Mitsubishi Outlander (2003+). Manual — part 364

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-55

STEP 4. Check the passenger's seat belt
pre-tensioner. (Check whether the diagnosis
code is reset.)
(1) Disconnect the negative battery terminal.

(2) Disconnect passenger'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 28 set?

YES :

Go to Step 5.

NO :

Replace the passenger'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 passenger’s
seat belt pre-tensioner connector D-43 to
short the squib circuit.

AC301408AI

Connector: D-43

Harness side
connector
(front view)

1

2

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

AC301408AI

Connector: D-43

Harness side
connector
(front view)

1

2

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-56

(2) Disconnect passenger'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.

CAUTION

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

between terminals 27, 28 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 27 and 28.

OK: Open circuit.

Q: Is the check result normal?

YES :

Erase the diagnosis code memory, and

check diagnosis code. If diagnosis code 28
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 passenger’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.27 and 28) and passenger’s
seat belt pre-tensioner connector D-43
(terminal No.1 and 2), 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 28 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

).

AC300147AF

Flat-tip screw
driver

Locking button

D-43 Passenger's

seat belt

pre-tensioner

connector

D-43 Harness side connector

AC300994

AB

AB

A

A

C-114 Harness side
connector (front view)

Terminal

Cable tie

Short bar

4 mm or more

Section
A - A

34 35 36 37 38 39 40 41 42

25 26 27 28 29 30 31 32 33

21 22

23 24

AC300996AB

C-114 Harness side
connector (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

AC301408AI

Connector: D-43

Harness side
connector
(front view)

1

2

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-57

Code No.28: Passenger's (front) seat belt pre-tensioner (squib) system (short-circuit 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 passenger’s seat
belt pre-tensioner squib wire shorted to the other.

PROBABLE CAUSES

•

Improper engaged connector or defective short
spring*

•

Short circuit between the passenger'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-29 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
(LH)

AIR BAG
DRIVE CIRCUIT

Passenger's (Front) Seat Belt Pre-tensioner (Squib)

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-58

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 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 passenger’s seat belt pre-tensioner
connector D-29 (Check whether the diagnosis
code is reset.)
(1) Disconnect the negative battery terminal.

(2) Disconnect connectors C-114 and D-29, and then

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

diagnosis code.

Q: Is diagnosis code 28 set?

YES :

Go to Step 4.

NO :

The procedure is complete. It is assumed
that diagnosis code 28 set as connector
C-114 or D-29 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

AC308787

Connector: D-29

AE

1

2

Harness side

D-29 (B)

AC300147AE

Flat-tip screw
driver

Locking button

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

D-29 Harness side connector