Mitsubishi Galant (2004+). Manual - part 1614

POST-COLLISION DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-349

REPAIR PROCEDURE

.

WHEN FRONT AIR BAGS DEPLOY IN A COLLISION.
1. Replace the following parts with new ones:

• SRS-ECU (Refer to 

P.52B-365

).

• Air bag modules (Refer to 

P.52B-368

).

• Seat belt with pre-tensioner (Refer to 

P.52B-380

).

• Front seat asembly <Passenger’s side> (Refer to GROUP 

52A, Front Seat Assembly 

P.52A-21

).

• Front impact sensors (Refer to 

P.52B-362

).

• Instrument panel (Refer to GROUP 52A, Instrument Panel 

Assembly 

P.52A-3

).

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

malfunctions:

• Clock spring (Refer to 

P.52B-368

).

• Seat slide sensor (Refer to 

P.52B-384

).

• Seat belt switch (Refer to GROUP 52A, Front Seat Assem-

bly 

P.52A-21

).

• Steering wheel, steering column shaft assembly

(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 and alignment with 

the steering wheel.

(3) Check the steering wheel for noise, binding 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-25

).

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

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

P.52B-26

).

.

WHEN SIDE AIR BAGS DEPLOY IN A COLLISION.
1. Replace the following parts with new ones:

• SRS-ECU (Refer to 

P.52B-365

).

• Side impact sensors (Refer to 

P.52B-377

).

• Front seat assembly (Refer to GROUP 52A, Front Seat 

Assembly 

P.52A-26

).

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

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

P.52B-26

).

.

WHEN AIR BAGS DO 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 appropriate INDIVIDUAL COMPONENT 
SERVICE 

P.52B-353

.

.

POST-COLLISION DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-350

Front impact sensor
1. Check the radiator support panel for distortion and rust.
2. Check the front impact sensor for dents, cracks, deformation 

or rust.

3. Check the front impact sensor wiring harness for binding, 

check the connector for damage, and check the terminals 
for deformation.

.

SRS-ECU
1. Check the SRS-ECU case for dents, cracks or deformation.
2. Check the connector for damage, and the terminals for 

deformation.

3. Check the installation of the SRS-ECU.

.

AC306331AB

FRONT IMPACT
SENSOR

HEADLIGHT (RH)

RADIATOR SUPPORT
PANEL

AC308239

SRS-ECU

AB

CENTER
REINFORCEMENT

POST-COLLISION DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-351

Air bag modules
1. Check the pad cover for dents, cracks or deformation.
2. Check the connector for damage, terminal 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  installation or alignment with the steering 
wheel.

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

instrument panel and front deck crossmember to check  
installation or alignment.

.

Front seatback assembly (Side-airbag module)
1. Check the air bag module deployment section for dents or 

deformation.

2. Check that there is no connector damage, bent terminals or  

harness crimping.

.

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

damage, and the terminals for deformation.

2. Visually check the case for damage.

.

AC307662AB

<DRIVER'S SIDE>

<FRONT PASSENGER'S SIDE>

INFLATOR CASE

CONNECTOR

CONNECTOR

INFLATOR 
CASE

AC206854

AIR BAG MODULE
DEPLOYMENT
SECTION

AB

AC306766AB

CASE

PROTECTIVE TUBE

POST-COLLISION DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-352

Side impact sensor
1. Check that there is no bending or corrosion in the center 

pillar.

2. Check that there is no denting, breakage or bending of the 

side impact sensor.

3. Check that there is no harness crimping, connector damage 

or bent terminals.
NOTE:  The illustration shows the side impact sensor (RH). 
The position of the side impact sensor (LH) is symmetrical to 
this.

.

Seat slide sensor
1. Check that there is no connector damage, bent terminals or  

harness crimping.

2. Check the installation of the seat slide sensor.

.

Occupant classification sensor
1. Check the occupant classification-ECU case and occupant 

classification sensor for dents, cracks or deformation.

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

deformation.

3. Check the installation of the occupant classification-ECU 

and occupant classification sensor.

.

Steering wheel, steering column and shaft assembly
1. Check the wiring harness (built into the steering wheel) and 

the connectors for damage, and the terminals for 
deformation.

AC206185 AC

FRONT SEAT BELT
RETRACTOR

SIDE
IMPACT
SENSOR

AC307451

AB

SEAT SLIDE 
SENSOR

AC305748 AC

OCCUPANT 
CLASSIFICATION-ECU

OCCUPANT
CLASSIFICATION
SENSOR