Mitsubishi Pajero Pinin. Manual - part 312

SRS – 

Post-collision Diagnosis

52B-27

POST-COLLISION DIAGNOSIS

Whether or not the air bags have deployed, check and service
the vehicle after collision as follows:

SRS-ECU MEMORY CHECK

1.

Connect the MUT-

II

 to the diagnosis connector. (Refer

to GROUP 00 – How to Use Troubleshooting/Inspection
Service Points.)

Caution
Refer to that the ignition switch is LOCK (OFF) when
connecting or disconnecting MUT-

II

.

2.

Read (and write down) all displayed diagnosis codes.
(Refer to P.52B-8.)

NOTE
If battery power supply has been shut down by the collision,
the MUT-

II

 cannot communicate with the SRS-ECU. Check

and, repair if necessary, the instrument panel wiring
harness before the next job.

3.

Use the the MUT-

II 

to read the data list (how long trouble(s)

have continued and how often memory have been erased).

Data list

No

Service Data Item

Applicability

92

Number indication how often the memory is cleared.

Maximum time to be stored: 250

93

How long problem have 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 problem(s) have lasted (How long it takes
from the first air bag squib igniting signal till now.)

4.

Erase the diagnosis codes and after waiting 5 seconds
or more read (and write down) all displayed diagnosis
codes. (Refer to P.52B-8.)

REPAIR PROCEDURE

WHEN AIR BAGS (DRIVER’S SIDE AND FRONT
PASSENGER’S SIDE) DEPLOY OR SEAT BELT
PRE-TENSIONER OPERATES IN A COLLISION.
1.

Replace the following parts with new ones.

D

SRS-ECU (Refer to P.52B-34.)

D

Driver’s side air bag module (Refer to P.52B-36.)

D

Front passenger’s side air bag module (Refer to
P.52B-36.)

D

Front impact sensor (Refer to P.52B-32.)

D

Seat belt with pre-tensioner (Refer to P.52B-44.)

SRS – 

Post-collision Diagnosis

52B-28

2.

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

D

Clock spring (Refer to P.52B-36.)

D

Steering wheel, steering column and intermediate joint
(1) Check wiring harness (built into steering wheel)

and connectors for damage, and terminals for
deformation.

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

with steering wheel.

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

operation and excessive free play.

3.

Check harnesses for binding, connectors for damage, poor
connections, and terminals for deformation.
(Refer to P.52B-4.)

DEPLOYED SIDE AIR BAGS

1.

Replace the following parts with new ones:

D

SRS-ECU (Refer to P.52B-34.)

D

Side impact sensors (Refer to P.52B-46.)

D

Front seat back assemblies (Refer to P.52B-36.)

2.

Check harnesses for binding, connectors for damage, poor
connections, and terminals for deformation. (Refer to
P.52B-4.)

UNDEPLOYED AIR BAGS IN LOW-SPEED COLLISION

Check the SRS components. If visible damage such as dents,
cracks, or deformation are found on the SRS components,
replace them with new ones. Concerning parts removed for
inspection, replacement with new parts and cautions in
working, refer to INDIVIDUAL COMPONENT SERVICE,
P.52B-30.

SRS-ECU

1.

Check the SRS-ECU case and bracket for dents, cracks
or deformation.

2.

Check the connector for damage, and terminals for
deformation.

3.

Check the SRS-ECU and bracket for proper installation.

SRS-ECU

SRS – 

Post-collision Diagnosis

52B-29

FRONT IMPACT SENSORS

1.

Check the front side member for deformation or rest.

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.

Driver’s and passenger’s air bag modules

1.

Check the covers for dents, cracks or deformation.

2.

Check the connectors for damage, the terminals
deformities, and the harness for binds.

3.

Check the air bag inflator cases for dents, cracks or
deformities.

4.

Check the air bag modules for proper installation.

Clock spring

1.

Check the clock spring connectors and protective tubes
for damage, and terminals for deformation.

2.

Visually check the case for damage.

Steering wheel, steering column and intermediate joint

1.

Check the driver’s air bag module for proper installation
to the steering wheel.

2.

Check the steering wheel for noise, binds or difficult
operation and excessive free play.

Harness connector (Instrument panel wiring harness)

Check the harness for binds, the connector for damage and
the terminals for deformation. (Refer to P.52B-4.)

Front side member

Front impact
sensor

Forward

<Driver’s side>

<Front passenger’s side>

Inflator case

Connector

Inflator case

Connector

Protective
tubes

Case

SRS – 

Post-collision Diagnosis/Individual Component Service

52B-30

Front seat back assembly (side air bag module)

1.

Check the side air bag module deployment section in the
seat for dents and deformation.

2.

Check the harness for binds, the connector for damage
and the terminals for deformation.

Side impact sensor

1.

Check the quarter panel, inner for deformation or rust.

2.

Check the side impact sensors for dents, cracks,
deformation and rust.

3.

Check the connector for damage and the terminals for
deformation.

NOTE
The figures show side impact sensors (L.H.).

Harness connector (Instrument panel wiring harness
and side air bag wiring harness)

Check the harness for binds, the connector for damage and
the terminals for deformation. (Refer to P.52B-4.)

Seat belt with pre-tensioner

1.

Check the seat belt for damage or deformation.

2.

Check the pre-tensioner for cracks or deformation.

3.

Check that the unit is installed correctly to the vehicle
body.

INDIVIDUAL COMPONENT SERVICE

If the SRS components and seat belt with pre-tensioner are to be removed or replaced as a result of
maintenance, troubleshooting, etc., follow each procedure (P.52B-32 – P.52B-47.)

Caution
1.

SRS components and seat belt with pre-tensioner should not be subjected to heat, so remove
the front impact sensor, SRS-ECU, air bag modules (driver’s side and front passenger’s side),
front seat assemblies (side air bag module), clock spring, side impact sensors and seat belts
with pre-tensioner before drying or baking the vehicle after painting.

D

Front impact sensor, SRS-ECU, Air bag module, clock spring, side impact sensor: 93

_

C

or more

D

Seat belt with pre-tensioner: 90

_

C or more

Recheck SRS system operability after re-installing them.

2.

If the SRS components and seat belts with pre-tensioner are removed for the purpose of check,
sheet metal repair, painting, etc., they should be stored in a clean, dry place until they are
reinstalled.

Side air bag module
deployment section

Quarter
panel,
inner

Side
impact
sensor