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Mitsubishi Galant. Manual - part 605

TEST EQUIPMENT

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SUPPLEMENTAL RESTRAINT SYSTEM(SRS)

52B-61

TEST EQUIPM ENT

M1524000800085

SR S M A IN TEN A N C E

M1524003900081

The SRS must be inspected by an authorized dealer up to 10
years after the date of vehicle registration. (Refer to GROUP
00, Maintenance Service

−

SRS Maintenance.)

PO ST-C O LLISIO N D IA G N O SIS

M1524001100089

To inspect and service the SRS after a collision (whether or not
the air bags have deployed), perform the following steps.

SRS-ECU MEMORY CHECK

Required Special Tool:

•

MB991502: Scan tool (MUT-II)

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
1. Connect scan tool MB991502 to the data link connector (16-

pin).

NOTE: If the battery power supply has been disconnected or
disrupted by the collision, scan tool MB991502 cannot
communicate with the SRS-ECU. Check the battery then
check and, if necessary, repair the front wiring harness and
the body wiring harness before proceeding.

2. Read (and write down) all displayed DTC. (Refer to

P.52B-

3. Read the data list (fault duration and how many times

memories are erased) using scan tool MB991502.

TOOL

NAME

USE

Digital multi-meter Use a multi-meter for
which the maximum test current is 2 mA or
less at the minimum range of resistance
measurement

Checking the SRS electrical circuitry with
SRS check harness

AC000019AB

AC003194AB

16 PIN

MB991502

POST-COLLISION DIAGNOSIS

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SUPPLEMENTAL RESTRAINT SYSTEM(SRS)

52B-62

Data list

4. Erase the DTC and, after waiting 5 seconds or more, read

(and write down) all displayed DTC. (Refer to

P.52B-18

REPAIR PROCEDURE

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

•

SRS-ECU (Refer to

P.52B-65

•

Air bag module (Refer to

P.52B-67

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

malfunctions.

•

Clock spring (Refer to

P.52B-67

•

Steering wheel, steering column and intermediate joint

(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 or alignment with

the steering wheel.

(3)Check the steering wheel for noise, binds or difficult

operation and excessive free play.

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

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

P.52B-15

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

•

SRS-ECU (Refer to

P.52B-65

•

Side impact sensors (Refer to

P.52B-74

•

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

P.52A-16

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

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

P.52B-15

NO.

SERVICE DATA ITEM

APPLICABILITY

Number indicating how often the memory is
cleared

Maximum time to be stored: 250

How long a problem has lasted (How long it
takes from the occurrence of the problem till
the first air bag squib igniting signal)

Maximum time to be stored: 9,999 minutes
(approximately 7 days)

How long a problem has lasted (How long it
takes from the first air bag squib igniting
signal till now.)

POST-COLLISION DIAGNOSIS

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SUPPLEMENTAL RESTRAINT SYSTEM(SRS)

52B-63

WHEN AIR BAG DOES NOT DEPLOY IN LOW-SPEED
COLLISION.
Check the SRS components. If the SRS components are
showing 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-65

SRS-ECU
1. Check the SRS-ECU case and brackets for dents, cracks or

deformation.

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

deformation.

Air bag modules
1. Check the pad cover for dents, cracks or deformation.

2. Check the connector for damage, terminals 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 fit or alignment with the steering wheel.

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

instrument panel and crossmember to check fit or alignment.

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

the instrument panel to check fit or alignment.

AC003132AB

SRS-ECU

AC003214AB

<DRIVER'S SIDE>

<FRONT PASSENGER'S SIDE>

CONNECTOR

INFLATOR CASE

COVER

INFLATOR CASE

POST-COLLISION DIAGNOSIS

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SUPPLEMENTAL RESTRAINT SYSTEM(SRS)

52B-64

Front seatback assembly (Side air bag module)
1. Check that there is no abnormality in the seat air bag

module deployment section.

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

clamping of the harness.

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.

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 clamping of the harness, connector

damage or bent terminals.

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

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

the connectors for damage, and the terminals for
deformation.

2. Install the air bag module to check fit or alignment with the

steering wheel.

3. Check the steering wheel for noise, binding or difficult

operation and excessive free play.

Harness connector (floor wiring harness)
Check the harnesses for binding, the connectors for damage,
poor connection, and the terminals for deformation. (Refer to

P.52B-15

AC002988AB

AIR BAG MODULE
DEPLOYMENT
SECTION

AC000390AB

CASE

PROTECTIVE TUBE

AC003215AB

FRONT OF
VEHICLE

SIDE IMPACT
SENSOR

CENTER
PILLAR

Content .. 603 604 605 606 ..