Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 308

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-431

STEP 8. 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 9.
NO : Replace the faulty injector. Then confirm that the

malfunction symptom is eliminated.

STEP 9. 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 12.
NO : Go to Step 10.

AK000213AB

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

B-02 B-06 B-25

AK000559

2

1

INJECTOR SIDE
CONNECTOR

AB

AK000209AC

CONNECTOR:B-48

AK000447

1 2

3 4

INJECTOR
INTERMEDIATE
CONNECTOR

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-432

STEP 10. 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 9.

(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 11.
NO : Replace the injector. Then confirm that the

malfunction symptom is eliminated.

STEP 11. Check connector B-01 or B-05 or B-26 at right
bank injector for damage.
(1) Check the injector connector, which deviates from the

standard value at Step 9.

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

YES : Go to Step 13.
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

AK000559

2

1

INJECTOR SIDE
CONNECTOR

AB

AK000210AB

B-05 B-26

B-01

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

AK000209AC

CONNECTOR:B-48

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-433

STEP 13. Check connector B-02, B-06, B-25 at left bank
injector for damage.
Q: Is the 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 confirm that the

malfunction symptom is eliminated.

STEP 14. Check connector C-51 at ECM <M/T> or
connector C-52 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Go to Step 15.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

).Then confirm that the

malfunction symptom is eliminated.

AK000213AB

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

B-02 B-06 B-25

AK000225

CONNECTOR : C-51<M/T>, C-52<A/T>

C-52

C-51

PCM<A/T>

ECM<M/T>

AJ

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-434

STEP 15. Check for harness damage between injector
connector and PCM connector.

a. Check the harness wire between injector connector B-

01 terminal 2 and ECM connector C-51 terminal 1 <M/
T> or PCM connector C-52 terminal 1 <A/T> when
checking No.1 cylinder injector.

b. Check the harness wire between injector connector B-

02 terminal 2 and ECM connector C-51 terminal 9 <M/
T> or PCM connector C-52 terminal 9 <A/T> when
checking No.2 cylinder injector.

c. Check the harness wire between injector connector B-

05 terminal 2 and ECM connector C-51 terminal 24 <M/
T> or PCM connector C-52 terminal 24 <A/T> when
checking No.3 cylinder injector.

d. Check the harness wire between injector connector B-

06 terminal 2 and ECM connector C-51 terminal 2 <M/
T> or PCM connector C-52 terminal 2 <A/T> when
checking No.4 cylinder injector.

e. Check the harness wire between injector connector B-

26 terminal 2 and ECM connector C-51 terminal 10 <M/
T> or PCM connector C-52 terminal 10 <A/T> when
checking No.5 cylinder injector.

f. Check the harness wire between injector connector B-

25 terminal 2 and ECM connector C-51 terminal 25 <M/
T> or PCM connector C-52 terminal 25 <A/T> when
checking No.6 cylinder injector.

Q: Is the harness wire in good condition?

YES : Check the following items, and repair or replace the

defective items.

a. Check the ignition coil, spark plugs, spark plug

cables.

b. Check if the injectors are clogged.

c. Check compression pressure.

d. Check fuel lines for clogging.
e. Check if the foreign materials (water,

kerosene, etc.) got into fuel.

Then confirm that the malfunction symptom is

eliminated.

NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

INSPECTION PROCEDURE 7: Hard Starting

COMMENT

•

In cases such as the above, the cause is usually
either weak spark, improper air-fuel mixture or
low compression.

TROUBLESHOOTING HINTS (The most likely
causes for this case:)

•

Malfunction of the ignition system.

•

Malfunction of the injector system.

•

Poor fuel quality. (Contamination)

•

Poor compression.

AK000215

AK000215

B-01 B-05 B-26

B-02 B-06 B-25

AB

CONNECTORS : B-01, B-02, B-05, B-06,
B-25, B-26

AK000225

CONNECTOR : C-51<M/T>, C-52<A/T>

C-52

C-51

PCM<A/T>

ECM<M/T>

AJ