Mitsubishi Grandis. Manual - part 773

 

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Mitsubishi Grandis. Manual - part 773

 

 

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-343

STEP 9. Perform voltage measurement at A-26 
fan controller connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: ON

• Voltage between terminal No. 3 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 13 .

NO : 

Go to Step 10 .

STEP 10. Check harness between A-13X 
(terminal No. 2) fan control relay connector and 
A-26 (terminal No. 3) fan controller connector.

• Check power supply line for open/short circuit.

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Repair.

STEP 11. Connector check: B-15X engine control 
relay connector

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Repair or replace.

STEP 12. Check harness between B-15X 
(terminal No. 1) engine control relay connector 
and A-13X (terminal No. 3) fan control relay 
connector.

NOTE: Before checking harness, check intermediate 
connectors A-16 and C-116, and repair if necessary.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Check and repair harness between A-13X 

(terminal No. 1) fan control relay connector 
and A-25 (terminal No. 5) earth connector.

• Check earthing line for damage.

NO : 

Repair.

AK300999

1

2

3

AC

Harness side connector

Connector: A-26

 A-26 (GR)

AK301004

3

1

2

4

AC

Connector: A-13X

 A-13X 

Harness side
connector

AK300999

1

2

3

AC

Harness side connector

Connector: A-26

 A-26 (GR)

AK300967

2

1

3

4

AC

Harness side
connector

B-15X

Connector: B-15X

Relay box’s
triangle marks

AK300967

2

1

3

4

AC

Harness side
connector

B-15X

Connector: B-15X

Relay box’s
triangle marks

AK301004

3

1

2

4

AC

Connector: A-13X

 A-13X 

Harness side
connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-344

STEP 13. Connector check: C-110 engine-ECU 
<M/T> connector or engine-A/T-ECU <A/T> 
connector

Q: Is the check result normal?

YES : 

Go to Step 14 .

NO : 

Repair or replace.

STEP 14. Fan motor drive test.

• Disconnect C-110 engine-ECU <M/T> connector 

or engine-A/T-ECU <A/T> connector.

• Ignition switch: ON

OK: Fan motor rotates.

Q: Is the check result normal?

YES : 

Go to Step 15 .

NO : 

Go to Step 16 .

STEP 15. MUT-III actuator test

• Refer to Actuator Test Reference Table 

P.13A-371

a. 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 

P.00-5

).

NO : 

Replace engine-ECU <M/T> or 
engine-A/T-ECU <A/T>.

AK305618AB

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

Connector: C-110

<L.H. drive vehicles>

<R.H. drive vehicles>

C-110 (GR)

C-110 (GR)

Harness side connector

AK305618AB

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

Connector: C-110

<L.H. drive vehicles>

<R.H. drive vehicles>

C-110 (GR)

C-110 (GR)

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-345

STEP 16. Perform voltage measurement at C-110 
engine-ECU <M/T> connector or engine-A/T-ECU 
<A/T> connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: ON

• Voltage between terminal No. 17 and earth.

OK: 4.9 

− 5.1 V

Q: Is the check result normal?

YES : 

Go to Step 17 .

NO : 

Go to Step 19 .

STEP 17. Check harness between A-13X 
(terminal No. 4) fan control relay connector and 
battery.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 18 .

NO : 

Repair.

STEP 18. Check harness between A-13X 
(terminal No. 2) fan control relay connector and 
A-26 (terminal No. 3) fan controller connector.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Replace fan motor and fan controller.

NO : 

Repair.

AK305618AB

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

Connector: C-110

<L.H. drive vehicles>

<R.H. drive vehicles>

C-110 (GR)

C-110 (GR)

Harness side connector

AK301004

3

1

2

4

AC

Connector: A-13X

 A-13X 

Harness side
connector

AK301004

3

1

2

4

AC

Connector: A-13X

 A-13X 

Harness side
connector

AK300999

1

2

3

AC

Harness side connector

Connector: A-26

 A-26 (GR)

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-346

STEP 19. Check harness between A-26 (terminal 
No. 2) fan controller connector and C-110 
(terminal No. 17) engine-ECU <M/T> connector or 
engine-A/T-ECU <A/T> connector.

NOTE: Before checking harness, check intermediate 
connector A-16, and repair if necessary.

• Check earthing line for short circuit.

Q: Is the check result normal?

YES : 

Replace fan motor and fan controller.

NO : 

Repair.

AK300999

1

2

3

AC

Harness side connector

Connector: A-26

 A-26 (GR)

AK305618AB

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

Connector: C-110

<L.H. drive vehicles>

<R.H. drive vehicles>

C-110 (GR)

C-110 (GR)

Harness side connector

 

 

 

 

 

 

 

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