Mitsubishi Outlander (2003+). Manual - part 387

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-147

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 
(LH) wire(s) are short-circuited to the power supply.

PROBABLE CAUSES

•

Damaged wiring harnesses or connectors

•

Short to the power supply in the side air bag 
module (LH) (squib) harness

•

Malfunction of the SRS-ECU

DIAGNOSIS PROCEDURE

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

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

connector D-08.

(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-08 

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 85 set?

YES : 

Go to Step 2.

NO : 

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

−

 Front 

Seat 

P.52A-33

). Then go to Step 3.

STEP 2. Measure the voltage 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 (LH) connector D-08 to short the 
squib circuit.

(2) Disconnect left hand side air bag module (LH) 

connector D-08.

AC202027

Connector: D-08

AO

D-08 (R)

2 1

Harness side
connector
(front view)

AC301039AC

MB991865 (Dummy
resistor : 3 

Ω)

D-08 Harness side
connector

D-08 Side air bag
module (LH) 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-08

AO

D-08 (R)

2 1

Harness side
connector
(front view)

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-148

(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 21, 22 and body earth.

OK: 0 V

Q: Is the check result normal.

YES : 

Erase the diagnosis code memory, and 

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

P.52B-178

). Then go to Step 3  .

NO : 

Repair the harness wires between 
SRS-ECU connector C-114 (terminal No.21 
and 22) and side air bag module (LH) 
connector D-08 (terminal No.1 and 2). Then 
go to Step 3.

STEP 3. Check whether the diagnosis code is 
reset.

Q: Is diagnosis code 85 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

AC301050AB

C-114 Harness side
connector (rear view)

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-149

Code No.86: Side air bag module (squib) (LH) system (short-circuited to the earth)

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 
(LH) wire(s) are short-circuited to the earth.

PROBABLE CAUSES

•

Damaged wiring harnesses or connectors

•

Short to earth in the left hand side air bag module 
(squib) harness

•

Malfunction of the SRS-ECU

DIAGNOSIS PROCEDURE

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

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)
(LH)

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       

AC301797

Side Air Bag Module (LH) (Squib) Circuit

AB

AC202027

Connector: D-08

AO

D-08 (R)

2 1

Harness side
connector
(front view)

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-150

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

connector D-08.

(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-08 

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 86 set?

YES : 

Go to Step 2.

NO : 

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

−

 Front 

Seat 

P.52A-33

). Then go to Step 3.

STEP 2. Measure the resistance at the SRS-ECU 
connector C-114.

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

(2) Disconnect side air bag module (LH) connector 

D-08.

CAUTION

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

AC301039AC

MB991865 (Dummy
resistor : 3 

Ω)

D-08 Harness side
connector

D-08 Side air bag
module (LH) 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-08

AO

D-08 (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

AC301058AB

C-114 Harness side
connector (rear view)