Mitsubishi Outlander (2003+). Manual - part 376

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-103

STEP 3. Connector check: SRS-ECU connector 
C-114, driver's seat belt pre-tensioner connector 
D-29 and intermediate connector D-31

Q: Is the check result normal?

YES : 

Check the harness wires for short circuit to 

power supply between SRS-ECU connector 
C-114 (terminal No.29 and 30) and driver's 
seat belt pre-tensioner connector D-29 
(terminal No.2 and 1), and repair if 
necessary. Then go to Step 4.

NO : 

Repair or replace it. than go to Step 4.

STEP 4. Check whether the diagnosis code is 
reset.

Q: Is diagnosis code 66 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

).

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

AC301410

Connector: D-29

AI

1

2

Harness side
connector
(front view)

AC301408

Connector: D-31

AE

11

1

4

3

10
16

13

12

5 6

2

14

8

15

9

7

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-104

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

CONNECTOR
LOCK
SWITCH

NOTE

CONNECTOR
COUPLED: ON
CONNECTOR
UNCOUPLED: OFF

CONNECTOR
LOCK
SWITCH

MICROCOMPUTER

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   

SRS-ECU

SEAT BELT
PRE-TENSIONER
(RH)

AIR BAG
DRIVE CIRCUIT

Driver's Seat Belt Pre-Tensioner (Squib)

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-105

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-43. 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-43 

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-43. 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.

AC308785

AI

Connector: D-43

D-43 (B)

Harness side 
connector 
(front view)

AC300147AF

Flat-tip screw
driver

Locking button

D-43 Passenger's

seat belt

pre-tensioner 

connector

D-43 Harness side connector

MB991884
MB991885

AC300975AE

MB991865
(Dummy resistor : 3 

Ω)

MB991884
(Resistor
harness)

D-43 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)

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-106

STEP 3. Connector check: SRS-ECU connector 
C-114 and driver's seat belt pre-tensioner 
connector D-43

Q: Is the check result normal?

YES : 

Check the harness wires for short circuit to 

power supply between SRS-ECU connector 
C-114 (terminal No.29 and 30) and driver's 
seat belt pre-tensioner connector D-43 
(terminal No.2 and 1), and repair if 
necessary. Then go to Step 4.

NO : 

Repair or replace it. than go to Step 4.

STEP 4. Check whether the diagnosis code is 
reset.

Q: Is diagnosis code 66 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

).

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

AC308785

AI

Connector: D-43

D-43 (B)

Harness side 
connector 
(front view)