Mitsubishi 380. Manual — part 503

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-104

STEP 4. Check for short circuit to ground between
manifold absolute pressure sensor connector B-02
(terminal No. 3) and ENGINE-ECU connector B-20 (terminal
No. 25).
Q: Is the harness wire in good condition?

YES : Go to Step 11.
NO : Repair it. Then go to Step 12.

STEP 7. Check harness connector B-02 at the manifold
absolute pressure sensor for damage.
Q: Is the connector in good condition?

YES : Repair harness wire between manifold absolute

pressure sensor connector B-02 (terminal No. 3) and
ENGINE-ECU connector B-20 (terminal No. 25)
because of open circuit. Then go to Step 12.

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

Connector Inspection

P.00E-2

. Then go to Step 12.

1

2

3

CONNECTOR: B-02

03DB223A

MANIFOLD

ABSOLUTE

PRESSURE

SENSOR

INTAKE

MANIFOLD

B-02 (B)

HARNESS

CONNECTOR:

COMPONENT SIDE

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

1

2

3

CONNECTOR: B-02

03DB223A

MANIFOLD

ABSOLUTE

PRESSURE

SENSOR

INTAKE

MANIFOLD

B-02 (B)

HARNESS

CONNECTOR:

COMPONENT SIDE

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-105

STEP 8. Check harness connector B-02 at the manifold
absolute pressure sensor and connector B-20 at
ENGINE-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 12.

1

2

3

CONNECTOR: B-02

03DB223A

MANIFOLD

ABSOLUTE

PRESSURE

SENSOR

INTAKE

MANIFOLD

B-02 (B)

HARNESS

CONNECTOR:

COMPONENT SIDE

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-106

STEP 9. Measure the sensor output voltage at
ENGINE-ECU connector B-20 by using ECU check
harness special tool MB992044.
(1) Disconnect the all ENGINE-ECU connectors and connect

ECU check harness special tool MB992044 between the
separated connectors.

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

(3) Measure the voltage between terminal No. 41 of

ENGINE-ECU check harness and ground.

• When altitude is 0 m, voltage should be 4.01 to 4.15

volts.

• When altitude is 600 m, voltage should be 3.76 to 3.92

volts.

• When altitude is 1,200 m, voltage should be 3.45 to 3.62

volts.

• When altitude is 1,800 m, voltage should be 3.2 to 3.3

volts.

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

Q: Is the measured voltage correct?

YES : Go to Step 11.
NO : Go to Step 10.

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

03DB224A

B-20 HARNESS

CONNECTOR

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-107

STEP 10. Check for open or short circuit to ground
between manifold absolute pressure sensor connector
B-02 (terminal No. 1) and ENGINE-ECU connector B-20
(terminal No. 41).
Q: Is the harness wire in good condition?

YES : Replace the manifold absolute pressure sensor. Then

go to Step 12.

NO : Repair it. Then go to Step 12.

1

2

3

CONNECTOR: B-02

03DB223A

MANIFOLD

ABSOLUTE

PRESSURE

SENSOR

INTAKE

MANIFOLD

B-02 (B)

HARNESS

CONNECTOR:

COMPONENT SIDE

16DB400A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER