Mitsubishi Montero (2004+). Manual - part 1220

SRS CONTROL UNIT (SRS-ECU)

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-215

SRS CONTROL UNIT (SRS-ECU)

REMOVAL AND INSTALLATION

M1524002100446

WARNING

•

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

•

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

•

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

•

Never use an ohmmeter on or near the SRS-ECU, and use only the special test equipment 
described on 

P.52B-205

. 

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

• Front Floor Console Removal (Refer to GROUP 52A, 

Floor Console 

P.52A-7

 ).

Post-installation Operation 
• Front Floor Console Installation (Refer to GROUP 52A, 

Floor Console 

P.52A-7

). 

ACX01413

ACX00583

AC

2

3

4

5

4.9 ± 1.0 N·m
43 ± 8 in-lb

4.9 ± 1.0 N·m
43 ± 8 in-lb

4.9 ± 1.0 N·m
43 ± 8 in-lb

1

REMOVAL STEPS

<<A>>

1.

NEGATIVE (

−) BATTERY CABLE 

CONNECTION

2.

TRANSFER-ECU

3.

CONNECTOR BRACKET

4.

BRACKET MOUNTING BOLT 
(GROUNDING BOLT)

5.

SRS-ECU

INSTALLATION STEPS

>>A<<

5.

SRS-ECU

>>B<<

4.

BRACKET MOUNTING BOLT 
(GROUNDING BOLT)

3.

CONNECTOR BRACKET

2.

TRANSFER-ECU

1.

NEGATIVE (-) BATTERY CABLE 
CONNECTION

>>C<<

•

POST-INSTALLATION 
INSPECTION

SRS CONTROL UNIT (SRS-ECU)

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-216

REMOVAL SERVICE POINT

.

<<A>> NEGATIVE (-) BATTERY CABLE DISCONNECTION

DANGER

Wait at least 60 seconds after disconnecting the bat-
tery cable before doing any further work (Refer to 

P.52B-18

).

WARNING

Battery posts, terminals and related accessories con-
tain lead and lead compounds. WASH HANDS AFTER 
HANDLING.

Disconnect the negative (

−) battery cable from the battery and 

tape the terminal to prevent accidental connection and air 
bag(s) deployment.

INSTALLATION SERVICE POINTS

.

>>A<< PRE-INSTALLATION INSPECTION

WARNING

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

.

>>B<< ATTACHMENT OF BRACKET MOUNTING BOLT 
(GROUNDING BOLT)
Check the head mark "E" on the bolt and attach the grounding 
bolt.

.

ACX00583

INSULATING TAPE

BATTERY

BATTERY CABLE (–)

AC

ACX00599AB

EARTH BOLT HEAD MARK

AIR BAG MODULE(S) AND CLOCK SPRING

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-217

>>C<< POST-INSTALLATION INSPECTION 
1. Reconnect the negative (

−) battery cable. 

2. Turn the ignition key to the "ON" position. 
3. Does the "SRS" warning light illuminate for approximately 

seven seconds after turning "OFF?" 

4. If yes, the SRS system is functioning properly.

If no, refer to page 

P.52B-22

. 

INSPECTION

M1524002200391

WARNING

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

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

deformation. 

• Check the SRS-ECU connector for damage, and the termi-

nals for deformation. 

NOTE: Refer to for inspection of SRS-ECU for other than phys-
ical damage. 

AIR BAG MODULE(S) AND CLOCK SPRING

REMOVAL AND INSTALLATION 

M1524002400533

WARNING

•

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

•

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.

•

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. 

•

Do not expose the air bag modules to temperatures over 93

°

C(200 

°

F). 

•

After deployment of an air bag, replace the air bag modules. Check the clock spring and if 
faulty, replace it with a new part. 

•

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

•

An undeployed air bag module should only be disposed of in accordance with the proce-
dures described on 

P.52B-234

. 

<SIDE-AIRBAG MODULE>

For removal and installation of the front seatback assembly with side-airbag module, refer to GROUP 52A, 
Front seat 

P.52A-14

.

ACX01667

AT

TEMP

SRS

P
R
N
D

5
4
3
2
1

x1000r/min

2

3

4

5

6

7

8

1

AC

SRS WARNING LIGHT

AIR BAG MODULE(S) AND CLOCK SPRING

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-218

<AIR BAG MODULE (DRIVER'S SIDE) AND CLOCK SPRING>

Pre-removal Operation
• After setting the steering wheel and the front wheels to the 

straight ahead position, remove the ignition key. 

AC204150

AC204150

6

4

3

3.9 ± 0.4 N·m
35 ± 3.5 in-lb

3.9 ± 0.4 N·m
35 ± 3.5 in-lb

0.69 ± 0.15 N·m
6.1 ± 1.3 in-lb

5

A

A

B

B

AB

50 ± 5 N·m
37 ± 4 ft-lb

1

2

COLUMN 
SWITCH

6

4

STUD

2

STUD

4

STUD

STUD

SECTION A - A

SECTION B - B

SECTION C - C

SECTION D - D

C

C

D

D

NOTE
          :STUD POSITION

2

7