Mitsubishi Galant 9G. Manual - part 1488

FRONT IMPACT SENSORS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-362

FRONT IMPACT SENSORS

REMOVAL AND INSTALLATION

M1524001500300

WARNING

•

Never repair or disassemble the front impact sensor. If faulty, replace it. 

•

Handle the front impact sensors very carefully, taking care not to drop them. They must 
be replaced if they are dropped.

•

Replace the sensors with new ones after the air bag has deployed.

NOTE: The figure indicates the right front impact 
sensor. The left impact sensor is symmetrical to this.

Pre-removal Operation

• Turn the ignition key to the "LOCK" (OFF) position. 

AC307984

AB

1

7.5 ± 2.5 N·m 
67 ± 22 in-lb

2

RADIATOR SUPPORT PANEL

REMOVAL STEPS

<<A>>

1.

NEGATIVE (-) BATTERY CABLE 
CONNECTION

•

AIR DUCT (REFER TO GROUP 
15, AIR CLEANER )

2.

FRONT IMPACT SENSOR

INSTALLATION STEPS

>>A<<

•

PRE-INSTALLATION 
INSPECTION

>>B<<

2.

FRONT IMPACT SENSOR

•

AIR DUCT (REFER TO GROUP 
15, AIR CLEANER )

1.

NEGATIVE (-) BATTERY CABLE 
CONNECTION

>>C<<

•

POST-INSTALLATION 
INSPECTION

FRONT IMPACT SENSORS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-363

REMOVAL SERVICE POINT

.

<<A>>NEGATIVE (-) BATTERY CABLE DISCON-
NECTION

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 air 
bag(s) deployment.

INSTALLATION SERVICE POINTS

.

>>A<<PRE-INSTALLATION INSPECTION

when installing the new front impact sensor, refer to "INSPEC-
TION."

.

>>B<<FRONT IMPACT SENSOR INSTALLATION

WARNING

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

1. Securely connect the connector.

2. Position the front impact sensor facing toward the front of 

the vehicle as indicated by the arrow on the label, and install 
it securely.

.

ACX00583

INSULATING TAPE

BATTERY

BATTERY CABLE (–)

AC

FRONT IMPACT SENSORS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-364

>>C<<POST-INSTALLATION INSPECTION

1. Reconnect the negative (-) battery cable.

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

seven seconds, and go out?

4. If yes, the SRS system is functioning properly.

If not, consult page 

P.52B-31

.

INSPECTION

M1524001600277

WARNING

If a dent, crack, deformation or rust is detected, 
replace with a new sensor.

NOTE: For checking of the front impact sensor other than 
described below, refer to the section concerning SRS diagnosis 
(Refer to 

P.52B-33

).

1. Check the front impact sensor and bracket for dents, cracks 

or deformation.

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

mation.

3. Check that there is no bending or corrosion in the radiator 

support pannel.

AC307341

SRS WARNING LIGHT

AB

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