Mitsubishi Montero Sport (2004+). Manual — part 255

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-433

STEP 5. Check the injector.
(1) Disconnect the injector connector A-75 <No. 1 cylinder> or

A-72 <No. 2 cylinder> or A-74 <No. 3 cylinder> or A-71
<No. 4 cylinder> or A-73 <No. 5 cylinder> or A-70 <No. 6
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 [at 20

°C

(68

°F)]?

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 A-04 (terminal No. 8)
and injector connector A-75 (terminal No. 1)
and harness wire between injector connector
A-75 (terminal No. 2) and injector intermediate
connector A-04 (terminal No. 3) when
checking No. 1 cylinder.

b. Repair harness wire between injector

intermediate connector A-04 (terminal No. 8)
and injector connector A-72 (terminal No. 1)
and harness wire between injector connector
A-72 (terminal No. 2) and injector intermediate
connector A-04 (terminal No. 2) when
checking No. 2 cylinder.

c. Repair harness wire between injector

intermediate connector A-04 (terminal No. 8)
and injector connector A-74 (terminal No. 1)
and harness wire between injector connector
A-74 (terminal No. 2) and injector intermediate
connector A-04 (terminal No. 1) when
checking No. 3 cylinder.

d. Repair harness wire between injector

intermediate connector A-04 (terminal No. 8)
and injector connector A-71 (terminal No. 1)
and harness wire between injector connector
A-71 (terminal No. 2) and injector intermediate
connector A-04 (terminal No. 7) when
checking No. 4 cylinder.

AK200022

1

2

AB

CONNECTORS: A-70, A-71, A-72, A-73, A-74,
A-75

A-70(GR)

A-71(GR)

A-72(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

A-73(GR)

A-74(GR)

A-75(GR)

AK000456

1 2

INJECTOR SIDE
CONNECTOR

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-434

e. Repair harness wire between injector

intermediate connector A-04 (terminal No. 8)
and injector connector A-73 (terminal No. 1)
and harness wire between injector connector
A-73 (terminal No. 2) and injector intermediate
connector A-04 (terminal No. 6) when
checking No. 5 cylinder.

f. Repair harness wire between injector

intermediate connector A-04 (terminal No. 8)
and injector connector A-70 (terminal No. 1)
and harness wire between injector connector
A-70 (terminal No. 2) and injector intermediate
connector A-04 (terminal No. 5) when
checking No. 6 cylinder.

Then go to Step 12.

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

STEP 6. Measure the power supply voltage at injector
intermediate connector A-04.
(1) Disconnect the connector A-04 and measure at the female

connector side.

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

(3) Measure the voltage between terminal No. 8 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.

AK200014

7

2 1
6 5

4 3
8

CONNECTOR: A-04

AB

FEMALE SIDE
CONNECTOR

A-04(B)

2

8

5

3

4

1

7

AK000545

6

2

8

5

3

4

1

7

AK000545

6

INJECTOR INTERMEDIATE
FEMALE SIDE CONNECTOR

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-435

STEP 7. Check connector C-59 at MFI relay for damage.
Q: Is the connector in good condition?

YES : Check connector C-14 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 MFI relay
connector C-59 (terminal No. 1) and injector
intermediate connector A-04 (terminal No. 8) 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.

STEP 8. Check for harness damage between MFI relay
connector C-59 (terminal No. 1) and injector intermediate
connector A-04 (terminal No. 8).
Q: Is the harness wire in good condition?

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

AK200023

2 1

3

4

CONNECTOR: C-59

AB

C-59

HARNESS
CONNECTOR:
COMPONENT
SIDE

AK200023

2 1

3

4

CONNECTOR: C-59

AB

C-59

HARNESS
CONNECTOR:
COMPONENT
SIDE

AK200014

7

2 1
6 5

4 3
8

CONNECTOR: A-04

AB

FEMALE SIDE
CONNECTOR

A-04(B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-436

STEP 9. Check connector C-89 at PCM 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.

STEP 10. Check for open circuit and short circuit to
ground and harness damage between injector
intermediate connector and PCM connector.

a. Check the harness wire between intermediate connector

A-04 (terminal No. 3) and PCM connector C-89 (terminal
No. 1) when checking No. 1 cylinder.

b. Check the harness wire between intermediate connector

A-04 (terminal No. 2) and PCM connector C-89 (terminal
No. 9) when checking No. 2 cylinder.

c. Check the harness wire between intermediate connector

A-04 (terminal No. 1) and PCM connector C-89 (terminal
No. 24) when checking No. 3 cylinder.

d. Check the harness wire between intermediate connector

A-04 (terminal No.7) and PCM connector C-89 (terminal
No. 2) when checking No. 4 cylinder.

e. Check the harness wire between intermediate connector

A-04 (terminal No. 6) and PCM connector C-89 (terminal
No. 10) when checking No. 5 cylinder.

f. Check the harness wire between intermediate connector

A-04 (terminal No. 5) and PCM connector C-89 (terminal
No. 25) when checking No. 6 cylinder.

Q: Is the harness wire in good condition?

YES : Go to Step 11.
NO : Repair it. Then go to Step 12.

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

AK200014

7

2 1
6 5

4 3
8

CONNECTOR: A-04

AB

FEMALE SIDE
CONNECTOR

A-04(B)

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