Mitsubishi Evolution X. Manual - part 644

GENERAL INFORMATION

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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-23

SEAT BELT 
SWITCH 
PASSENGER'S 
SIDE

CENTER 
PANEL 
UNIT

ETACS-ECU

(FUSE     )

12

INTERFACE
CIRCUIT

SRS-ECU

AIR BAG OFF 
INDICATOR 
LIGHT 
PASSENGER'S 
SIDE

HALL IC

SEAT BELT WARNING 
TOME ALARM

GENERAL INFORMATION

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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-24

COMPONENT LOCATION

NOTE: The illustration above shows the front impact sensor (LH) and the side impact sensor (LH). The posi-
tion of the front impact sensor (RH) and the side impact sensor (RH) is symmetrical to this.

AC605324

AC605641

AC605684

AC708928

AC608583

AB

Driver's air bag module

Clock spring

Passenger's (front) air bag module

Data link connector

SRS-ECU

Side impact sensor

Front impact sensor

Side-airbag module

Seat belt 
pre-tensioner

Occupant 
classification-
ECU

Seat slide 
sensor

Weight 
sensor

Knee air bag module

Weight 
sensor

SERVICE PRECAUTIONS

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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-25

SERVICE PRECAUTIONS

M1524000301339

DANGER

•

In order to avoid injury to yourself or others from 
accidental deployment of the air bag during servic-
ing, read and carefully follow all the precautions 
and procedures described in this manual.

•

After disconnecting the battery cable, wait 60 sec-
onds or more before proceeding with the following 
work. The SRS system is designed to retain 
enough voltage to deploy the air bag for a short 
time even after the battery has been disconnected, 
so serious injury may result from unintended air 
bag deployment if work is done on the SRS system 
immediately after the battery cables are discon-
nected.

WARNING

•

Battery posts, terminals and related accessories 
contain lead and lead compounds. WASH HANDS 
AFTER HANDLING.

•

Do not use any electrical test equipment on or near 
the SRS components, except those specified on 

P.52B-370

.

•

Never Attempt to Repair the Following Compo-
nents: SRS-ECU, Clock Spring, Air Bag Modules, 
Front impact sensor, Side Impact Sensor, Seat Belt 
with Pre-tensioner. If any of these components are 
diagnosed as faulty, they should only be replaced, 
in accordance with the INDIVIDUAL COMPONENT 
SERVICE procedures in this manual, starting on 

P.52B-377

.

•

Do not attempt to repair the wiring harness con-
nectors of the SRS. If any of the connectors are 
diagnosed as faulty, replace the wiring harness. If 
the wires are diagnosed as faulty, replace or repair 
the wiring harness according to the following 
table.

.

ACX00583

Insulating tape

Battery cable

Battery

AF

AC506921

SRS-ECU connector

AC

SERVICE PRECAUTIONS

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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-26

SRS-ECU terminal No.

Destination of harness

Corrective action

1, 2

Instrument panel wiring harness 

→ Knee 

air bag module

Correct or replace the instrument panel 
wiring harness.

5, 6

Instrument panel wiring harness 

→ 

Clock spring 

→ Driver's air bag module 

1st squib side

Correct or replace the instrument panel 
wiring harness. Replace the clock 
spring.

7, 8

Instrument panel wiring harness 

→ 

Passenger's (front) air bag module 1st 
squib side

Correct or replace the instrument panel 
wiring harness.

9, 10

Instrument panel wiring harness 

→ 

Clock spring 

→ Driver's air bag module 

2nd squib side

Correct or replace the instrument panel 
wiring harness. Replace the clock 
spring.

11, 12

Instrument panel wiring harness 

→ 

Passenger’s (front) air bag module 2nd 
squib side

Correct or replace the instrument panel 
wiring harness.

15, 16

CAN line

Correct or replace CAN line.

17

Instrument panel wiring harness 

→ 

Ground

Correct or replace the instrument panel 
wiring harness.

18

 Instrument panel wiring harness 

→ Air 

bag OFF indicator light

Correct or replace the instrument panel 
wiring harness.

21, 22

Front wiring harness 

→ Instrument panel 

wiring harness 

→ Front impact sensor 

wiring harness 

→ Front impact sensor 

(LH)

Correct or replace each wiring harness.

23, 24

Front wiring harness 

→ Instrument panel 

wiring harness 

→ Front impact sensor 

wiring harness 

→ Front impact sensor 

(RH)

Correct or replace each wiring harness.

31, 32

Floor wiring harness 

→ Side-air bag 

module (LH)

Correct or replace the floor wiring 
harness.

33, 34

Floor wiring harness 

→ Side-air bag 

module (RH)

Correct or replace the floor wiring 
harness.

39, 40

Floor wiring harness 

→ Rear floor wiring 

harness (RH) 

→ Curtain air bag module 

(RH)

Correct or replace each wiring harness.

41, 42

Floor wiring harness 

→ Rear floor wiring 

harness (LH) 

→ Curtain air bag module 

(LH)

Correct or replace each wiring harness.

43, 44

Floor wiring harness 

→ Seat belt 

pre-tensioner (RH)

Correct or replace the floor wiring 
harness.

45, 46

Floor wiring harness 

→ Seat belt 

pre-tensioner (LH)

Correct or replace the floor wiring 
harness.

49, 50

Floor wiring harness 

→ Side impact 

sensor (LH)

Correct or replace the floor wiring 
harness.

51, 52

Floor wiring harness 

→ Side impact 

sensor (RH)

Correct or replace the floor wiring 
harness.