Mitsubishi Outlander (2003+). Manual - part 361

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-43

Code No.26: Driver's pre-tensioner (squib) system (short-circuited between terminals of the squib 
circuit) <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 one driver’s 
pre-tensioner squib wire shorted to the other.

PROBABLE CAUSES

•

Improper engaged connector or defective short 
spring*

•

Short circuit between the driver's seat belt 
pre-tensioner (squib) circuit terminals

•

Damaged connector(s)

•

Malfunction of the SRS-ECU

NOTE: *: The squib circuit connectors integrate a 
"short" spring (which prevents the air bag from 
deploying unintentionally due to static electricity by 
shorting the positive wire to the earth wire in the 
squib circuit when the connectors are disconnected). 
Therefore, if connector C-114 or D-43 is damaged or 
improperly engaged, the short spring may not be 
released when the connector is connected.

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-44

DIAGNOSIS PROCEDURE

STEP 1. MUT-II/III diagnosis code

CAUTION

To prevent damage to MUT-II, always turn the 
ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting MUT-II.
(1) Turn the ignition switch to the "ON" position.
(2) Check if the diagnosis code is set.
(3) Turn the ignition switch to the "LOOK" (OFF) 

position.

Q: Is diagnosis code 34 set?

YES : 

Go to Step 2.

NO : 

Go to Step 3.

STEP 2. Connector check: SRS-ECU connector 
C-114

Q: Is the connector correctly engaged?

YES : 

Go to Step 3.

NO : 

Engage the connector correctly. Then go to 
Step 7.

STEP 3. Connector check: SRS-ECU connector 
C-114 and driver’s seat belt pre-tensioner 
connector D-43. (Check whether the diagnosis 
code is reset.)
(1) Disconnect the negative battery terminal.

(2) Disconnect connectors C-114 and D-43, and then 

reconnect them. For 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) Connector the negative battery terminal.
(4) Erase the diagnosis code memory, and check the 

diagnosis code.

Q: Is diagnosis code 26 set?

YES : 

Go to Step 4.

NO : 

The procedure is complete. It is assumed 
that diagnosis code 26 set as connector 
C-114 or D-43 was engaged improperly.

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

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

Connector: D-43

AG

Harness side

D-43 (B)

AC300147AF

Flat-tip screw
driver

Locking button

D-43 Passenger's

seat belt

pre-tensioner 

connector

D-43 Harness side connector

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-45

STEP 4. 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 then check 

the diagnosis code.

Q: Is diagnosis code 26 set?

YES : 

Go to Step 5.

NO : 

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

P.52B-188

). Then go to Step 7.

STEP 5. Measure the resistance at the SRS-ECU 
connector C-114.

(1) Disconnect SRS-ECU connector C-114.

DANGER

To prevents the air bag from deploying 
unintentionally, disconnect the driver’s seat 
belt pre-tensioner connector D-43 to short 
the squib circuit.

(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 

AC308785

Connector: D-43

AG

Harness side

D-43 (B)

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

AC308785

Connector: D-43

AG

Harness side

D-43 (B)

AC300147AF

Flat-tip screw
driver

Locking button

D-43 Passenger's

seat belt

pre-tensioner 

connector

D-43 Harness side connector

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-46

connector, and then disconnect the connector.

CAUTION

Insert an insulator such as a cable tie to a depth 
of 4mm or more, otherwise the short bar will not 
be released.
(3) Insert a cable tie [3 mm wide, 0.5 mm thick] 

between terminals 29, 30 and the short bar to 
release the short spring.

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 resistance between C-114 harness 

side connector terminals 29 and 30.

OK: Open circuit

Q: Is the check result normal?

YES : 

Erase the diagnosis code memory, and 

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

P.52B-178

). Then go to Step 7      .

NO : 

Go to Step 6.

STEP 6. 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 

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 7.

NO : 

Repair or replace it. Then go to Step 7.

STEP 7. Check whether the diagnosis code is 
reset.

Q: Is diagnosis code 26 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

).

AC300977

Section
A - A

C-114 Harness side connector
(front view)

Cable tie

Short spring

4 mm or more

Terminal

A

A

AB

34 35 36 37 38 39 40 41 42

25 26 27 28 29 30 31 32 33

21 22

23 24

AC300985AB

C-114 Connector
harness side (rear view)

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

Connector: D-43

AG

Harness side

D-43 (B)