Mitsubishi Montero Sport (2004+). Manual - part 286

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-557

Q: Are the connectors in good condition?

YES : It can be assumed that this malfunction is intermittent. 

(Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-7

). Then go 

to Step 16 .

NO :  Repair or replace the damaged component. (Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

). Then go to Step 16 .

STEP 12. Measure the fuel tank differential pressure 
sensor ground voltage at PCM connector C-90 by 
backprobing.
(1) Do not disconnect PCM connector C-90.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 57 and ground by 

backprobing.

• The measured voltage should measure 0.5 volt or less.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage 0.5 volt or less?

YES : Go to Step 13 .
NO :  Go to Step 14 .

AC002614

CONNECTOR: E-28

FUEL TANK
DIFFERENTIAL
PRESSURE
SENSOR

AH

E-28 (B)

2 1

3

E-28 HARNESS SIDE 
CONNECTOR

PCM

60

46

66

57

45

44

64

55 56

65

62 63

52 53

5051

61

42

59

48

41
47
58

43
49

54

AC202313

C-90 (GR)

AC

CONNECTOR: C-90

C-90 (GR)

C-90 HARNESS SIDE CONNECTOR 

AC203263 AB

C-90 HARNESS CONNECTOR:
HARNESS SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-558

STEP 13. Check connectors E-44, C-16, C-71 at 
intermediate connector and C-90 at PCM and E-28 at fuel 
tank differential pressure sensor for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.

AC203242 AC

CONNECTOR: E-44

E-44

E-44 MALE SIDE CONNECTOR

20

19

7

16

6

17

15

5

14

18

8

4

11

3

12

2

9

1

10

13

AC203236 AC

CONNECTOR: C-16

C-16

22

2021

10

9

8

1718

6 7

19

1415

4 5

1112

1 2 3

13

16

C-16 MALE SIDE 
CONNECTOR

AC203241

CONNECTOR: C-71

AD

C-71

9 10

8

6 7

31 32

30

29

18 19 20 21

5

4

2

1

3

27

26

24

23

25

12 13 14 15 16 17

28

11
22
33

C-71 JOINT CONNECTOR

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-559

Q: Are the connectors and terminals in good condition?

YES : It can be assumed that this malfunction is intermittent. 

(Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-7

). Then go 

to Step 16 .

NO :  Repair or replace the damaged components. (Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

). Then go to Step 16 .

PCM

60

46

66

57

45

44

64

55 56

65

62 63

52 53

5051

61

42

59

48

41
47
58

43
49

54

AC202313

C-90 (GR)

AC

CONNECTOR: C-90

C-90 (GR)

C-90 HARNESS SIDE CONNECTOR 

AC002614

CONNECTOR: E-28

FUEL TANK
DIFFERENTIAL
PRESSURE
SENSOR

AH

E-28 (B)

2 1

3

E-28 HARNESS SIDE 
CONNECTOR

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-560

STEP 14. Check connector C-90 at PCM for loose, 
corroded or damaged terminals, for terminals pushed back 
in the connector.
Q: Are the connectors and terminals in good condition?

YES : Go to Step 15 .
NO :  Repair or replace the damaged components. (Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

). Then go to Step 16 .

PCM

60

46

66

57

45

44

64

55 56

65

62 63

52 53

5051

61

42

59

48

41
47
58

43
49

54

AC202313

C-90 (GR)

AC

CONNECTOR: C-90

C-90 (GR)

C-90 HARNESS SIDE CONNECTOR