Mitsubishi Eclipse. Manual - part 493

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-515

STEP 5. Check the injector.
(1) Disconnect the injector connector B-01 <No. 1 cylinder> or 

B-05 <No. 3 cylinder> or B-26 <No. 5 cylinder>.

(2) Measure the resistance between injector side connector 

terminal No. 1 and No. 2.

Standard value: 13 

− 16 ohms [at 20°C (68°F)]

Q: Is the resistance between 13 and 16 ohms?

YES : Repair harness wire between injector intermediate 

connector and injector connector because of open 
circuit or short circuit to ground or harness 
damage.

a. Repair harness wire between injector 

intermediate connector B-48 (terminal No. 1) 
and injector connector B-01 (terminal No. 1) 
and harness wire between injector connector 
B-01 (terminal No. 2) and injector intermediate 
connector B-48 (terminal No. 2) when 
checking No. 1 cylinder.

b. Repair harness wire between injector 

intermediate connector B-48 (terminal No. 1) 
and injector connector B-05 (terminal No. 1) 
and harness wire between injector connector 
B-05 (terminal No. 2) and injector intermediate 
connector B-48 (terminal No. 3) when 
checking No. 3 cylinder.

c. Repair harness wire between injector 

intermediate connector B-48 (terminal No. 1) 
and injector connector B-26 (terminal No. 1) 
and harness wire between injector connector 
B-26 (terminal No. 2) and injector intermediate 
connector B-48 (terminal No. 4) when 
checking No. 5 cylinder.

Then go to Step 12.

NO :  Replace the injector. Then go to Step 12.

AK300752

1

2

CONNECTORS: B-01, B-05, B-26

AB

B-05 (GR) B-26 (GR)

B-01 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK000241

INJECTOR SIDE
CONNECTOR

1 2

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-516

STEP 6. Check the power supply voltage at injector 
intermediate connector B-48.
(1) Disconnect the connector B-48 and measure at the female 

connector side.

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

(3) Measure the voltage between terminal No. 1 and ground.

• Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts) 

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

STEP 7. Check connector A-18X at MFI relay for damage.
Q: Is the connector in good condition?

YES : Repair harness wire between MFI relay connector 

A-18X (terminal No. 4) and injector intermediate 
connector B-48 (terminal No. 1) because of open 
circuit or short circuit to ground. 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.

AK300085

CONNECTOR: B-48

AB

B-48 (B)

AK000271AB

2 1

4 3

INJECTOR
INTERMEDATE
CONNECTOR

AK300454

2

1

3

4

CONNECTOR: A-18X

AB

A-18X

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-517

STEP 8. Check for harness damage between MFI relay 
connector A-18X (terminal No. 4) and injector intermediate 
connector B-48 (terminal No. 1).
Q: Is the harness wire in good condition?

YES : Go to Step 9.
NO :  Repair it. Then go to Step 12.

AK300454

2

1

3

4

CONNECTOR: A-18X

AB

A-18X

HARNESS CONNECTOR:
COMPONENT SIDE

AK300751

1

2

3

4

CONNECTOR: B-48

AB

B-48 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-518

STEP 9. 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 10.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 12.

AK300458

2

3

4

5

6

7

8

9

11

12

13

14

15

16

17

18

19

20

30

21

22

23

24

25

26

27

28

29

31

32

33

34

35

1

10

CONNECTOR: C-52 <A/T>

C-52 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300443

2

3

4

5

6

7

8

9

11

12

13

14

15

16

17

18

19

20

30

21

22

23

24

25

26

27

28

29

31

32

33

34

35

1

10

CONNECTOR: C-51 <M/T>

C-51 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE