Mitsubishi L200. Manual - part 584

SERVICE PRECAUTIONS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-7

<Vehicle with side-airbag and curtain air bag>

SRS-ECU terminal No.

Destination of harness

Remedy

1, 2

Floor wiring harness 

→ Instrument 

panel wiring harness 

→ roof wiring 

harness 

→ curtain air bag module (LH)

Correct or replace each wiring harness.

3, 4

Floor wiring harness 

→ side-airbag 

module (LH) 

Correct or replace the floor wiring 
harness.

5, 6

Floor wiring harness 

→ Seat belt pre-

tensioner (passenger’s side)

15, 16

Floor wiring harness 

→ side impact 

sensor (LH) 

21, 22

Instrument panel wiring harness 

→ 

Passenger's air bag cut off switch 

→ 

Passenger's (front) air bag module

Correct or replace the instrument panel 
wiring harness.

27, 28

Instrument panel wiring harness 

→ 

Clock spring 

→ Driver's air bag module

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

29, 30

Instrument panel wiring harness 

→ 

Front wiring harness 

→ Front impact 

sensor (LH)

Correct or replace each wiring harness.

35, 36

Instrument panel wiring harness 

→ 

Front wiring harness 

→ Front impact 

sensor (RH)

37

Instrument panel wiring harness 

→ 

Junction block (fuse No.15)

Correct or replace the instrument panel 
wiring harness.

38

Instrument panel wiring harness 

→ 

Diagnosis connector

39

Instrument panel wiring harness 

→ 

SRS warning lamp

41

Instrument panel wiring harness 

→ 

Earth

43

Instrument panel wiring harness 

→ 

Junction block (fuse No.21)

51, 52

Floor wiring harness 

→ Seat belt pre-

tensioner (driver’s side)

Correct or replace the floor wiring 
harness.

53, 54

Floor wiring harness 

→ side-airbag 

module (RH) 

55, 56

Floor wiring harness 

→ Instrument 

panel wiring harness 

→ roof wiring 

harness 

→ curtain air bag module (RH)

Correct or replace each wiring harness.

61, 62

Floor wiring harness 

→ side impact 

sensor (RH) 

Correct or replace the floor wiring 
harness.

AC300580AB

Insulating tape

Battery

Battery cable

SERVICE PRECAUTIONS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-8

DANGER

After disconnecting the battery cable, wait 60 
seconds or more before proceeding with the 
following work. In addition, insulate the neg-
ative battery terminal with a tape. The con-
denser inside the SRS-ECU is designed to 

retain enough voltage to deploy the air bag 

SERVICE PRECAUTIONS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-9

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 disconnected.

CAUTION

The SRS components and seat belt with pre-ten-
sioner should not be subjected to heat, so 
remove the SRS-ECU, driver’s and passenger’s 
(front) air bag modules, clock spring, front 
impact sensor, curtain air bag module, seat belt 
with pre-tensioner before drying or baking the 
vehicle after painting.

• SRS-ECU, air bag modules, clock spring and 

impact sensors: 93

° C or more

• Seat belt with pre-tensioner: 90°C or more

CAUTION

Whenever you finish servicing the SRS, always 
erase the diagnosis code and check warning 
lamp operation to make sure that the system 
functions properly.

AC801105

SRS-harness connector

SRS-ECU harness connector (rear side)

MB992006

<Vehicles without side-airbag and curtain air bag>

<Vehicles with side-airbag and curtain air bag>

AC

CAUTION

If checks are carried out by using the SRS-ECU 
harness connector, observe the following proce-
dures: Insert the special tool extra fine probe 
(MB992006) into connector from harness side 
(rear side), and connect the tester to this probe. If 
any tool than special tool is used, damage to the 
harness and other components will result. Never 
insert the probe directly to the terminals from the 
front of the connector. The terminals are plated 

to increase their conductivity, so that if they are 
touched directly by the probe, the plating may 
break, which will cause drops in reliability.

SPECIAL TOOLS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-10

SPECIAL TOOLS

M1524000701683

Tool

No.

Name

Use

MB990784

MB990784

Ornament remover

Removal of cover.

MB990803

MB990803

Steering wheel puller

Steering wheel disconnection

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

A

B

C

D

E

F

DO NOT USE

MB991955

A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991825
F: MB991826

M.U.T.-III sub-assembly

A: Vehicle 

communication 
interface (V. C. I.)

B: M.U.T.-III USB cable
C: M.U.T.-III main 

harness A (Vehicles 
with CAN 
communication 
system)

D: M.U.T.-III main 

harness B (Vehicles 
without CAN 
communication 
system)

E: M.U.T.-III measure 

adapter

F: M.U.T.-III trigger 

harness

CAUTION

For vehicles with CAN 
communication, use M.U.T.-III 
main harness A to send 
simulated vehicle speed. If you 
connect M.U.T.-III main harness 
B instead, the CAN 
communication does not 
function correctly.
Checking diagnosis code

MB991884

MB991884

Resistor harness (For 
pre-tensioner)

Seat belt pre-tensioner and 
curtain air bag circuit check

MB991865

MB991865

Dummy resistor

SRS air bag and seat belt pre-
tensioner circuit check