Mitsubishi Grandis. Manual — part 1042

FRONT IMPACT SENSORS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-220

NOTE:

*

: indicate RHD vehicles. For LHD vehicles,

the specified application position of label is reversed
left to right.

FRONT IMPACT SENSORS

REMOVAL AND INSTALLATION

M1524001500418

WARNING

•

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

•

Do not drop or subject the front impact sensor to impact or vibration. If denting, cracking,
deformation, or rust are discovered in the front impact sensor, replace it with a new front
impact sensor. Discard the old one.

•

After deployment of an air bag, replace the front impact sensor with a new one.

AC302535

AC311616

AC311372

AC312006

AC312011

AC

Side impact sensor (front)

Side impact sensor (rear)

Curtain air bag module

Passenger's air bag
cut off switch

FRONT IMPACT SENSORS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-221

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

REMOVAL SERVICE POINT
<<A>>NEGATIVE BATTERY CABLE
DISCONNECTION

DANGER

Wait at least 60 seconds after disconnecting
the battery cable before doing any further
work (Refer to

P.52B-7

).

WARNING

Battery posts, terminals and related
accessories contain 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.

AC311399

AC311903

AC312505

1

10 ± 2 N·m

Radiator support panel

2

AB

Removal step

<<A>>

1.

Negative battery cable connection

•

Battery

2.

Front impact sensor
Installation steps

>>A<<

•

Pre-installation inspection

>>B<<

2.

Front impact sensor

•

Battery

1.

Negative battery cable connection

>>C<<

•

Post-installation inspection

ACX00583

Insulating tape

Battery

Battery cable (–)

AC

FRONT IMPACT SENSORS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-222

INSTALLATION SERVICE POINTS
>>A<<PRE-INSTALLATION INSPECTION

When installing the new front impact sensor, refer to
"INSPECTION."

>>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.

>>C<<POST-INSTALLATION INSPECTION

1. Reconnect the negative battery cable.
2. Turn the ignition key to "ON" position.

3. Does the SRS warning lamp illuminate for about 7

seconds, and go out?

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

If not, consult page

P.52B-13

.

INSPECTION

M1524001600385

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-13

).

1. Check the front impact sensor and bracket for

dents, cracks or deformation.

2. Check the connector for damage, and terminals

for deformation.

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

radiator support panel.

AC312486

SRS warning lamp

AB

SRS CONTROL UNIT (SRS-ECU)

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-223

SRS CONTROL UNIT (SRS-ECU)

REMOVAL AND INSTALLATION

M1524002100509

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,
deformation, or rust are discovered in the SRS-ECU, replace it with a new front impact
sensor. Discard the old one.

•

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 on

P.52B-12

.

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

AC312522

AC312154

AC311439

7.5 ± 2.5 N·m

1

2

AB

Removal steps

<<A>>

1.

Negative battery cable connection

•

Centre console (Refer to GROUP
52A, Instrument panel assembly

P.52A-2

.)

•

Rear heater duct (Refer to GROUP
55, Ventilators

P.55-229

.)

Removal steps (Continued)