Mitsubishi Outlander (2003+). Manual - part 98

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-255

STEP 16. Check harness between A-10X 
(terminal No. 4) fan control relay connector and 
battery.

œ

Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 17 .

NO : 

Repair.

STEP 17. Check harness between A-10X 
(terminal No. 2) fan control relay connector and 
A-20 (terminal No. 3) fan controller connector.

œ

Check output line for damage.

Q: Is the check result normal?

YES : 

Replace fan motor and fan controller.

NO : 

Repair.

STEP 18. Check harness between A-20 (terminal 
No. 2) fan controller connector and C-134 
(terminal No. 21) engine-ECU connector.

NOTE: Before checking harness, check intermediate 
connector A-14, and repair if necessary.

œ

Check output line for short circuit.

Q: Is the check result normal?

YES : 

Replace fan motor and fan controller.

NO : 

Repair.

AK300324

3

1

2

4

AB

CONNECTOR: A-10X

A-10X

Harness side
connector

AK300324

3

1

2

4

AB

CONNECTOR: A-10X

A-10X

Harness side
connector

AK203423

1

2

3

Harness side
connector

A-20 (GR)

AC

Connector: A-20

AK203423

1

2

3

Harness side
connector

A-20 (GR)

AC

Connector: A-20

AK300257

1

14

4

19

5

22

6

17

8

15

9

18

7

20

16

2

13 12

23

24

25

26

21

3

10

11

AB

CONNECTOR: C-134

C-134

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-256

Inspection Procedure 26: A/C Switch System

OPERATION

œ

The battery voltage is applied to the engine-ECU 
(terminal No. 45) from the A/C-ECU (terminal No. 
4) <Manual A/C> or A/C-ECU (terminal No. 34) 
<Auto A/C>.

FUNCTION

œ

When the A/C switch is in "ON" position, A/C 
switch ON signal is inputted to the engine-ECU 
from the A/C-ECU. In response to the signal, the 
engine-ECU controls the A/C compressor relay.

PROBABLE CAUSE

œ

Failed A/C

œ

Failed A/C system

œ

Open/short circuit in A/C circuit or loose connec-
tor contact

œ

Failed engine-ECU

AK300325

1

9

2

10

3

11

4

12

5

13

6

14

7

15

8

16

34

33

32

36

35

37

42

45

31

39

38

46

40 41

43 44

4 <Manual A/C>

34 <Auto A/C>

45

7

C-104

Engine-ECU

A/C-ECU

A/C Switch circuit

AB

G-B

G-B

C-135

C-06

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

MULTIPORT FUEL INJECTION (MFI)

13A-257

DIAGNOSIS PROCEDURE

STEP 1. Measure voltage at C-135 engine-ECU 
connector.

œ

Measure engine-ECU terminal voltage.

œ

Engine: Running at idle

œ

A/C set temperature:
Maximum Cool when temperature in cabin is 

25

•

C or more

Maximum Hot when temperature in cabin is 25

•

C 

or less

œ

Voltage between terminal No. 45 and earth.

OK: 

System voltage (when A/C is ON)
0.5 V or less (when A/C is OFF)

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Go to Step 2 .

STEP 2. Measure voltage at C-06 A/C-ECU 
connector <Manual A/C> or C-26 A/C-ECU 
connector <Auto A/C>.

œ

Measure engine-ECU terminal voltage.

œ

Engine: Idling

œ

A/C set temperature: 
Maximum Cool when temperature in cabin is 

25

•

C or more

Maximum Hot when temperature in cabin is 25

•

C 

or less

œ

Voltage between terminal No. 4 and earth <Man-
ual A/C>

œ

Voltage between terminal No. 34 and earth <Auto 
A/C>

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Go to Step 3 .

AK300256

34 33 32

36 35

37

42

45

31

39

38

46

40

41

43

44

AB

CONNECTOR: C-135

C-135

Harness side connector

AK300326

8

16

7

15

6

14

5

13

4

12

3

11

2

10

1
9

Harness side
connector

C-06 (B)

AB

Connector: C-06
<Manual A/C>

AK300327

28
36

27
35

26
34

25
33

24
32

23
31

22
30

21
29

Harness side
connector

C-26 (B)

AB

Connector: C-26
<Auto A/C>

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-258

STEP 3. Connector check: C-06 A/C-ECU 
connector <Manual A/C> or C-26 A/C-ECU 
connector <Auto A/C> C-135 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Repair.

STEP 4. Check harness between C-06 A/C-ECU 
connector <Manual A/C> or C-26 A/C-ECU 
connector <Auto A/C> and C-135 (terminal No. 
45) engine-ECU connector.

NOTE: Before checking harness, check intermediate 
connector C-104, and repair if necessary.

œ

Check output line for short circuit.

Q: Is the check result normal?

YES : 

Check A/C system (Refer to GROUP 55A 

-

 

Troubleshooting 

3

55A



).

NO : 

Repair.

AK300326

8

16

7

15

6

14

5

13

4

12

3

11

2

10

1
9

Harness side
connector

C-06 (B)

AB

Connector: C-06
<Manual A/C>

AK300327

28
36

27
35

26
34

25
33

24
32

23
31

22
30

21
29

Harness side
connector

C-26 (B)

AB

Connector: C-26
<Auto A/C>

AK300256

34 33 32

36 35

37

42

45

31

39

38

46

40

41

43

44

AB

CONNECTOR: C-135

C-135

Harness side connector

AK300326

8

16

7

15

6

14

5

13

4

12

3

11

2

10

1
9

Harness side
connector

C-06 (B)

AB

Connector: C-06
<Manual A/C>

AK300327

28
36

27
35

26
34

25
33

24
32

23
31

22
30

21
29

Harness side
connector

C-26 (B)

AB

Connector: C-26
<Auto A/C>

AK300256

34 33 32

36 35

37

42

45

31

39

38

46

40

41

43

44

AB

CONNECTOR: C-135

C-135

Harness side connector