Mitsubishi Outlander (2003+). Manual - part 375

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-99

DIAGNOSIS PROCEDURE

STEP 1. Check the passenger's air bag module. 
(Check whether the diagnosis code is reset.)
(1) Disconnect the negative battery terminal.

(2) Unclip passenger’s air bag module connector 

C-09.

(3) Connect special tool dummy resistor (MB991865) 

to special tool resistor harness (MB991866).

CAUTION

Do not insert a test probe into the terminal from 
its front side directly as the connector contact 
pressure may be weakened.
(4) Disconnect the passenger's air bag module 

connector C-09, and insert special tool 
(MB991866) into the harness side connector by 
backprobing.

(5) Connect the negative battery terminal.

(6) Erase the diagnosis code memory, and check the 

diagnosis code.

Q:  Is diagnosis code 65 set?

YES : 

Go to Step 2.

NO : 

Replace the passenger's air bag module 
(Refer to 

P.52B-179

). Then go to Step 3.

STEP 2. Measure the resistance at the SRS-ECU 
connector C-115. (Check whether the diagnosis 
code is reset.)

(1) Disconnect SRS-ECU connector C-115.

CAUTION

To prevents the air bag from deploying 
unintentionally, disconnect the passenger’s air 
bag module connector C-09 to short the squib 
circuit.

AC301718

Connector: C-09 <LHD>

AD

C-09 (R)

Glove box striker

2 1

Harness side 
connector (front view)

AC309254 AB

Connector: C-09 <RHD>

C-09 (R)

Glove box striker

2 1

Harness side 
connector (front view)

AC300956AB

MB991865 (Dummy
resistor : 3 

Ω)

C-09 Harness side
connector

C-09 Passenger's
air bag module connector

MB991866
(Resistor harness)

AC301661AC

Harness side
connector
(front view)

Connector: C-115

SRS-ECU

C-115 (Y)

Center lower
panel

1110 9

1

2

3

1413

12

4

5

6

16

8

15

7

17

18

19

20

AC301718

Connector: C-09 <LHD>

AD

C-09 (R)

Glove box striker

2 1

Harness side 
connector (front view)

AC309254 AB

Connector: C-09 <RHD>

C-09 (R)

Glove box striker

2 1

Harness side 
connector (front view)

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-100

(2) Unclip passenger’s air bag module connector 

C-09.

CAUTION

Do not insert a test probe into the terminal from 
its front side directly as the connector contact 
pressure may be weakened.
(3) Measure the resistance between C-115 harness 

side connector terminals 9, 10 and body earth.

OK: Open circuit

Q: Is the check result normal.

YES : 

Erase the diagnosis code memory, and 

check the diagnosis code. If diagnosis code 
65 sets, replace the SRS-ECU (Refer to 

P.52B-178

). Then go to Step 3    .

NO : 

Repair the harness wires between 
SRS-ECU connector C-115 (terminal No.9 
and 10) and passenger's air bag module 
connector C-09 (terminal No.1 and 2). Then 
go to Step 3.

STEP 3. Check whether the diagnosis code is 
reset.

Q: Is diagnosis code 65 set?

YES : 

Return to Step 1.

NO : 

The procedure is complete (If no 
malfunctions are found in all steps, an 
intermittent malfunction is suspected. Refer 
to GROUP 00 

−

 How to Use 

Troubleshooting/Inspection Service Points 

P.00-6

).

13 14 15 16 17 18 19 20

5 6 7 8 9 10 11 12

1 2

3 4

AC301035AB

C-115 Harness side connector (rear view)

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-101

Code No.66: Driver's seat belt pre-tensioner (squib) system (short-circuited to the power supply) 
<L.H. drive vehicles>

OPERATION
The SRS-ECU judges how severe a collision is by 
detecting signals from the front impact sensors and 
the front air bag analog G-sensor. If the impact is 
over a predetermined level, the SRS-ECU outputs an 
ignition signal. At this time, if the front air bag safing 
G-sensor is on, the pre-tensioner will deploy.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if the driver's seat belt 
pre-tensioner wire(s) are short-circuited to the power 
supply.

PROBABLE CAUSES

•

Damaged wiring harnesses or connectors

•

Short to the power supply in the driver's seat belt 
pre-tensioner (squib) harness

•

Malfunction of the SRS-ECU

SEAT BELT
PRETENSIONER
(LH)

CONNECTOR
LOCK
SWITCH

AIR BAG
DRIVE CIRCUIT

NOTE

CONNECTOR
COUPLED: ON
CONNECTOR
UNCOUPLED: OFF

SRS-ECU

MICROCOMPUTER

CONNECTOR
LOCK
SWITCH

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Gray     R : Red     P : Pink     V : Violet   

AC301789AB

Driver's Seat Belt Pre-Tensioner (Squib)

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-102

DIAGNOSIS PROCEDURE

STEP 1. Check the driver's seat belt 
pre-tensioner. (Check whether the diagnosis 
code is reset.)
(1) Disconnect the negative battery terminal.

(2) Disconnect driver's seat belt pre-tensioner 

connector D-29. Use a flat-tipped screwdriver to 
pull out the locking button at the harness side 
connector, and then disconnect the connector.

(3) Connect special tool dummy resistor (MB991865) 

to special tool resistor harness (MB991884).

(4) Connect special tool (MB991884) to the D-29 

harness side connector.

(5) Connect the negative battery terminal.
(6) Erase diagnosis code memory, and check the 

diagnosis code.

Q: Is diagnosis code 66 set?

YES : 

Go to Step 2.

NO : 

Replace the driver's seat belt pre-tensioner 
(Refer to 

P.52B-188

). Then go to Step 4.

STEP 2. Measure the voltage at the SRS-ECU 
connector C-114.

(1) Disconnect SRS-ECU connector C-114.
(2) Disconnect driver's seat belt pre-tensioner 

connector D-29. Use a flat-tipped screwdriver to 
pull out the locking button at the harness side 
connector, and then disconnect the connector.

(3) Turn the ignition switch to the "ON" position.

CAUTION

Do not insert a test probe into the terminal from 
its front side directly as the connector contact 
pressure may be weakened.
(4) Measure the voltage between C-114 harness 

side connector terminals 29, 30 and body earth.

OK: 0 V

Q: Is the measured voltage within the specified 

range?
YES : 

Erase the diagnosis code memory, and 

check the diagnosis code. If diagnosis code 
65 sets, replace the SRS-ECU (Refer to 

P.52B-178

). Then go to Step 4     .

NO : 

Go to Step 3.

AC301410

Connector: D-29

AI

1

2

Harness side
connector
(front view)

AC300147AE

Flat-tip screw
driver

Locking button

D-29 Driver's seat 
belt pre-tensioner 
connector

D-29 Harness side connector

MB991884
MB991885

AC300975AD

MB991865
(Dummy resistor : 3 

Ω)

MB991884
(Resistor
harness)

D-29 Harness side connector

AC301661

Connector: C-114

AE

SRS-ECU

C-114 (Y)

Center lower
panel

Harness side
connector 
(front view)

40

23

24

41

32

42

33

31

29
38

39

30

37

28

21

22

35

26

36

27

34

25

34 35 36 37 38 39 40 41 42

25 26 27 28 29 30 31 32 33

21 22

23 24

AC301037AB

C-114 Harness side 
connector (rear view)