Mitsubishi Outlander (2003+). Manual - part 97

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-251

OPERATION

œ

The battery voltage is applied to the fan control 
relay (terminal No. 1) from the engine control 
relay (terminal No. 1) and is earthed to the vehi-
cle body from the fan control relay (terminal No. 
3).

œ

The battery voltage is applied to the fan control 
relay (terminal No. 4).

œ

When the fan control relay is in "ON" position, the 
battery voltage is supplied to the fan controller 
(terminal No. 3) from the fan control relay (termi-
nal No. 2).

FUNCTION

œ

When the engine control relay is in "ON" position, 
the fan control relay is also simultaneously 
placed in "ON" position. Accordingly, the battery 
voltage is supplied to the fan controller.

PROBABLE CAUSE

œ

Failed fan control relay

œ

Failed fan controller

œ

Failed radiator fan motor

œ

Failed condenser fan motor

œ

Open/short circuit in fan control relay circuit or 
loose connector contact

œ

Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Connector check: A-10X fan control 
relay connector

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

Repair.

STEP 2. Check fan control relay.

œ

Check fan control relay (Refer to GROUP 14 

-

 

On

-

vehicle Service 

3

14



).

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Replace fan control relay.

STEP 3. Measure resistance at A-10X fan control 
relay connector.

œ

Remove relay and measure at relay box side.

œ

Resistance between terminal No. 3 and earth.

OK: 2 

W

 or less

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Check and repair harness between A-10X 

(terminal No. 3) fan control relay connector 
and body earth.

œ

Check earthing line for open circuit 
and damage.

STEP 4. Measure voltage at A-10X fan control 
relay connector.

œ

Remove relay and measure at relay box side.

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 6 .

NO : 

Go to Step 5 .

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

AK300324

3

1

2

4

AB

CONNECTOR: A-10X

A-10X

Harness side
connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-252

STEP 5. Connector check: B-17X engine control 
relay connector

Q: Is the check result normal?

YES : 

Check intermediate connectors A-14 and C-

17, and repair if necessary. If intermediate 
connectors are normal, check and repair 
harness between B-17X (terminal No. 1) 
engine control relay connector and A-10X 
(terminal No. 1) fan control relay connector.

œ

Check power supply line for 
open/short circuit.

NO : 

Repair.

STEP 6. Measure voltage at A-10X fan control 
relay connector.

œ

Remove relay, and measure at relay box side.

œ

Voltage between terminal No. 4 and earth

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Check and repair harness between battery 

and A-10X (terminal No. 4) fan control relay 
connector.

œ

Check power supply line for 
open/short circuit.

STEP 7. Connector check: A-20 fan controller 
connector

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Repair.

AK300255

2

1

3

4

Relay box’s
triangle marks

AB

CONNECTOR: B-17X

B-17X

Harness side
connector

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

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-253

STEP 8. Measure voltage at A-20 fan controller 
connector.

œ

Disconnect connector, and measure at harness 
side.

œ

Ignition switch: ON

œ

Voltage between terminal No. 3 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Go to Step 9 .

STEP 9. 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 open/short circuit.

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Repair.

STEP 10. Connector check: B-17X engine control 
relay connector

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Repair.

STEP 11. Check harness between B-17X 
(terminal No. 1) engine control relay connector 
and A-10X (terminal No. 1) fan control relay 
connector.

NOTE: Before checking harness, check intermediate 
connectors A-14 and C-17, and repair if necessary.

œ

Check power supply line for damage.

Q: Is the check result normal?

YES : 

Check and repair harness between A-10X 

(terminal No. 3) fan control relay connector 
and body earth.

œ

Check earthing line for damage.

NO : 

Repair.

AK203423

1

2

3

Harness side
connector

A-20 (GR)

AC

Connector: A-20

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

AK300255

2

1

3

4

Relay box’s
triangle marks

AB

CONNECTOR: B-17X

B-17X

Harness side
connector

AK300255

2

1

3

4

Relay box’s
triangle marks

AB

CONNECTOR: B-17X

B-17X

Harness side
connector

AK300324

3

1

2

4

AB

CONNECTOR: A-10X

A-10X

Harness side
connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-254

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

Q: Is the check result normal?

YES : 

Go to Step 13 .

NO : 

Repair.

STEP 13. Fan motor drive test.

œ

Disconnect C-134 engine-ECU connector.

œ

Ignition switch: ON

OK: Fan motor rotates.

Q: Is the check result normal?

YES : 

Go to Step 14 .

NO : 

Go to Step 15 .

STEP 14. MUT-II actuator test

œ

Item 21: Fan controller

OK: Fan motor rotates.

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 15. Measure voltage at C-134 engine-ECU 
connector.

œ

Disconnect connector, and measure at harness 
side.

œ

Ignition switch: ON

œ

Voltage between terminal No. 21 and earth.

OK: 4.9 

-

 5.1 V

Q: Is the check result normal?

YES : 

Go to Step 16 .

NO : 

Go to Step 18 .

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

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