Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 309

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-435

DIAGNOSIS

Required Special Tool:
MB991502: Scan Tool (MUT-II)

STEP 1. Check the battery positive voltage.
(1) Measure the battery positive voltage during cranking.

•

The voltage is 8 volts or more.

Q: Is the voltage normal?

YES : Go to Step 2.
NO : Refer to GROUP 54A, Battery-Battery Check (

P.54A-

5

).

STEP 2. Using scan tool MB991502, read the diagnostic
trouble code (DTC).

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the DTC is output?

YES : Refer to Diagnostic Trouble Code Chart (

P.13B-18

).

NO : Go to Step 3.

STEP 3. Using scan tool MB991502, check actuator test.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the actuator test. Refer to

Actuator Test Reference Table (

P.13B-529

).

a. Item 07: Fuel Pump.

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

Q: Is the actuator operating properly?

YES : Go to Step 4.
NO : Repair or Replace. Then confirm that the malfunction

symptom is eliminated.

STEP 4. Using scan tool MB991502, check data list.
(1) Turn the ignition switch the "ON" position.
(2) Check the following items in the data list. Refer to Data List

Reference Table (

P.13B-517

).

a. Item 21: Engine Coolant Temperature Sensor.

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

Q: Is the sensor operating properly?

YES : Go to Step 5.
NO : Repair or Replace. Then confirm that the malfunction

symptom is eliminated.

AKX01177

16 PIN

MB991502

AB

AKX01177

16 PIN

MB991502

AB

AKX01177

16 PIN

MB991502

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-436

STEP 5. Check the ignition timing.
(1) Check the ignition timing at cranking.

Standard value:5

°

BTDC

φ

3

°

Q: Is the ignition timing normal?

YES : Go to Step 6.
NO : Check that the crankshaft position sensor and timing

belt cover are in the correct position. Then confirm
that the malfunction symptom is eliminated.

STEP 6. Check the left bank injector.
(1) Disconnect the left bank injector connector B-02, B-06, B-

25.

(2) Measure the resistance between each injector side

connector terminals 1 and 2.

Standard value: 13

−

16 ohm [at 20

°

C (68

°

F)]

Q: Is the resistance standard value?

YES : Go to Step 7.
NO : Replace the faulty injector. Then confirm that the

malfunction symptom is eliminated.

AK000213AB

CONNECTORS : B-02, B-06, B-25

B-02 B-06 B-25

AK000559

2

1

INJECTOR SIDE
CONNECTOR

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-437

STEP 7. Check the right bank injector resistance at injector
intermediate connector B-48.
(1) Disconnect the injector intermediate connector B-48.
(2) Measure the resistance between each male connector side

terminal.

a. Measure the resistance between terminal 1 and 2 when

measuring No.1 cylinder injector.

b. Measure the resistance between terminal 1 and 3 when

measuring No.3 cylinder injector.

c. Measure the resistance between terminal 1 and 4 when

measuring No.5 cylinder injector.

Resistance should be between 13 and 16 ohm [at 20

°

C

(68

°

F)].

Q: Is the resistance normal?

YES : Go to Step 10.
NO : Go to Step 8.

STEP 8. Check the right bank injector.
(1) Remove the intake manifold.
(2) Disconnect the right bank injector connector, which

deviates from the standard value at Step 7.

(3) Measure the resistance between injector side connector

terminals 1 and 2.

Standard value: 13

−

16 ohm [at 20

°

C (68

°

F)]

Q: Is the resistance standard value?

YES : Go to Step 9.
NO : Replace the injector. Then confirm that the

malfunction symptom is eliminated.

AK000209AC

CONNECTOR:B-48

AK000447

1 2

3 4

INJECTOR
INTERMEDIATE
CONNECTOR

AB

AK000210AB

B-05 B-26

B-01

CONNECTORS : B-01, B-05, B-26

AK000559

2

1

INJECTOR SIDE
CONNECTOR

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-438

STEP 9. Check connector B-01 or B-05 or B-26 at right
bank injector for damage.
(1) Check the injector connector, which deviated from the

standard value listed in Step 7.

Q: Is the connector in good condition?

YES : Repair harness wire between injector intermediate

connector and right bank injector connector because
of harness damage. Then confirm that the
malfunction symptom is eliminated.

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

Connector Inspection (

P.00E-2

).Then confirm that the

malfunction symptom is eliminated.

STEP 10. Check connector B-48 at the injector
intermediate connector for damage.
Q: Is the connector in good condition?

YES : Go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

).Then confirm that the

malfunction symptom is eliminated.

STEP 11. Check connector B-02, B-06, B-25 at the left bank
injector for damage.
Q: Is the connector in good condition?

YES : Go to Step 12.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

).Then confirm that the

malfunction symptom is eliminated.

AK000210AB

B-05 B-26

B-01

CONNECTORS : B-01, B-05, B-26

AK000209AC

CONNECTOR:B-48

AK000213AB

CONNECTORS : B-02, B-06, B-25

B-02 B-06 B-25