Mitsubishi Eclipse. Manual - part 342

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-861

STEP 8. Measure the power supply voltage at fuel pump 
relay 2 harness side connector C-105.
(1) Disconnect the connector C-105 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 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 9.
NO :  Check harness connector C-111 at intermediate 

connector for damage, and repair or replace as 
required. Refer to, GROUP 00E, Harness Connector 
Inspection 

P.00E-2

. If intermediate connector is in 

good condition, repair harness wire between ignition 
switch connector C-87 (terminal No. 2) and fuel pump 
relay 2 connector C-105 (terminal No. 3) because of 
open circuit. Then confirm that the malfunction 
symptom is eliminated.

STEP 9. Check connector D-17 at fuel pump 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 confirm that the 

malfunction symptom is eliminated.

3

4

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

4

1

2

AK300746

CONNECTOR: C-105

AB

C-105

AK101347

1

2

3

4

C-105 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AY

AK300453

1

2

3

4

5

D-17 (GR)

AB

CONNECTOR: D-17

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-862

STEP 10. Check the fuel pump operation.
(1) Disconnect fuel pump connector D-17.

(2) Use jumper wires to connect fuel pump connector terminal 

No. 5 to the positive battery terminal and terminal No. 4 to 
the negative battery terminal.

• An operating sound of the fuel pump should be heard.

Q: Is the fuel pump operating properly?

YES : Go to Step 11.
NO :  Replace the fuel pump. Then confirm that the 

malfunction symptom is eliminated.

STEP 11. Check the continuity at fuel pump harness side 
connector D-17.
(1) Disconnect the connector D-17 and measure at the harness 

side.

(2) Check for the continuity between terminal No. 4 and 

ground.

• Should be less than 2 ohms.

Q: Is the continuity normal?

YES : Go to Step 12.
NO :  Repair harness wire damage between fuel pump 

connector D-17 (terminal No. 4) and ground because 
of open circuit or harness damage. Then confirm that 
the malfunction symptom is eliminated.

AK300453

1

2

3

4

5

D-17 (GR)

AB

CONNECTOR: D-17

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01439

FUEL PUMP SIDE
CONNECTOR

AB

1 2 3

4 5

AK300453

1

2

3

4

5

D-17 (GR)

AB

CONNECTOR: D-17

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01440AK

1

2

3

4

5

D-17 HARNESS CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-863

STEP 12. Check for open circuit and short circuit to 
ground and harness damage between fuel pump relay 2 
connector C-105 (terminal No. 4) and fuel pump connector 
D-17 (terminal No. 5).

NOTE: Check harness after checking intermediate connector 
C-101. If intermediate connectors are damaged, repair or 
replace them. After to GROUP 00E, Harness Connector 
Inspection 

P.00E-2

. Then check that the malfunction is elimi-

nated.
Q: Is the harness wire in good condition?

YES : Go to Step 13.
NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.

3

4

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

4

1

2

3

4

1

2

AK300746

CONNECTOR: C-105

AB

C-105

AK300453

1

2

3

4

5

D-17 (GR)

AB

CONNECTOR: D-17

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-864

STEP 13. Check connector C-49 at ECM <M/T> or 
connector C-50 at PCM <A/T> 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.

AK300413

1

14

4

19

5

22

6

17

8

15

9

18

7

20

16

2

21

23

26

24

25

3

10

11

12

13

CONNECTOR: C-49 <M/T>

C-49 (G)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300414

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

C-50 (GR)

CONNECTOR: C-50 <A/T>

AB

HARNESS CONNECTOR:
COMPONENT SIDE