Mitsubishi Montero (2002-2004). Manual - part 771

GENERAL DESCRIPTION

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52Ba-17

COMPONENT LOCATION

NOTE: The illustration above shows the front impact sensor (LH) and the side impact sensor (RH). The posi-
tion of the front impact sensor (RH) and the side impact sensor (LH) is symmetrical to this.

AC204302

SIDE IMPACT SENSOR

SRS-ECU

DATA LINK CONNECTOR

CENTER
PILLAR

SIDE IMPACT
SENSOR

SRS-ECU

AB

DATA LINK 
CONNECTOR

FRONT IMPACT SENSOR

FRONT 
IMPACT
SENSOR

FRONT BUMPER

SERVICE PRECAUTIONS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52Ba-18

SERVICE PRECAUTIONS

M1524000300303

DANGER

•

In order to avoid injury to yourself or others from 
accidental deployment of the air bag during servic-
ing, read and carefully follow all the precautions 
and procedures described in this manual.

•

After disconnecting the battery cable, wait 60 sec-
onds or more before proceeding with the following 
work. The SRS system is designed to retain 
enough voltage to deploy the air bag for a short 
time even after the battery has been disconnected, 
so serious injury may result from unintended air 
bag deployment if work is done on the SRS system 
immediately after the battery cables are discon-
nected.

WARNING

•

Battery posts, terminals and related accessories 
contain lead and lead compounds. WASH HANDS 
AFTER HANDLING.

•

Do not use any electrical test equipment on or near 
the SRS components, except those specified on 

P.52Ba-22

.

•

Never Attempt to Repair the Following Compo-
nents: SRS-ECU, Clock Spring, Air Bag Module, 
Front Impact sensor, Side Impact Sensor, Seat Belt 
with Pre-tensioner. If any of these components are 
diagnosed as faulty, they should only be replaced, 
in accordance with the INDIVIDUAL COMPONENT 
SERVICE procedures in this manual, starting on 

P.52Ba-26

.

•

Do not attempt to repair the wiring harness con-
nectors of the SRS. If any of the connectors are 
diagnosed as faulty, replace the wiring harness. If 
the wires are diagnosed as faulty, replace or repair 
the wiring harness according to the following 
table.

ACX00583

INSULATING TAPE

BATTERY

BATTERY CABLE (–)

AC

ACX00582AB

SERVICE PRECAUTIONS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52Ba-19

SRS-ECU TERMINAL 
NO.

DESTINATION OF HARNESS

CORRECTIVE ACTION

1, 2, 3, 4

Instrument panel wiring harness 

→ 

Front wiring harness 

→ Front impact 

sensor

Correct or replace each wiring harness.

7

Instrument panel wiring harness

→ 

Ground

Correct or replace the instrument panel 
wiring harness.

8

Instrument panel wiring harness

→ SRS 

warning light

Correct or replace the instrument panel 
wiring harness.

9, 10

Instrument panel wiring harness 

→ Air 

bag module (Front passenger's side)

Correct or replace the instrument panel 
wiring harness.

11, 12

Instrument panel wiring harness 

→ 

Clock spring 

→ Air bag module 

(Driver's side)

Correct or replace each wiring harness. 
Replace the clock spring.

13

Instrument panel wiring harness 

→ 

Junction block (fuse No.8)

Correct or replace the instrument panel 
wiring harness.

16

Instrument panel wiring harness 
→Function block (fuse No.6)

Correct or replace the instrument panel 
wiring harness.

20

Instrument panel wiring harness 

→ 

Data link connector

Correct or replace the instrument panel 
wiring harness.

21, 22

Side-airbag wiring harness 

→ Side-

airbag module (LH)

Correct or replace the side air bag 
wiring harness.

23, 24

Side-airbag wiring harness 

→ Side-

airbag module (RH)

Correct or replace the side air bag 
wiring harness.

27, 28

Side-airbag wiring harness 

→ Floor 

wiring harness

→ Seat belt pre-

tensioner (RH)

Correct or replace each wiring harness.

29, 30

Side-airbag wiring harness 

→ Floor 

wiring harness 

→ Seat belt pre-

tensioner (LH)

Correct or replace each wiring harness.

34, 36

Side-airbag wiring harness 

→ Floor 

wiring harness 

→ Side impact sensor 

(LH)

Correct or replace each wiring harness.

40, 42

Side-airbag wiring harness 

→ Floor 

wiring harness

→ Side impact sensor 

(RH)

Correct or replace each wiring harness.

SERVICE PRECAUTIONS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52Ba-20

WARNING

•

Inspection of the SRS-ECU connector harness 
should be carried out by the following procedure. 
Insert the backprobing tool into connector from 
harness side (rear side), and connect the tester to 
backprobing tool. If any tool other than 
backprobing tool is used, it may cause damage to 
the harness and other components. Furthermore, 
measurement should not be carried out by touch-
ing the backprobing tool directly against the termi-
nals from the front of the connector. The terminals 
are plated to increase their conductivity, so if they 
are touched directly by the backprobing tool, the 
plating may break, which will decrease reliability.

•

The SRS components and seat belt with pre-ten-
sioner should not be subjected to heat, so 
removed the SRS-ECU, driver’s and front passen-
ger’s air bag modules, clock spring, side-airbag 
module, front impact sensor, side impact sensor, 
and seat belt pre-tensioner before drying or baking 
the vehicle after painting.

•

SRS-ECU, air bag module, clock spring, front 
impact sensor, side impact sensor: 93

°C (200°F) 

or more

•

Seat belt with pre-tensioner 90

°C (194°F) or 

more

•

After servicing the SRS system, check the warning 
light operation to make sure that the system func-
tions properly. (Refer to 

P.52Bb-2

.)

•

Make certain that the ignition switch is "LOCK" 
(OFF) position when the scan tool is connected or 
disconnected. 

•

If you have any questions about the SRS system, 
please contact the MMSA Tech Line.

AC006195

SRS-HARNESS CONNECTOR

SRS-ECU HARNESS CONNECTOR
(REAR SIDE)

AB