Mitsubishi Outlander (2003+). Manual - part 382

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-127

STEP 4. Check the side air bag module (RH). 
(Check whether the diagnosis code is reset.)
(1) Disconnect the negative battery terminal.

(2) Disconnect the side air bag module (RH) 

connector D-40.

(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) Insert special tool (MB991866) into the D-40 

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 71 set?

YES : 

Go to Step 5.

NO : 

Replace the seat back assembly of the front 
seat (RH) (Refer to GROUP 52A 

−

 Front 

Seat 

P.52A-33

). Then go to Step 6.

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 side air bag 
module (RH) connector D-40 to short the 
squib circuit.

(2) Disconnect side air bag module connector D-40.

CAUTION

Insert an insulator such as a cable tie to a depth 
of 4mm or more, otherwise the short spring will 
not be released.

AC202027

Connector: D-40

AM

D-40 (R)

2 1

Harness side
connector
(front view)

AC301039AB

MB991865 (Dummy
resistor : 3 

Ω)

D-40 Harness side
connector

D-40 Side air bag
module (RH) connector

MB991866
(Resistor harness)

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

AC202027

Connector: D-40

AM

D-40 (R)

2 1

Harness side
connector
(front view)

AC301041AB

A

A

C-114 Harness side
connector (front view)

Terminal

Cable tie

Section
A - A

4 mm or more

Short spring

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-128

(3) Insert a cable tie [3 mm wide, 0.5 mm thick] 

between terminals 23, 24 and the short spring 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 23 and 24.

OK: Open circuit

Q: Is the check result normal?

YES : 

Erase the diagnosis code memory, and 

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

P.52B-178

). Then go to Step 6  .

NO : 

Repair the harness wires between 
SRS-ECU connector C-114 (terminal No.23 
and 24) and side air bag module (RH) 
connector D-40 (terminal No.2 and 1). Then 
go to Step 6.

STEP 6. Check whether the diagnosis code is 
reset.

Q: Is diagnosis code 71 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

).

34 35 36 37 38 39 40 41 42

25 26 27 28 29 30 31 32 33

21 22

23 24

AC301042AB

C-114 Harness side
connector (rear view)

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-129

Code No.72: Side air bag module (squib) (RH) system (open-circuited in the squib circuit)

OPERATION

•

The SRS-ECU judges how severe a collision is 
by detecting signals from the left and right side 
impact sensors. If the impact is over a 
predetermined level, the SRS-ECU outputs an 
ignition signal. At this time, if the side air bag 
safing G-sensor is on, the SRS side air bag will 
inflate.

•

The ignition signal is input to the side air bag 
module to inflate the side air bag.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if the side air bag squib 
(RH) wire(s) are open-circuited.

PROBABLE CAUSES

•

Open circuit in the side air bag module (RH) 
(squib) circuit

•

Improper connector contact

•

Malfunction of the SRS-ECU

AIR BAG DRIVE 
CIRCUIT

CONNECTOR
LOCK
SWITCH

NOTE

CONNECTOR
COUPLED: ON
CONNECTOR
UNCOUPLED: OFF

CONNECTOR
LOCK
SWITCH

MICROCOMPUTER

SRS-ECU

SIDE AIR BAG 
MODULE 
(SQUIB) 
(RH)

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       

AC301796

Side Air Bag Module (RH) (Squib) Circuit

AB

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-130

DIAGNOSIS PROCEDURE

STEP 1. Check the side air bag module (RH). 
(Check whether the diagnosis code is reset.)
(1) Disconnect the negative battery terminal.

(2) Disconnect the side air bag module (RH) 

connector D-40.

(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) Insert special tool (MB991866) into the D-40 

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 72 set?

YES : 

Go to Step 2.

NO : 

Replace the seat back assembly of the front 
seat (RH) (Refer to GROUP 52A 

−

 Front 

Seat 

P.52A-33

). Then go to Step 3.

STEP 2. Measure the resistance between 
SRS-ECU connector C-114 (terminal No.23 and 
24) and the side air bag module (RH) connector 
D-40 (terminal No.2 and 1).

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

air bag module (RH) connector D-40.

CAUTION

Do not insert a test probe into the terminal from 
its front side directly as the connector contact 
pressure may be weakened.

AC202027

Connector: D-40

AM

D-40 (R)

2 1

Harness side
connector
(front view)

AC301039AB

MB991865 (Dummy
resistor : 3 

Ω)

D-40 Harness side
connector

D-40 Side air bag
module (RH) connector

MB991866
(Resistor harness)

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

AC202027

Connector: D-40

AM

D-40 (R)

2 1

Harness side
connector
(front view)

34 35 36 37 38 39 40 41 42

25 26 27 28 29 30 31 32 33

21 22

23 24

1 2

AC301043AB

C-114 Harness side
connector (rear view)

D-40 Harness side
connector (rear view)