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Mitsubishi Grandis. Manual - part 1040

SRS MAINTENANCE

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-212

FRONT WIRING HARNESS/INSTRUMENT PANEL WIRING HARNESS/FLOOR WIRING
HARNESS/REAR FLOOR WIRING HARNESS

AC312782

AC309797

AC310245

AC309925

AC309785

AC310236

Air bag module connector
<passenger's side>

SRS-ECU connector

Air bag module
connector
<driver's side>

Clock spring connector

Side impact sensor
connector (RH)

Seat belt pre-tensioner
connector (RH)

Curtain air bag module
connector (LH)

Curtain air bag module
connector (RH)

Passenger's air bag
off indicator lamp
connector

Side-airbag module
connector (LH)

Seat slide
sensor connector

<LH drive vehicles>

Passenger's air bag
cut off switch connector

Side impact sensor
connector (Rear) (RH)

Front impact sensor
connector (RH)

Front impact sensor
connector (LH)

Side-airbag module
connector (RH)

Side impact sensor
connector (Rear) (LH)

Side impact sensor
connector (LH)

Seat belt pre-tensioner
connector (LH)

SRS MAINTENANCE

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-213

1. Check connector for poor connection.

2. Check harnesses for binds, connectors for

damage, and terminals for deformation. Replace
any connectors or harness that fail the visual
inspection (Refer to

P.52B-5

AC312824

AC310239

AC309788

AC310248

AC309928

AC309797

Air bag module connector
<passenger's side>

SRS-ECU connector

Air bag module
connector
<driver's side>

Clock spring connector

Side impact sensor
connector (RH)

Seat belt pre-tensioner
connector (RH)

Curtain air bag module
connector (LH)

Curtain air bag module
connector (RH)

Passenger's air bag
off indicator lamp
connector

Side-airbag module
connector (LH)

Seat slide
sensor connector

<RH drive vehicles>

Passenger's air bag
cut off switch connector

Side impact sensor
connector (Rear) (RH)

Front impact sensor
connector (RH)

Front impact sensor
connector (LH)

Side-airbag module
connector (RH)

Side impact sensor
connector (Rear) (LH)

Side impact sensor
connector (LH)

Seat belt pre-tensioner
connector (LH)

POST-COLLISION DIAGNOSIS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-214

STEERING WHEEL AND STEERING
COLUMN SHAFT ASSEMBLY

1. Check the fit of the driver's air bag module to the

steering wheel.

2. Check the steering wheel for noise, binds or

difficult operation and excessive free play.

3. Check the steering column shaft shock absorbing

mechanism (Refer to GROUP 37, On-Vehicle
Service

P.37-13

POST-INSTALLATION INSPECTION

Reconnect the negative battery terminal. Turn the
ignition key to the "ON" position. Does the SRS
warning lamp illuminate for about 7 seconds, turn off
and then remain extinguished for at least 5 seconds?
If yes, SRS system is functioning properly. If no,
consult page

P.52B-13

POST-COLLISION DIAGNOSIS

M1524001100700

Whether or not the air bags have deployed, check
and service the vehicle after collision as follows:

SRS-ECU MEMORY CHECK

CAUTION

Refer to that the ignition switch is "LOCK" (OFF)
when connecting or disconnecting MUT-III.
1. Connect the MUT-III to the diagnosis connector

(Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

P.00-5

AC312486

SRS warning lamp

AC302297

AC310120

MB991827

16-pin

MB991910

MB991824

POST-COLLISION DIAGNOSIS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-215

2. Read (and write down) all displayed diagnosis

codes (Refer to

P.52B-13

NOTE: If battery power supply has been shut
down by the collision, the MUT-III cannot
communicate with the SRS-ECU. Check and,
repair if necessary, the instrument panel wiring
harness before the next job.

3. Use the MUT-III to read the data list (how long

trouble(s) have continued and how often memory
have been erased).

Data list

4. Erase the diagnosis codes and after waiting 5

seconds or more read (and write down) all
displayed diagnosis codes.

REPAIR PROCEDURE
WHEN FRONT AIR BAGS DEPLOY IN A
COLLISION.

1. Replace the following parts with new ones.

• SRS-ECU (Refer to

P.52B-223

• Front air bag modules (Refer to

P.52B-225

• Seat belt with pre-tensioner (Refer to

P.52B-239

• Front impact sensors (Refer to

P.52B-220

• Instrument panel (Refer to GROUP 52A,

Instrument Panel Assembly

P.52A-2

• Passenger’s air bag cut off switch (Refer to

P.52B-244

2. Check the following parts and replace if there are

any malfunctions.

• Clock spring (Refer to

P.52B-225

• Steering wheel, steering column and shaft

assembly (Refer to GROUP 37, Steering wheel

P.37-14

, Steering column and shaft assembly

P.37-16

(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.

(4) Check the steering column shaft shock

absorbing mechanism (Refer to GROUP 37,
On-Vehicle Service

P.37-13

3. Check the harness for binding, connectors for

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

P.52B-5

WHEN SIDE AIR BAGS DEPLOY IN A
COLLISION.

1. Replace the following parts with new ones.

• SRS-ECU (Refer to

P.52B-223

• Side impact sensors (Refer to

P.52B-236

• Curtain air bag modules (Refer to

P.52B-231

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

Front Seat Assembly

P.52A-24

2. Check the harness for binding, connectors for

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

P.52B-5

WHEN AIR BAGS DO NOT DEPLOY IN
LOW-SPEED COLLISION.

Check the SRS components. If visible damage such
as dents, cracks, or deformation is found on the SRS
components, replace them with new ones.
Concerning parts removed for inspection,
replacement with new parts and cautions in working,
refer to

P.52B-218

FRONT IMPACT SENSOR

1. Check the front side member and front impact

sensor for deformation or rust.

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

deformation or rust.

Service Data Item

Applicability

Failure continuation time 1

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

Failure continuation time 2

Elimination times

Maximum time to be stored: 255

AC311405

Radiator support panel

Front impact sensor (LH)

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