Mitsubishi Galant (2004+). Manual - part 1618

SRS CONTROL UNIT (SRS-ECU)

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-365

SRS CONTROL UNIT (SRS-ECU)

M1524002100413

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 here 

P.52B-347

.

•

When removing and installing the front passenger seat, be sure to carry out accuracy 
check occupant classification sensor after the seat has been installed in the vehicle. 
(On-Vehicle Service 

P.52B-354

.)

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

AC307664

7.5 ± 2.5 N·m
67 ± 22 in-lb

2

1

SRS CONTROL UNIT (SRS-ECU)

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-366

REMOVAL SERVICE POINTS

.

<<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-26

).

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 deployment.

.

<<B>> SRS-ECU REMOVAL
Remove the SRS-ECU with 9.5 (3/8inch) sq. slide head handle 
and 9.5 sq. (3/8inch) socket wrench.

REMOVAL STEPS

<<A>>

1.

NEGATIVE (

−) BATTERY CABLE 

CONNECTION

•

FLOOR CONSOLE ASSEMBLY 
(REFER TO GROUP 52A, FLOOR 
CONSOLE ASSEMBLY 

P.52A-9

)

•

FRONT SEAT ASSEMBLY 
(REFER TO GROUP 52A, FRONT 
SEAT ASSEMBLY 

P.52A-21

)

•

FRONT SCUFF PLATE, COWL 
SIDE TRIM (REFER TO GROUP 
52A,  TRIMS 

P.52A-10

)

•

FLOOR CARPET

•

REAR HEATER DUCT A, B 
(REFER TO GROUP 55A,  DUCTS 

P.55A-291

)

<<B>>

2.

SRS-ECU

3.

SRS-ECU BRACKET

INSTALLATION STEPS

3.

SRS-ECU BRACKET

>>A<<

2.

SRS-ECU

•

REAR HEATER DUCT A, B 
(REFER TO GROUP 55A,  DUCTS 

P.55A-291

)

•

FLOOR CARPET

•

FRONT SCUFF PLATE, COWL 
SIDE TRIM (REFER TO GROUP 
52A,  TRIMS 

P.52A-10

)

•

FRONT SEAT ASSEMBLY 
(REFER TO GROUP 52A, FRONT 
SEAT ASSEMBLY 

P.52A-21

)

•

FLOOR CONSOLE ASSEMBLY 
(REFER TO GROUP 52A, FLOOR 
CONSOLE ASSEMBLY 

P.52A-9

)

1.

NEGATIVE (

−) BATTERY CABLE 

CONNECTION

>>B<<

•

POST-INSTALLATION 
INSPECTION

ACX00583

INSULATING TAPE

BATTERY

BATTERY CABLE (–)

AC

SRS CONTROL UNIT (SRS-ECU)

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-367

INSTALLATION SERVICE POINTS

.

>>A<< SRS-ECU INSTALLATION

WARNING

The SRS may not activate if the SRS-ECU is not 
installed properly, which could result in serious injury 
or death to the vehicle's driver or front passenger.

Install the SRS-ECU with 9.5 sq. (3/8inch) slide head handle 
and 9.5 sq. (3/8inch) socket wrench.

.

>>B<< POST-INSTALLATION INSPECTION
1. Reconnect the negative (

−) battery cable.

2. Turn the ignition switch to the "ON" position.
3. Does the "SRS" warning light illuminate for approximately 

seven seconds, and then go out?

4. If yes, the SRS system is functioning properly. If not, refer to 

P.52B-32

.

INSPECTION

M1524002200357

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-333

 for inspection of SRS-ECU for other 

than physical damage. 

AC307341

SRS WARNING LIGHT

AB

AIR BAG MODULES AND CLOCK SPRING

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-368

AIR BAG MODULES AND CLOCK SPRING

M1524002400481

REMOVAL AND INSTALLATION

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 with the pad cover 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 clock spring with a new one.

•

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-388

).

•

When removing and installing the front passenger seat, be sure to carry out accuracy 
check occupant classification sensor after the seat has been installed in the vehicle. 
(On-Vehicle Service 

P.52B-354

.)

<Side-airbag module>

For removal and installation of the front seatback assembly with side-airbag module, refer to GROUP 52A, 
Front Seat 

P.52A-26

.