Mitsubishi L200. Manual — part 648

FRONT IMPACT SENSORS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-263

FRONT IMPACT SENSORS

REMOVAL AND INSTALLATION

M1524001501596

WARNING

•

Disconnect the negative battery terminal and wait for 60 seconds or more before starting
work. Furthermore, the disconnected battery terminal should be covered with tape to
insulate it.

•

Never attempt to disassemble or repair 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.

•

Never use an ohmmeter on or near the front impact sensor, and use only the special test
equipment described on

P.52B-11

.

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

• Disconnect the Negative Battery Terminal.

AC502126

5.0 ± 1.0 N·m

Headlamp support panel

1, 2

Front

AC

Removal step

<<

A

>>

1.

Front impact sensor (RH)

<<

B

>>

2.

Front impact sensor (LH)
Installation steps

>>

A

<<

•

Pre-installation inspection

>>

B

<<

2.

Front impact sensor (LH)

>>

B

<<

1.

Front impact sensor (RH)

•

Negative battery cable connection

>>

C

<<

•

Post-installation inspection

NOTE: The figures show front impact sensor (RH).

REMOVAL SERVICE POINTS

<<A>> FRONT IMPACT SENSOR (RH)
1. An air duct is removed (Refer to GROUP15, Air

cleaner ).

2. Slide the A/C condenser outlet pipe to remove the

front impact sensor (RH).

<<B>> FRONT IMPACT SENSOR (LH)
Disconnect the power steering oil reservoir and
remove the front impact sensor (LH).

INSTALLATION SERVICE POINTS

>>A<< PRE-INSTALLATION INSPECTION
When the new front impact sensor, refer to "INSPEC-
TION

P.52B-264

."

FRONT IMPACT SENSORS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-264

>>B<< FRONT IMPACT SENSOR INSTALLATION

WARNING

The SRS may not activate properly if a front
impact sensor is not installed properly.

1. Securely connect the connector.
2. Install the front impact sensor with the arrow on

the label pointing toward the front of the vehicle
and with the labelled surface facing outside the
vehicle.

>>C<< POST-INSTALLATION INSPECTION
1. Connect the negative battery cable.
2. Turn the ignition switch to "ON" position.

AC900540 AB

SRS warning lamp

3. Does the "SRS" warning lamp illuminate for

approximately seven seconds, and go out?

4. If no, refer to troubleshooting (Refer to

P.52B-12

).

INSPECTION

M1524001600965

WARNING

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

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

deformation or rust.

2. Check the connector for damage, and terminals

for deformation.

3. Check the headlamp support panel for

deformation.

WARNING

Always replace the sensor with a new one if
the resistance shows a short or open circuit.

CAUTION

Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.

AC501402

C-13 Intermediate connector (rear view)

BG

<LHD>

AC501402

C-13 Intermediate connector (rear view)

BN

<RHD>

4. Measure the resistance of front impact sensor at

the intermediate connector (the front impact
sensor is connected).
(1) Disconnect intermediate connector C-13.
(2) The resistance between the terminal 3 and 10,

or between the terminal 4 and 5 on the
backside of intermediate connector (male
side) <LHD>

(3) The resistance between the terminal 5 and 6,

or between the terminal 16 and 17 on the
backside of intermediate connector (male
side) <RHD>

NOTE: Prior to that check, confirm the wiring
harness between the front impact sensor and
intermediate connector, and repair if neces-
sary.

Standard value: 820

± 82 Ω

AC501402

C-13 Intermediate connector (rear view)

BI

<LHD>

AC501402BO

C-13 Intermediate connector (rear view)

<RHD>

FRONT IMPACT SENSORS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-265

5. Measure the resistance of front impact sensor at

the intermediate connector (the front impact
sensor is connected).
(1) Disconnect intermediate connector C-13.
(2) Continuity between the terminal 3, 4, 5 and 10

on the backside of intermediate connector
(male side) and body earth <LHD>

(3) Continuity between the terminal 5, 6, 16 and

17 on the backside of intermediate connector
(male side) and body earth <RHD>

NOTE: Prior to that check, confirm the wiring
harness between the front impact sensor and
intermediate connector, and repair if neces-
sary.

OK: Open circuit

AC312926AW

C-13 Intermediate connector (rear view)

<LHD>

AC312926AV

C-13 Intermediate connector
(rear view)

<RHD>

6. Measure the voltage of front impact sensor at the

intermediate connector (the front impact sensor is
connected).
(1) Disconnect intermediate connector C-13.
(2) Connect the negative battery cable.
(3) Turn the ignition switch to "ON" position.
(4) Voltage between the terminal 3, 4, 5 and 10 on

the backside of intermediate connector (male
side) and body earth <LHD>

(5) Voltage between the terminal 5, 6, 16 and 17

on the backside of intermediate connector
(male side) and body earth <RHD>

NOTE: Prior to that check, confirm the wiring
harness between the front impact sensor and
intermediate connector, and repair if neces-
sary.

OK: 1 V or less

7. Check the headlamp support pane for

deformation and rust.

SRS CONTROL UNIT (SRS-ECU)

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-266

SRS CONTROL UNIT (SRS-ECU)

REMOVAL AND INSTALLATION

M1524002101591

WARNING

•

Disconnect the negative battery terminal and wait for 60 seconds or more before starting
work. Furthermore, the disconnected battery terminal should be covered with tape to
insulate it.

•

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. 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-11

.

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

• Disconnect the Negative Battery Terminal.

AC701017

9.0 ± 2.0 N·m

2

1

5.0 ± 1.0 N·m

4

AC

<Vehicles without side-airbag and curtain air bag>