Mitsubishi Montero Sport (2004+). Manual — part 351

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-817

STEP 5. Check harness connector C-60 at fuel pump relay
for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

STEP 6. Check the fuel pump relay
(1) Remove the fuel pump relay.

(2) Check for continuity between the fuel pump relay terminal

No. 2 and No. 4.

• There should be continuity (approximately 70 ohms)

(3) Use jumper wires to connect fuel pump relay terminal No. 4

to the positive battery terminal and terminal No. 2 to the
negative battery terminal.

(4) Check for continuity between the fuel pump relay terminal

No. 1 and No. 3 while connecting and disconnecting the
jumper wire at the negative battery terminal.

• Should be less than 2 ohms. (Negative battery terminal

connected)

• Should be open loop. (Negative battery terminal discon-

nected)

(5) Install the fuel pump relay.
Q: Is the resistance normal?

YES : Go to Step 7.
NO : Replace the fuel pump relay. Then confirm that the

malfunction symptom is eliminated

AK200046

2 1

3

4

CONNECTOR: C-60

AB

HARNESS
CONNECTOR:
COMPONENT
SIDE

C-60

AK200046

2 1

3

4

CONNECTOR: C-60

AB

HARNESS
CONNECTOR:
COMPONENT
SIDE

C-60

AK200198

1

2

3

4

AC

FUEL PUMP RELAY
SIDE CONNECTOR

AK200199

1

2

3

4

FUEL PUMP RELAY
SIDE CONNECTOR

AC

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-818

STEP 7. Measure the power supply voltage at fuel pump
relay connector C-60.
(1) Disconnect the connector C-60 and measure at the harness

side.

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

(3) Measure the voltage between terminals No. 3, No. 4 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 : Check harness connector D-08 at intermediate

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

P.00E-2

. If intermediate connector D-08 is

in good condition, repair harness wire between
ignition switch connector D-15 (terminal No. 2) and
fuel pump relay connector C-60 (terminals No. 3, No.
4). Then confirm that the malfunction symptom is
eliminated.

AK200046

2 1

3

4

CONNECTOR: C-60

AB

HARNESS
CONNECTOR:
COMPONENT
SIDE

C-60

2 1

3

4

AK200197

C-60 HARNESS
CONNECTOR:
COMPONENT SIDE

AK200197AE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-819

STEP 8. Check for open circuit and short circuit to ground
and harness damage between fuel pump relay connector
C-60 (terminal No. 1) and fuel pump connector E-26
(terminal No. 1).

NOTE: Check harness after checking intermediate connectors
C-16 and E-44. If intermediate connectors C-16 and E-44 are
damaged, repair or replace them. Refer to GROUP 00E, Har-
ness Connector Inspection

P.00E-2

. Then check that the mal-

function is eliminated.
Q: Is the harness wire in good condition?

YES : Go to Step 9.
NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

STEP 9. Check harness connector C-89 at PCM for
damage.
Q: Is the harness 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.

AK200046

2 1

3

4

CONNECTOR: C-60

AB

HARNESS
CONNECTOR:
COMPONENT
SIDE

C-60

AK200045

2 1

CONNECTOR: E-26

AB

HARNESS CONNECTOR:
COMPONENT SIDE

E-26

AK103914

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

AB

CONNECTOR: C-89

C-89(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-820

STEP 10. Measure the power supply voltage at PCM
connector C-89.
(1) Disconnect the connector C-89 and measure at the harness

side.

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

(3) Measure the voltage between terminal No. 21 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 : Replace the PCM. Then confirm that the malfunction

symptom is eliminated.

NO : Repair harness wire between fuel pump relay

connector C-60 (terminal No. 2) and PCM connector
C-89 (terminal No. 21). Then confirm that the
malfunction symptom is eliminated.

AK103914

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

AB

CONNECTOR: C-89

C-89(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK000409

AK000409 AQ

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

C-89 HARNESS
CONNECTOR:
COMPONENT SIDE