Mitsubishi Outlander (2003+). Manual - part 569

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-91

STEP 4. Measure the resistance at C-26 A/C-ECU 
connector.

(1) Remove the relay, and measure at the junction 

block side.

(2) Continuity between terminal 27 and body earth.

OK: 2 ohm or less

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

 Go to Step 5.

STEP 5. Connector check: C-26 A/C-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the connector.

AC308718

Connector: C-26

AT

C-26(B)

Harness side

<LHD>

29

21

35

27

24

323130

22

23

33

25

34

26

36

28

AC308735

Connector: C-26

BA

C-26(B)

Harness side

<RHD>

29

21

35

27

24

323130

22

23

33

25

34

26

36

28

AC301541CL

Connector C-26
(Harness side)

29

21

35

27

24

323130

22

23

33

25

34

26

36

28

AC308718

Connector: C-26

AT

C-26(B)

Harness side

<LHD>

29

21

35

27

24

323130

22

23

33

25

34

26

36

28

AC308735

Connector: C-26

BA

C-26(B)

Harness side

<RHD>

29

21

35

27

24

323130

22

23

33

25

34

26

36

28

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-92

STEP 6. Check the wiring harness between C-26 
A/C-ECU connector terminal No.27 and the earth.

•

Check the A/C-ECU 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.

STEP 7. Measure the voltage at C-27 A/C-ECU 
connector. 

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Measure the voltage between terminal 3 and 

earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Replace the automatic air conditioner 

control panel (A/C-ECU).

NO : 

 Go to Step 8.

AC308718

Connector: C-26

AT

C-26(B)

Harness side

<LHD>

29

21

35

27

24

323130

22

23

33

25

34

26

36

28

AC308735

Connector: C-26

BA

C-26(B)

Harness side

<RHD>

29

21

35

27

24

323130

22

23

33

25

34

26

36

28

AC308718

Connector: C-27

AU

C-27(B)

<LHD>

8

2

10 9

1

5

3

4

6

7

20191817161514131211

Harness side

AC308735

Connector: C-27

BB

C-27(B)

Harness side

<RHD>

8

2

10 9

1

5

3

4

6

7

20191817161514131211

AC301541CM

Connector C-27
(Harness side)

8

2

10 9

1

5

3

4

6

7

20191817161514131211

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-93

STEP 8. Connector check: C-27 A/C-ECU 
connector

Q:  Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the connector.

STEP 9. Check the wiring harness between C-27 
A/C-ECU connector terminal No.3 and relay box 
fuse No.22.

AC308718

Connector: C-27

AU

C-27(B)

<LHD>

8

2

10 9

1

5

3

4

6

7

20191817161514131211

Harness side

AC308735

Connector: C-27

BB

C-27(B)

Harness side

<RHD>

8

2

10 9

1

5

3

4

6

7

20191817161514131211

AC308718

Connector: C-27

AU

C-27(B)

<LHD>

8

2

10 9

1

5

3

4

6

7

20191817161514131211

Harness side

AC308735

Connector: C-27

BB

C-27(B)

Harness side

<RHD>

8

2

10 9

1

5

3

4

6

7

20191817161514131211

AC208434AD

Fuse: No.22

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-94

NOTE: 

Prior to the wiring harness inspection, check junction 
block connectors C-202, C-204, intermediate 
connectors C-116 <LHD>, A-14 <RHD>, C-122 
<RHD> and joint connector C-02, and repair if 
necessary.

•

Check the A/C-ECU power supply (battery 
back-up) line for open or short circuit.

Q: Is the check result normal?

YES : 

The trouble can be an intermittent 

malfunction (Refer to GROUP 00, How to 
Cope with Intermittent Malfunction 

P.00-6

).

NO : 

Repair the wiring harness.

AC308717

Connectors: C-02, C-116

AU

C-116

Harness side

Harness side

C-02

C-116

C-02

<LHD>

33

22

11

28

17

16

15

14

13

12

25

2324

2627

3

1 2

4 5

21

20

19

18

2930

32

31

7

6

8

10

9

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

AC308769

BC

C-02

Connector: C-02             

<RHD>

33

22

11

28

17

16

15

14

13

12

25

2324

2627

3

1 2

4 5

21

20

19

18

2930

32

31

7

6

8

10

9

AC308735

Connector: C-116             

BD

C-116

<RHD>

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