Mitsubishi Colt Ralliart. Manual - part 699

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-121

STEP 4. Perform voltage measurement at A-137 
waste gate solenoid valve connector.

• Disconnect connector and measure at harness 

side.

• Ignition switch: ON

• 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 .

STEP 5. Connector check: B-106 engine control 
relay connector

Q: Is the check result normal?

YES : 

Check intermediate connectors A-17 and 

B-112, and repair if necessary. If 
intermediate connectors are normal, check 
and repair harness between A-137 (terminal 
No. 1) waste gate solenoid valve connector 
and B-106 (terminal No. 4) engine control 
relay connector.

• Check power supply line for 

open/short circuit.

NO : 

Repair or replace.

AK402121

1

2

AC

Connector: A-137

Harness side 
connector

A-137(G)

3

2

1

4

AK402084

J/B side 
connector

B-106

Connector: B-106
J/B (front side)

AC

AK402121

1

2

AC

Connector: A-137

Harness side 
connector

A-137(G)

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-122

STEP 6. Perform voltage measurement at A-114 
engine-ECU connector.

• Disconnect connector and measure at harness 

side.

• Ignition switch: ON

• Voltage between terminal No. 36 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Go to Step 7 .

STEP 7. Connector check: A-114 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check and repair harness between A-137 

(terminal No. 2) waste gate solenoid valve 
connector and A-114 (terminal No. 36) 
engine-ECU connector.

• Check output line for open/short 

circuit.

NO : 

Repair or replace.

AK402745

6

4

2

5

3

1

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L

AF

A-114

Connector: 

A-114

Harness side connector

Engine-ECU

Battery

AK402745

6

4

2

5

3

1

9

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L

AF

A-114

Connector: 

A-114

Harness side connector

Engine-ECU

Battery

AK402121

1

2

AC

Connector: A-137

Harness side 
connector

A-137(G)

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-123

STEP 8. Connector check: A-114 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair or replace.

STEP 9. Check harness between A-137 (terminal 
No. 2) waste gate solenoid valve connector and 
A-114 (terminal No. 36) engine-ECU connector.

• Check output line for damage.

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Repair.

AK402745

6

4

2

5

3

1

9

7

8

10

11

12

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61

62

63

64

65

66

L

AF

A-114

Connector: 

A-114

Harness side connector

Engine-ECU

Battery

AK402121

1

2

AC

Connector: A-137

Harness side 
connector

A-137(G)

AK402745

6

4

2

5

3

1

9

7

8

10

11

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65

66

L

AF

A-114

Connector: 

A-114

Harness side connector

Engine-ECU

Battery

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-124

STEP 10. Check harness between A-137 (terminal 
No. 1) waste gate solenoid valve connector and 
B-106 (terminal No. 4) engine control relay 
connector.

NOTE: Before checking harness, check intermediate 
connectors A-17 and B-112, and repair if necessary.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Repair.

STEP 11. M.U.T.-III actuator test

• Item 12: Waste gate solenoid valve

OK: Operating sound can be heard and the 
valve vibrates.

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use Troubleshooting/Inspection 

Service Points 

− How to Cope with 

Intermittent Malfunctions 

P.00-13

).

NO : 

Replace engine-ECU.

AK402121

1

2

AC

Connector: A-137

Harness side 
connector

A-137(G)

3

2

1

4

AK402084

J/B side 
connector

B-106

Connector: B-106
J/B (front side)

AC

Main

Index

Group

TOC