Mitsubishi Outlander (2003+). Manual — part 366

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-63

DIAGNOSIS PROCEDURE

STEP 1. 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 29 set?

YES :

Go to Step 2.

NO :

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

P.52B-188

). Then

go to Step 4.

STEP 2. Measure the resistance between
SRS-ECU connector C-114 (terminal No.27 and
28) and the passenger's seat belt pre-tensioner
connector D-43 (terminal No.1 and 2).

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

passenger's seat belt pre-tensioner connector
D-43. 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.

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

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-64

(2) Connect D-43 harness side connector to special

tool resistor harness (MB991884).

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 the following

terminals.

•

SRS-ECU connector C-114 terminal No.27
and the special tool terminal No.2

•

SRS-ECU connector C-114 terminal No.28
and the special tool terminal No.1

OK: Less than 2

Ω

Q: Are the check results normal?

YES :

Erase the diagnosis code memory, and

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

P.52B-178

). Then go to Step 4 .

NO :

Go to Step 3.

STEP 3. 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 4.

NO :

Repair or replace it. Then go to Step 4.

STEP 4. Check whether the diagnosis code is
reset.

Q: Is diagnosis code 29 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

).

AC201287AK

D-43

Harness side
connector

MB991884

34 35 36 37 38 39 40 41 42

25 26 27 28 29 30 31 32 33

21 22

23 24

2

1

AC300997AB

C-114 Harness
side connector
(rear view)

Special tool
MB991884

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-65

Code No.29: Passenger's (front) seat belt pre-tensioner (squib) system (open-circuited in 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 the passenger's seat belt
pre-tensioner squib wire(s) are open-circuited.

PROBABLE CAUSES

•

Open circuit in the passenger's seat belt
pre-tensioner (squib) circuit

•

Improper connector contact

•

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
(LH)

AIR BAG
DRIVE CIRCUIT

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

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-66

DIAGNOSIS PROCEDURE

STEP 1. 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-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.

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

MB991884
MB991885

AC300975AD

MB991865
(Dummy resistor : 3

Ω)

MB991884
(Resistor
harness)

D-29 Harness side connector