioner 
operation will result in serious personal 
injury.

1. Check the seat belt pre-tensioner deployment 

section for dents and deformation.

2. Check the harness and connector for damage and 

the terminals for deformation.

AC311044

SRS warning lamp

AB

AIR BAG MODULE AND SEAT BELT PRE-TENSIONER DISPOSAL PROCEDURES

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-120

AIR BAG MODULE AND SEAT BELT PRE-TENSIONER 

DISPOSAL PROCEDURES

M1524001200989

Before disposing of an air bag or a vehicle equipped 
with an air bag, follow the procedures below to 
deploy the air bag.

UNDEPLOYED AIR BAG MODULE DIS-
POSAL

WARNING

•

If the vehicle is to be scrapped or other-
wise disposed of, deploy the air bags and 
operate the seat belt pre-tensioner inside 
the vehicle. If the vehicle will continue to 
be used and only the air bag modules and 
seat belt pre-tensioner are to be disposed 
of, deploy the air bags and operate the 
seat belt pre-tensioner outside the vehi-
cle.

•

Since a large amount of smoke is pro-
duced when the air bag is deployed and 
the seat belt pre-tensioner is operated, 
avoid residential areas whenever possi-
ble.

•

Since there is loud noise when the air 
bags are deployed and when the seat belt 
pre-tensioner are operated, avoid residen-
tial areas whenever possible. If anyone is 
nearby, give warning of the impending 
noise.

•

Suitable ear protection should be worn by 
personnel performing these procedures 
or by people in the immediate area.

DEPLOYMENT INSIDE THE VEHICLE 
(WHEN DISPOSING OF A VEHICLE) 
<DRIVER'S AIR BAG MODULE>

1. Move the vehicle to an isolated spot.

DANGER

Wait at least 60 seconds after the disconnec-
tion of the battery cable before any further 
job (Refer to 

P.52B-3

).

2. Disconnect the negative and positive battery 

cables from the battery terminals, and then 
remove the battery from the vehicle.

3. Remove the column cover lower (Refer to 

GROUP 37 

− Steering shaft 

P.37-15

).

4. Remove the connection between the C-205 clock 

spring connector (4-pin) and the harness side 
connector (4-pin, yellow).
NOTE: Once disconnected from the instrument 
panel wiring harness, both electrodes of the clock 
spring connector short automatically. This pre-
vents the driver's air bag from accidental deploy-
ment caused by static, etc.

5. Obtain two suitable wires, which are 6 meters or 

longer, as deployment wires. Then connect the 
wires at one end to short.

6. Touch the vehicle's body with bare hands to 

discharge static in you.

AC300379

C-205 Clock spring
connector (4-pin)

C-205 Harness side
connector
(4-pin, yellow)

AD

AC300381AD

Deployment wires

Connection

6 m or longer

AC300384

Deployment wire

AC

Insulator tape

C-205 Clock spring
connector (4-pin)

Connection

C-205 Harness side
connector
(4-pin, yellow)