Mitsubishi 380. Manual — part 571

MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MPI)

13A-376

STEP 6. Measure the sensor supply voltage at ECU
connector B-20 by using engine ECU check harness
special tool MB992044.
(1) Disconnect the all ECU connectors and connect engine

ECU check harness special tool MB992044 between the
separated connectors.

(2) Disconnect the camshaft position sensor connector B-106.
(3) Turn the ignition switch to the "ON" position.

(4) Measure the voltage between terminal No. 38 and ground.

• Voltage should be between 4.9 and 5.1 volts.

(5) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the measured voltage between 4.9 and 5.1 volts?

YES : Go to Step 7.
NO : Go to Step 8.

STEP 7. Check harness connector B-20 at ECU for
damage.
Q: Is the harness connector in good condition?

YES : Repair harness wire between camshaft position

sensor connector B-106 (terminal No. 2) and ECU
connector B-22 (terminal No. 38) because of open
circuit. Then go to Step 20.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 20.

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

03DB191A

B-20 HARNESS

CONNECTOR

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MPI)

13A-377

STEP 8. Check harness connector B-20 at ECU for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 20.

STEP 9. Check for short circuit to ground between
camshaft position sensor connector B-106 (terminal No. 2)
and ECU connector B-20 (terminal No. 38).
Q: Is the harness wire in good condition?

YES : Then go to Step 10.
NO : Repair it. Then go to Step 20.

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

1

2

3

AK303130

HARNESS

CONNECTOR:

COMPONENT SIDE

AB

CAMSHAFT POSITION

SENSOR

B-106 (B)

CONNECTOR: B-106

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MPI)

13A-378

STEP 10. Measure the power supply voltage at camshaft
position sensor connector B-106.
(1) Disconnect the connector B-106 and measure at the

harness side.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 3 and ground.

• Voltage should be approximately 4.9 - 5.1 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the voltage approximately between 4.9 - 5.1volts?

YES : Go to Step 12.
NO : Go to Step 11.

STEP 11. Check ECU harness connector B-20 for damage.
Q: Is the harness connector in good condition?

YES : Repair harness wire between ECU connector B-20

(terminal No. 25) and camshaft position sensor
connector B-106 (terminal No. 01) because of open
circuit or short circuit to ground. Then go to Step 20.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 20.

1

2

3

AK303130

HARNESS

CONNECTOR:

COMPONENT SIDE

AB

CAMSHAFT POSITION

SENSOR

B-106 (B)

CONNECTOR: B-106

AK303134

B-106 HARNESS

CONNECTOR:

COMPONENT SIDE

3 2 1

AB

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MPI)

13A-379

STEP 12. Check the continuity at camshaft position sensor
connector B-106.
(1) Disconnect the connector B-106 and measure at the

harness side.

(2) Check for the continuity between terminal No. 03 and

ground.

• Should be less than 2 ohms.

Q: Does continuity exist?

YES : Go to Step 15.
NO : Go to Step 13.

STEP 13. Check harness connector B-20 at ECU for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 14.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 20.

1

2

3

AK303130

HARNESS

CONNECTOR:

COMPONENT SIDE

AB

CAMSHAFT POSITION

SENSOR

B-106 (B)

CONNECTOR: B-106

03DB192A

B-106 HARNESS

CONNECTOR:

COMPONENT SIDE

1

2

3

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER