Mitsubishi Montero Sport (2004+). Manual — part 751

TEST EQUIPMENT

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-73

TEST EQUIPMENT

M1524000800201

SRS MAINTENANCE

M1524003900199

The SRS must be inspected by an authorized dealer up to 10
years after the date of vehicle registration.
(Refer to GROUP 00, Maintenance Service

P.00-60

.)

MR203491 or MB628919
SRS air bag adapter
harness B

General service tool Deployment of air bag

module (driver's side)
outside the vehicle

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

AC004626

TOOL

NAME

USE

Digital multi-meter
Use a multi-meter for which the
maximum test current is 2 mA or less at
the minimum range of resistance
measurement

Checking the SRS electrical circuitry with
SRS check harness

AC000019AB

POST-COLLISION DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-74

POST-COLLISION DIAGNOSIS

M1524001100540

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

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector

(16-pin).
NOTE: If the battery power supply has been disconnected or
disrupted by the collision, scan tool MB991958 cannot com-
municate with the SRS-ECU. Check the battery then check
and, if necessary, repair the front wiring harness and the
instrument panel wiring harness before proceeding.

2. Read (and write down) all displayed DTC. (Refer to

P.52B-23

.)

3. Read the data list (fault duration and how many times

memories are erased) using scan tool MB991958.

DATA LIST

4. Erase DTC's and after waiting 5 seconds or more read (and

write down) all displayed DTC's. (Refer to

P.52B-23

.)

AK303629AB

MB991911

MB991827

MB991824

16-PIN

DTC

SERVICE DATA ITEM

APPLICABILITY

92

Number indicating how 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 air bag squib
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 air bag
squib igniting signal till now.)

POST-COLLISION DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-75

REPAIR PROCEDUR

.

WHEN AIR BAGS DEPLOYS IN A COLLISION.
1. Replace the following parts with new ones.

• Front impact sensors (Refer to

P.52B-79

.)

• SRS-ECU (Refer to

P.52B-82

.)

• Air bag module (Refer to

P.52B-84

.)

• Seat belt pre-tensioner (Refer to

P.52B-93

.)

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

malfunctions.

• Clock spring (Refer to

P.52B-84

.)

• Steering wheel, steering column and intermediate joint

(1) Check the wiring harness (built into the steering wheel)

and connectors for damage, and terminals for
deformation.

(2) Install the air bag module to check fit or alignment with

the steering wheel.

(3) Check the steering wheel for noise, binds or difficult

operation and excessive free play.

(4) Check the steering column shaft shock absorbing

mechanism (Refer to GROUP 37A, On-Vehicle Service

−

Steering Column Shaft Assembly Shock Absorbing
Mechanism Check

P.37A-23

).

3. Check the wiring harnesses for binding, the connectors for

damage, poor connections, and the terminals for
deformation. (Refer to

P.52B-17

.)

.

WHEN AIR BAG DOES NOT DEPLOY IN LOW-SPEED
COLLISION.
Check the SRS components. If the SRS components are show-
ing 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 the appropriate INDIVIDUAL COMPO-
NENT SERVICE,

P.52B-78

.

.

Front impact sensors
1. Check the fender shield panel for deformation or rust.
2. Check the front impact sensor for dents, cracks, deformation

or rust.

3. Check the sensor harnesses for binding, the connectors for

damage, and the terminals for deformation.

.

AC003306

FENDER
SHIELD PANEL

FRONT IMPACT
SENSOR

FORWARD

AC

POST-COLLISION DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-76

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

deformation.

2. Check the connector for damage, and the terminals for

deformation.

.

Air bag modules
1. Check the pad cover for dents, cracks or deformation.
2. Check the connector for damage, terminals for deformities,

and the harness for binding.

3. Check the air bag inflator case for dents, cracks or

deformities.

4. Install the air bag module (driver's side) to the steering

wheel to check fit or alignment with the steering wheel.

5. Install the air bag module (front passenger's side) to the

instrument panel and crossmember to check fit or alignment.

6. Install the air bag module cover (front passenger's side) to

the instrument panel to check fit or alignment.

.

Clock spring
1. Check the clock spring connectors and protective tubes for

damage, and the terminals for deformation.

2. Visually check the case for damage.

.

ACX00587AB

SRS-ECU

AC003308 AB

<DRIVER'S SIDE>

<FRONT PASSECGER'S SIDE>

CONNECTOR

INFLATOR CASE

COVER

INFLATOR CASE

CONNECTOR

AC003831AB

CASE

PROTECTIVE TUBES