Mitsubishi Colt Ralliart. Manual — part 707

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-153

STEP 3. 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 them if necessary. If the
intermediate connectors are normal, check
and repair the harness between A-110
(terminal No. 3) camshaft position sensor
connector and B-106 (terminal No. 4)
engine control relay connector.

• Check power supply line for

open/short circuit.

NO :

Repair or replace.

STEP 4. Perform voltage measurement at A-110
camshaft position sensor connector.

• Disconnect connector and measure at harness

side.

• Ignition switch: ON

• Voltage between terminal No. 2 and earth.

OK: 4.9

− 5.1 V

Q: Is the check result normal?

YES :

Go to Step 10.

NO :

Go to Step 5.

3

2

1

4

AK402084

J/B side
connector

B-106

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

AC

AK402097

1

2

3

AC

Connector: A-110

Harness side
connector

A-110(B)

AK402097

1

2

3

AC

Connector: A-110

Harness side
connector

A-110(B)

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-154

STEP 5. Perform voltage measurement at A-114
engine-ECU connector.

• Disconnect engine-ECU connector, and connect

special tool power plant ECU check harness
(MB991987), and then measure the voltage at
the check connector.

• Disconnect the A-110 camshaft position sensor

connector.

• Ignition switch: ON

• Voltage between terminal No. 12 and earth.

OK: 4.9

− 5.1 V

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Go to Step 7.

STEP 6. Connector check: A-114 engine-ECU
connector

Q: Is the check result normal?

YES :

Check and repair the harness between

A-110 (terminal No. 2) camshaft position
sensor connector and A-114 (terminal No.
12) engine-ECU connector.

• Check output line for open circuit.

NO :

Repair or replace.

AK402745

6

4

2

5

3

1

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66

L

AF

A-114

Connector:

A-114

Harness side connector

Engine-ECU

Battery

AK402097

1

2

3

AC

Connector: A-110

Harness side
connector

A-110(B)

AK402745

6

4

2

5

3

1

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66

L

AF

A-114

Connector:

A-114

Harness side connector

Engine-ECU

Battery

AK402097

1

2

3

AC

Connector: A-110

Harness side
connector

A-110(B)

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-155

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

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Repair or replace.

STEP 8. Check harness between A-110 (terminal
No. 2) camshaft position sensor connector and
A-114 (terminal No. 12) engine-ECU connector.

• Check the output line for short circuit.

Q: Is the check result normal?

YES :

Go to Step 9.

NO :

Repair.

STEP 9. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the diagnosis code output?

YES :

Replace the 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

).

AK402745

6

4

2

5

3

1

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66

L

AF

A-114

Connector:

A-114

Harness side connector

Engine-ECU

Battery

AK402097

1

2

3

AC

Connector: A-110

Harness side
connector

A-110(B)

AK402745

6

4

2

5

3

1

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L

AF

A-114

Connector:

A-114

Harness side connector

Engine-ECU

Battery

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-156

STEP 10. Perform resistance measurement at
A-110 camshaft position sensor connector.

• Disconnect connector and measure at harness

side.

• Voltage between terminal No. 1 and earth.

OK: Continuity (2

Ω or less)

Q: Is the check result normal?

YES :

Go to Step 13.

NO :

Go to Step 11.

STEP 11. Connector check: A-114 engine-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 12.

NO :

Repair or replace.

STEP 12. Check harness between A-110 (terminal
No. 1) camshaft position sensor connector and
A-114 (terminal No. 27) engine-ECU connector.

• Check earthing line for open circuit and damage.

Q: Is the check result normal?

YES :

Go to Step 9.

NO :

Repair.

AK402097

1

2

3

AC

Connector: A-110

Harness side
connector

A-110(B)

AK402745

6

4

2

5

3

1

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L

AF

A-114

Connector:

A-114

Harness side connector

Engine-ECU

Battery

AK402097

1

2

3

AC

Connector: A-110

Harness side
connector

A-110(B)

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

Main

Index

Group

TOC