Mitsubishi Outlander (2003+). Manual - part 548

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-7

Diagnosis code 13, 14: Outside thermo sensor system

COMMENTS ON TROUBLE SYMPTOM
This code is set when the outside thermo sensor 
circuit is open (Code No.13) or is short (Code 
No.14).

Possible causes

•

Malfunction of the outside thermo sensor

•

Damaged the wiring harness and connectors

•

Malfunction of the automatic air conditioner 
control panel (A/C-ECU)

DIAGNOSIS

Step 1. Check the outside thermo sensor.

Refer to 

P.55B-105

.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Replace the outside thermo sensor.

A/C-ECU

OUTSIDE 
THERMO 
SENSOR

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   

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-8

Step 2. Connector check: A-18 outside thermo 
sensor connector and C-27 A/C-ECU connector

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the connector.

Step 3. Check the wiring harness between A-18 
outside thermo sensor connector (terminals 1 
and 2) and C-27 A/C-ECU connector (terminals 20 
and 7).

AC301653

Connector: A-18

A-18(BR)

AC

2

1

Harness side

AC301397

Connector: C-27 
<LHD>

AX

C-27(B)

Harness side

8

2

10 9

1

5

3

4

6

7

20191817161514131211

AC308735

Connector: C-27 <RHD>

AY

C-27(B)

Harness side

8

2

10 9

1

5

3

4

6

7

20191817161514131211

AC301653

Connector: A-18

A-18(BR)

AC

2

1

Harness side

AC301397

Connector: C-27 
<LHD>

AX

C-27(B)

Harness side

8

2

10 9

1

5

3

4

6

7

20191817161514131211

AC308735

Connector: C-27 <RHD>

AY

C-27(B)

Harness side

8

2

10 9

1

5

3

4

6

7

20191817161514131211

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-9

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector C-116, and repair if 
necessary.

•

Check the sensor signal line and earth line for 
open or short circuit.

Q: Is the check result normal?

YES : 

Replace the automatic air conditioner 

control panel (A/C-ECU)

NO : 

Repair the wiring harness.

AC301395AU

9

21

33

35

24

12

3 4

7

8

5 6

39

28

41

30

18

4243

31

1920

32

40

29

1617

38

27

15

37

36

26

14

13

25

2

1

34

23

11

10

22

Connector: C-116 <LHD>

AC308735

AP

9

21

33

35

24

12

3 4

7

8

5 6

39

28

41

30

18

4243

31

1920

32

40

29

1617

38

27

15

37

36

26

14

13

25

2

1

34

23

11

10

22

Connector: C-116
<RHD>

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-10

Diagnosis code 15, 16: Heater water temperature sensor system

COMMENTS ON TROUBLE SYMPTOM
This code is set when the heater water temperature 
sensor circuit is open (Code No.15) or is short (Code 
No.16).

Possible causes

•

Malfunction of the heater water temperature 
sensor

•

Damaged the wiring harness or connectors

•

Malfunction of the automatic air conditioner 
control panel (A/C-ECU)

DIAGNOSIS

Step 1. Check the heater water temperature 
sensor.

Refer to 

P.55B-104

.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Replace the heater water temperature 
sensor.

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   

HEATER WATER 
TEMPERATURE 
SENSOR

A/C-ECU

Heater Water Temperature Sensor Circuit