Mitsubishi Colt Ralliart. Manual — part 58

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-186

FUNCTION

• The oil feeder control valve controls the phase

angle of the intake camshaft through the signal
from the engine-ECU <M/T> or engine-CVT-ECU
<CVT>.

TROUBLE JUDGMENT

Check Conditions

• Ignition switch is in "ON" position <M/T>.

• Oil feeder control valve operation: OFF (Ignition:

ON, during the idling and so on)

Judgment Criterion

• For 4 seconds or more, the voltage in the drive

terminal of the oil feeder control valve on the
engine-ECU <M/T> or engine-CVT-ECU <CVT>
is abnormal.

PROBABLE CAUSES

• Failed purge oil feeder control valve

• Open/short circuit in oil feeder control valve cir-

cuit or loose connector contact

• Failed engine-ECU <M/T> or engine-CVT-ECU

<CVT>

DIAGNOSIS PROCEDURE

STEP 1. Connector check: A-101 oil feeder
control valve connector

Q: Is the check result normal?

YES :

Go to Step 2 .

NO :

Repair or replace the connector.

STEP 2. Check oil feeder control valve.

• Check oil feeder control valve (Refer to

P.13A-365

).

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Replace oil control valve.

STEP 3. Perform voltage measurement at A-101
oil feeder control 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 5 .

NO :

Go to Step 4 .

AK402003

1

2

AC

Connector: A-101

A-101 Harness side
connector

A-101 (B)

AK402003

1

2

AC

Connector: A-101

A-101 Harness side
connector

A-101 (B)

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-187

STEP 4. Connector check: B-106 engine control
relay connector

Q: Is the check result normal?

YES :

Check intermediate connector A-17 and

B-112, and repair if necessary. If
intermediate connectors are normal, check
and repair harness between A-101 (terminal
No. 1) oil feeder control valve connector and
B-106 (terminal No. 4) engine control relay
connector.

• Check power line for open/short

circuit.

NO :

Repair or replace the connector.

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

• Disconnect connector, and measure at harness

side.

• Ignition switch: ON

• Voltage between terminal No. 52 and earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Go to Step 6 .

3

2

1

4

AK402060

B-106
J/B side
connector

B-106

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

AC

AK402003

1

2

AC

Connector: A-101

A-101 Harness side
connector

A-101 (B)

AK402745

6

4

2

5

3

1

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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

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-188

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

Q: Is the check result normal?

YES :

Check and repair harness between A-101

(terminal No. 2) oil feeder control valve
connector and A-114 (terminal No. 52)
engine-ECU connector or engine-CVT-ECU
connector.

• Check output line for open/short

circuit.

NO :

Repair or replace the connector.

STEP 7. Connector check: B-106 engine control
relay connector

Q: Is the check result normal?

YES :

Go to Step 8 .

NO :

Repair or replace the connector.

AK402745

6

4

2

5

3

1

9

7

8

10

11

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52

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61

62

63

64

65

66

L

AD

A-114

Connector:

A-114

Harness side connector

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

Battery

AK402003

1

2

AC

Connector: A-101

A-101 Harness side
connector

A-101 (B)

3

2

1

4

AK402060

B-106
J/B side
connector

B-106

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

AC

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-189

STEP 8. Check harness between A-101 (terminal
No. 1) oil feeder control 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 9 .

NO :

Repair the damaged harness wire.

STEP 9. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector

Q: Is the check result normal?

YES :

Go to Step 10 .

NO :

Repair or replace the connector.

AK402003

1

2

AC

Connector: A-101

A-101 Harness side
connector

A-101 (B)

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

7

8

10

11

12

13

14

15

16

17

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52

53

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61

62

63

64

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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