Mitsubishi Outlander (2003+). Manual - part 388

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-151

(3) Check for continuity between C-114 harness side 

connector terminals 21, 22 and body earth.

OK: Open circuit

Q: Is the check result normal?

YES : 

Erase the diagnosis code memory, and 

check the diagnosis code. If diagnosis code 
86 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 86 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

).

Code No.89: Side impact sensor (RH) communication error Code No.96: Side impact sensor (RH) 
communication impossible

CONSTANT
VOLTAGE CIRCUIT

ANALOG
G SENSOR

INTERFACE
CIRCUIT

MICROCOMPUTER

SIDE IMPACT
SENSOR (RH)

SRS-ECU

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   

AC301791

Side Impact Sensor (RH) Circuit

AB

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-152

OPERATION
The side impact sensor includes an analog G sensor 
and CPU, etc. The CPU monitors the analog G 
sensor output signal. If the CPU judges that the side 
air bags should be deployed, it sends a fire signal to 
the SRS-ECU to deploy the side air bags. Besides 
that, the CPU diagnoses the internal components of 
the side impact sensor. If a malfunction occurs, it 
requests the SRS-ECU to set a diagnosis code.

DIAGNOSIS CODE SET CONDITIONS
These diagnosis codes are set if communication 
between the side impact sensor (RH) and the 
SRS-ECU is not possible or faulty.

PROBABLE CAUSES

•

Damaged wiring harnesses or connectors

•

Malfunction of the side impact sensor (RH)

•

Malfunction of the SRS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check the side impact sensor (RH). 
(MUT-II/III diagnosis code)
(1) Disconnect the negative battery terminal.
(2) Replace the side impact sensor (RH) with the 

side impact sensor (LH).

(3) Connect the negative battery terminal.
(4) Erase diagnosis code memory, and check the 

diagnosis code.

Q: Is diagnosis code 79 or 93 out put?

YES : 

Replace the side impact sensor (RH) with a 

new one (Refer to 

P.52B-186

). Go to Step 3.

NO : 

Go to Step 2.

STEP 2. Check the harness wires for open circuit 
or short circuit between SRS-ECU connector 
C-114 (terminal No.40 and 42) and side impact 
sensor (RH) connector D-41 (terminal No.1 and 
2).

NOTE:  If any harness wires between SRS-ECU 
connector C-114 and side impact sensor (RH) 
connector D-41 are damaged, repair or replace it. 
Then go to Step 3.

Q: Is the check result normal.

YES : 

Erase the diagnosis code memory, and 

check the diagnosis code. If diagnosis code 
89 or 96 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.40 
and 42) and side impact sensor (RH) 
connector D-41 (terminal No.1 and 2). Then 
go to Step 3.

STEP 3. Check whether the diagnosis code is 
reset.

Q: Is diagnosis code 89 or 96 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

).

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

AC201282

Connector: D-41

D-41 

Front seat belt

Front seat

AH

1

2

Harness side
connector
(front view)

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-153

Code No.91: Side impact sensor (LH) voltage error

OPERATION
The side impact sensor includes an analog G sensor 
and CPU, etc. The CPU monitors the analog G 
sensor output signal. If the CPU judges that the side 
air bags should be deployed, it sends a fire signal to 
the SRS-ECU to deploy the side air bags. Besides 
that, the CPU diagnoses the internal components of 
the side impact sensor. If a malfunction occurs, it 
requests the SRS-ECU to set a diagnosis code.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code will set when the power supply 
voltage to the side impact sensor (LH) remains less 
than a predetermined value for 5 seconds. However, 
if the system returns to normal condition, code 
number 91 will be erased automatically and the SRS 
warning lamp will go out.

PROBABLE CAUSES

•

Damaged wiring harness or connectors

•

Malfunction of the side air bag module (LH) 
(squib)

•

Malfunction of the SRS-ECU

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   

CONSTANT
VOLTAGE CIRCUIT

CPU

ANALOG
G SENSOR

INTERFACE
CIRCUIT

MICROCOMPUTER

SIDE IMPACT
SENSOR (LH)

SRS-ECU

Side Impact Sensor(LH) Power Supply Circuit

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-154

DIAGNOSIS PROCEDURE

STEP 1. Measure the voltage at the side impact 
sensor (LH) connector D-27.
(1) Disconnect the negative battery terminal.

(2) Disconnect side impact sensor (LH) connector 

D-27, and measure at the wiring harness side.

(3) Connect the negative battery terminal.
(4) 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.
(5) Measure the voltage between D-27 harness side 

connector terminal 2 and the earth.

OK: 9 V or more

Q: Is the check result normal?

YES : 

Replace the side impact sensor (LH) (Refer 

to 

P.52B-186

). Then go to Step 3.

NO : 

Go to Step 2.

STEP 2. Check the harness wires for open circuit 
or short circuit between SRS-ECU connector 
C-114 (terminal No.34 and 36) and side impact 
sensor (LH) connector D-27 (terminal No.1 and 
2).

AC201281

Connector: D-27

D-27 

Front seat belt

Front seat

AF

AC201627

1 2

AM

D-27 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

AC201281

Connector: D-27

D-27 

Front seat belt

Front seat

AE

1

2

Harness side
connector
(front view)