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
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
REPAIR PROCEDURE
WHEN FRONT AIR BAGS DEPLOY IN A COLLISION.
1. Replace the following parts with new ones.
•
SRS-ECU (Refer to
•
Air bag module (Refer to
2. Check the following parts and replace if there are any
malfunctions.
•
Clock spring (Refer to
•
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
WHEN SIDE AIR BAG DEPLOY IN A COLLISION.
1. Replace the following parts with new ones.
•
SRS-ECU (Refer to
•
.)
•
Front seat back assembly (Refer to GROUP 52A, Front
Seat
2. Check the wiring harnesses for binding, the connectors for
damage, poor connections, and the terminals for
deformation. (Refer to
NO.
SERVICE DATA ITEM
APPLICABILITY
92
Number indicating how often the memory is
cleared
Maximum time to be stored: 250
93
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)
94
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,
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
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
AC002988AB
AIR BAG MODULE
DEPLOYMENT
SECTION
AC000390AB
CASE
PROTECTIVE TUBE
AC003215AB
FRONT OF
VEHICLE
SIDE IMPACT
SENSOR
CENTER
PILLAR
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