Mitsubishi Colt Ralliart. Manual - part 26

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-58

STEP 5. Check throttle body (throttle valve 
portion) for contamination. 

Q: Is the check result normal?

YES : 

 Go to Step 6 .

NO : 

Clean throttle body (throttle valve portion) 
(Refer to 

P.13A-355

).

STEP 6. Connector check: A-122 oxygen sensor 
(front) connector, A-114 engine-ECU connector 
or engine-CVT-ECU connector.

Q: Is the check result normal?

YES : 

 Go to Step 7 .

NO : 

Repair or replace the connector.

STEP 7. Check oxygen sensor (front) itself.

• Check oxygen sensor (front) itself (Refer to 

P.13A-362

).

Q: Is the check result normal?

YES : 

 Go to Step 8 .

NO : 

Replace the oxygen sensor (front).

STEP 8. Check harness between A-122 (terminal 
No. 1) oxygen sensor (front) connector and A-114 
(terminal No. 34) engine-ECU connector or 
engine-CVT-ECU connector.

• Check output line for damage.

Q: Is the check result normal?

YES : 

 Go to Step 9 .

NO : 

Repair the damaged harness wire.

AK402012

2 1
4 3

Connector: A-122

A-122 (G)

AC

Oxygen sensor (front)

A-122 Harness side

connector

AK402745

6

4

2

5

3

1

9

7

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L

AD

A-114

Connector: 

A-114

Harness side connector

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Battery

AK402012

2 1
4 3

Connector: A-122

A-122 (G)

AC

Oxygen sensor (front)

A-122 Harness side

connector

AK402745

6

4

2

5

3

1

9

7

8

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L

AD

A-114

Connector: 

A-114

Harness side connector

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Battery

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-59

STEP 9. Connector check: Injector connector

a. A-102 (No. 1 injector connector)
b. A-103 (No. 2 injector connector)

c. A-104 (No. 3 injector connector)

d. A-105 (No. 4 injector connector)

Q: Is the check result normal?

YES : 

 Go to Step 10 .

NO : 

Repair or replace the connector.

STEP 10. Check injector itself.

• Check Injector itself (Refer to 

P.13A-364

).

Q: Is the check result normal?

YES : 

 Go to Step 11 .

NO : 

Replace the injector.

STEP 11. Connector check: B-106 engine control 
relay connector and A-114 engine-ECU 
connector or engine-CVT-ECU connector.

Q: Is the check result normal?

YES : 

 Go to Step 12 .

NO : 

Repair or replace the connector.

AK503594

M

1

2

A-104 (G)

A-103 (G)

A-102 (G)

A-105 (G)

Connectors: A-102, A-103, A-104, A-105

Harness side
connector

AB

3

2

1

4

AK402060

B-106
J/B side 
connector

B-106

Connector: B-106
J/B (front side)

AC

AK402745

6

4

2

5

3

1

9

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61

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63

64

65

66

L

AD

A-114

Connector: 

A-114

Harness side connector

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Battery

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-60

STEP 12. Check harness between B-106 engine 
control relay connector and injector connector.

a. Check harness between B-106 (terminal No. 4) 

engine control relay connector and A-102 (termi-
nal No. 1) No. 1 injector connector.

b. Check harness between B-106 (terminal No. 4) 

engine control relay connector and A-103 (termi-
nal No. 1) No. 2 injector connector.

c. Check harness between B-106 (terminal No. 4) 

engine control relay connector and A-104 (termi-
nal No. 1) No. 3 injector connector.

d. Check harness between B-106 (terminal No. 4) 

engine control relay connector and A-105 (termi-
nal No. 1) No. 4 injector connector.

NOTE: Before checking harness, check intermediate 

connector A-17 and B-112, repair if necessary.

• Check power supply line for damage.

Q: Are the check results normal?

YES : 

 Go to Step 13 .

NO : 

Repair the damaged harness wire.

3

2

1

4

AK402060

B-106
J/B side 
connector

B-106

Connector: B-106
J/B (front side)

AC

AK503594

M

1

2

A-104 (G)

A-103 (G)

A-102 (G)

A-105 (G)

Connectors: A-102, A-103, A-104, A-105

Harness side
connector

AB

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-61

STEP 13. Check harness between injector 
connector and A-114 engine-ECU connector or 
engine-CVT-ECU connector.

a. Check harness between A-102 (terminal No. 2) 

No. 1 injector connector and A-114 (terminal No. 
8) engine-ECU connector or engine-CVT-ECU 
connector.

b. Check harness between A-103 (terminal No. 2) 

No. 2 injector connector and A-114 (terminal No. 
9) engine-ECU connector or engine-CVT-ECU 
connector.

c. Check harness between A-104 (terminal No. 2) 

No. 3 injector connector and A-114 (terminal No. 
23) engine-ECU connector or engine-CVT-ECU 
connector.

d. Check harness between A-105 (terminal No. 2) 

No. 4 injector connector and A-114 (terminal No. 
24) engine-ECU connector or engine-CVT-ECU 
connector.

• Check earthing line for damage.

Q: Are the check results normal?

YES : 

 Go to Step 14 .

NO : 

Repair the damaged harness wire.

STEP 14. Fuel pressure measurement.

• Fuel pressure measurement (Refer to Fuel Pres-

sure Test 

P.13A-355

).

Q: Is the check result normal?

YES : 

Replace the engine-ECU <M/T> or 

engine-CVT-ECU <CVT>.

NO : 

Repair the fuel pressure.

AK503594

M

1

2

A-104 (G)

A-103 (G)

A-102 (G)

A-105 (G)

Connectors: A-102, A-103, A-104, A-105

Harness side
connector

AB

AK402745

6

4

2

5

3

1

9

7

8

10

11

12

13

14

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66

L

AD

A-114

Connector: 

A-114

Harness side connector

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Battery

Main

Index

Group

TOC