Mitsubishi Outlander (2003+). Manual - part 100

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-263

STEP 7. Measure voltage at B-27 A/C compressor 
connector.

œ

Disconnect connector, and measure at harness 
side.

œ

Remove B-18X (terminal No. 1 and No. 4) A/C 
compressor relay and short-circuit of harness 
side connector.

œ

Ignition switch: ON

œ

Voltage between terminal No. 1 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Check and repair harness between B-27 

(terminal No. 1) A/C compressor connector 
and B-18X (terminal No. 1) A/C compressor 
relay connector.

œ

Check output line for open/short 
circuit.

STEP 8. Measure voltage at C-134 engine-ECU 
connector.

œ

Measure engine-ECU terminal voltage.

œ

Ignition switch: ON

œ

Voltage between terminal No. 8 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Go to Step 9 .

STEP 9. Connector check: C-134 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Repair.

AK300330

1

AB

CONNECTOR: B-27

B-27 (B)

Harness side
connector

AK300329

2

1

3

4

AB

CONNECTOR: B-18X

B-18X

Harness side
connector

Relay box’s
triangle marks

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

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-264

STEP 10. Check harness between B-18X 
(terminal No. 2) A/C compressor relay connector 
and C-134 (terminal No. 8) engine-ECU 
connector.

œ

Check earthing line for open circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Repair.

STEP 11. MUT-II Data List

œ

Item 49: A/C relay

a. Engine: Idling
b. 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

OK: 

ON (when A/C is ON)
OFF (when A/C is OFF)

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

-

 How to Use 

Troubleshooting/Inspection Service Points 

3

00



).

NO : 

Replace engine-ECU.

STEP 12. Connector check: C-134 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 13 .

NO : 

Repair.

AK300329

2

1

3

4

AB

CONNECTOR: B-18X

B-18X

Harness side
connector

Relay box’s
triangle marks

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

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-265

STEP 13. Check harness between B-18X 
(terminal No. 2) A/C compressor relay connector 
and C-134 (terminal No. 8) engine-ECU 
connector.

œ

Check earthing line for damage.

Q: Is the check result normal?

YES : 

Go to Step 14 .

NO : 

Repair.

STEP 14. Connector check: C-303 ignition switch 
connector

Q: Is the check result normal?

YES : 

Go to Step 15 .

NO : 

Repair.

STEP 15. Check harness between C-303 (terminal 
No. 4) ignition switch connector and B-18X 
(terminal No. 3) A/C compressor relay connector.

NOTE: Before checking harness, check intermediate 
connectors C-106, C-202 <Auto A/C>, C-203 and C-
205 <Manual A/C>, and repair if necessary.

œ

Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 16 .

NO : 

Repair.

STEP 16. Check harness between battery and B-
18X (terminal No. 4) A/C compressor relay 
connector.

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

œ

Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 17 .

NO : 

Repair.

AK300329

2

1

3

4

AB

CONNECTOR: B-18X

B-18X

Harness side
connector

Relay box’s
triangle marks

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

1

2

3

4

5

6

AK300304

CONNECTOR: C-303

C-303

Harness side
connector

AB

1

2

3

4

5

6

AK300304

CONNECTOR: C-303

C-303

Harness side
connector

AB

AK300329

2

1

3

4

AB

CONNECTOR: B-18X

B-18X

Harness side
connector

Relay box’s
triangle marks

AK300329

2

1

3

4

AB

CONNECTOR: B-18X

B-18X

Harness side
connector

Relay box’s
triangle marks

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-266

STEP 17. Check harness between B-18X 
(terminal No. 1) A/C compressor relay connector 
and B-27 (terminal No. 1) A/C compressor relay 
connector.

œ

Check output line for damage.

Q: Is the check result normal?

YES : 

Replace A/C compressor magnet clutch.

NO : 

Repair.

AK300329

2

1

3

4

AB

CONNECTOR: B-18X

B-18X

Harness side
connector

Relay box’s
triangle marks

AK300330

1

AB

CONNECTOR: B-27

B-27 (B)

Harness side
connector