Mitsubishi Outlander (2003+). Manual - part 568

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-87

STEP 15. Connector check: F-01 defogger 
connector

Q: Is the check result normal?

YES : 

Go to Step 16.

NO : 

Repair the connector.

STEP 16. Check the wiring harness between F-01 
defogger connector terminal No.1 and earth.

•

Check the defogger earth 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 or replace the wiring harness.

STEP 17. Check the defogger.

Refer to GROUP 54A, Rear Window Defogger 
Switch Inspection 

P.54A-105

.

Q: Does the defogger work normally? 

YES : 

The trouble can be an intermittent 

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

P.00-6

).

NO : 

Repair the defogger.

AC301658

Harness side

Connector: F-01

AC

1

AC301658

Harness side

Connector: F-01

AC

1

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-88

INSPECTION PROCEDURE 10: Malfunction of the A/C-ECU power supply system.

CIRCUIT OPERATION
The A/C-ECU power system may be defective if the 
air conditioner, defogger, and outside/inside air 
selection damper motor all do not operate normally.

TROUBLESHOOTING HINTS

•

Damaged the wiring harness or connectors

•

Malfunction of the A/C-ECU

IGNITION
SWITCH (IG2)

BATTERY
BACK-UP

A/C-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   

BATTERY

RELAY 
BOX

TROUBLESHOOTING

AUTOMATIC AIR CONDITIONER

55B-89

DIAGNOSIS

STEP 1. Measure the voltage at A/C-ECU 
connector C-26.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 28 and 

body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

 Go to Step 4.

NO : 

 Go to Step 2.

STEP 2. Connector check: C-26 A/C-ECU 
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

AC301541CK

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-90

STEP 3. Check the wiring harness between C-26 
A/C-ECU connector terminal No.28 and the 
ignition switch (IG2).

NOTE: 

Prior to the wiring harness inspection, check junction 
block connectors C-205 and C-203, and repair if 
necessary.

•

Check the A/C-ECU power supply 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.

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

AC308721

Connectors: C-203, C-205

AQ

Junction block (Front view)

C-205

Harness side

Harness side

C-205

C-203

C-203

<LHD>

4

6 5

3

2

1

21

7

16 15

17

18

20 19

1

2

3

4

5

6

23 22

24

25

28

26

27

9

8

10

11

14

12

13

AC308773

Connectors: C-203, C-205

AR

Junction block (Front view)

C-205

Harness side

C-205

C-203

C-203

Harness side

<RHD>

4

6 5

3

2

1

21

7

16 15

17

18

20 19

1

2

3

4

5

6

23 22

24

25

28

26

27

9

8

10

11

14

12

13