Mitsubishi Colt Ralliart. Manual - part 738

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-277

Q: Is the check result normal?

YES : 

Check intermediate connector B-112, and 

repair if necessary. If the intermediate 
connector is normal, check and repair 
harness between B-127 (terminal No. 2) 
cooling fan control relay (HI) connector and 
A-08 (terminal No. 96) engine-ECU 
connector.

• Check signal line for short circuit.

NO : 

Repair or replace.

STEP 7. Connector check: A-20 cooling fan 
motor connector

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Repair or replace.

STEP 8. Perform resistance measurement at A-20 
cooling fan motor connector.

•

Disconnect connector and measure at harness side.

• Resistance between terminal No. 2, No. 4 and 

earth.

OK: Continuity (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Go to Step 9 .

STEP 9. Connector check: A-31 joint connector

Q: Is the check result normal?

YES : 

a.  Check and repair harness between 

A-20 (terminal No. 2) cooling fan motor 
connector and A-31 (terminal No. 2) joint 
connector.

b.  Check and repair harness between 

A-20 (terminal No. 4) cooling fan motor 
connector and A-31 (terminal No. 5) joint 
connector.

• Check earthing line for damage.

NO : 

Repair or replace.

AK402108

2 1

4 3

AC

Connector: A-20

Harness side connector

A-20

AK402108

2 1

4 3

AC

Connector: A-20

Harness side connector

A-20

AK402209

3

2 1

6

5 4

Connector: A-31

Harness side 
connector

A-31(G)

AC

AK402108

2 1

4 3

AC

Connector: A-20

Harness side connector

A-20

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-278

STEP 10. Connector check: B-114 cooling fan 
control relay (LO) connector

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Repair or replace.

STEP 11. Check harness between B-114 (terminal 
No. 4) cooling fan control relay (LO) connector 
and A-20 (terminal No. 1) cooling fan motor 
connector.

NOTE: Before checking harness, check intermediate 
connector B-109 and repair if necessary.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Repair.

AK402106

3

2

1

4

AC

Connector: B-114

J/B side 
connector

B-114

AK402106

3

2

1

4

AC

Connector: B-114

J/B side 
connector

B-114

AK402108

2 1

4 3

AC

Connector: A-20

Harness side connector

A-20

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-279

STEP 12. Connector check: B-127 cooling fan 
control relay (HI) connector

Q: Is the check result normal?

YES : 

Go to Step 13 .

NO : 

Repair or replace.

STEP 13. Check harness between B-127 (terminal 
No. 4) cooling fan control relay (HI) connector 
and A-20 (terminal No. 3) cooling fan motor 
connector.

NOTE: Before checking harness, check intermediate 
connector B-109 and repair if necessary.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 14 .

NO : 

Repair.

3

2

1

4

AK402107

J/B side 
connector

Connector: B-127
J/B (front side)

AC

B-127

3

2

1

4

AK402107

J/B side 
connector

Connector: B-127
J/B (front side)

AC

B-127

AK402108

2 1

4 3

AC

Connector: A-20

Harness side connector

A-20

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-280

STEP 14. Check harness between battery and 
B-114 (terminal No. 3) cooling fan control relay 
(LO) connector.

NOTE: Before checking harness, check intermediate 
connector B-108 and repair if necessary.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 15 .

NO : 

Repair.

STEP 15. Check harness between battery and 
B-127 (terminal No. 3) cooling fan control relay 
(HI) connector.

NOTE: Before checking harness, check intermediate 
connector B-108 and repair if necessary.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 16 .

NO : 

Repair.

STEP 16. Check the trouble symptom.

Q: Does trouble symptom recur?

YES : 

Replace engine-ECU.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

AK402106

3

2

1

4

AC

Connector: B-114

J/B side 
connector

B-114

3

2

1

4

AK402107

J/B side 
connector

Connector: B-127
J/B (front side)

AC

B-127

Main

Index

Group

TOC