Mitsubishi Montero Sport (2004+). Manual - part 753

FRONT IMPACT SENSORS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-81

INSPECTION

M1524001600299

FRONT IMPACT SENSOR CHECK

WARNING

If a dent, crack, deformation or rust is detected, 
replace with a new sensor. 

1. Check the front impact sensor for dents, cracks, deformation 

or rust. 

WARNING

If the resistance value shows short-circuit or 
open-circuit, be sure to replace the front impact sen-
sor with a new one.

2. Check for short-circuit or open-circuit between the front 

impact sensor terminals.
When short-circuit: 1 ohm and less
When open-circuit: 1 mega ohm and above

3. Check for continuity between the terminal and the bracket.

If there is continuity, it shows insufficient insulation of the 
sensor. Replace the sensor with a new one.

4. Check for deformation and rust on the fender shield panel.

1

2

AC003894 AC

1

2

1

2

AC003895

AC

SRS CONTROL UNIT (SRS-ECU)

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-82

SRS CONTROL UNIT (SRS-ECU)

M1524002100457

REMOVAL AND INSTALLATION

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-71

 and 

P.52B-73

. 

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

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

Console 

P.52A-40

.)

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

Console 

P.52A-40

.) 

AC003311

4.9 N·m

43 in-lb

4.9 N·m

43 in-lb

4.9 N·m

43 in-lb

2

3

1

AB

REMOVAL STEPS

<<A>>

1.

NEGATIVE (

−) BATTERY CABLE 

CONNECTION

2.

SRS-ECU BRACKET

3.

SRS-ECU 

INSTALLATION STEPS

>>A<<

3.

SRS-ECU

2.

SRS-ECU BRACKET

1.

NEGATIVE (

−) BATTERY CABLE 

CONNECTION

>>B<<

•

POST-INSTALLATION 
INSPECTION

SRS CONTROL UNIT (SRS-ECU)

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-83

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-17

.)

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 deploy-
ment.

INSTALLATION SERVICE POINTS

.

>>A<< SRS-ECU INSPECTION

WARNING

The SRS may not active 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<< 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 7 

seconds, and then remain off for at least 5 seconds after 
turning "OFF?" 

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

If no, consult 

P.52B-61

. 

ACX00583

INSULATING TAPE

BATTERY

BATTERY CABLE (–)

AC

AC003277AD

SRS WARNING LIGHT

AIR BAG MODULES AND CLOCK SPRING

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-84

INSPECTION

M1524002200197

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 

P.52B-23

 for inspection of SRS-ECU for 

other than physical damage. 

AIR BAG MODULES AND CLOCK SPRING

REMOVAL AND INSTALLATION

M1524002400544

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 (Refer to 

P.52B-96

.)