Mitsubishi Montero (2004+). Manual - part 278

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-599

STEP 4. Measure the 5-volt reference signal at PCM 
connector D-135 by backprobing.
(1) Do not disconnect PCM connector D-135.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between PCM connector D-135 

terminal 97 and ground by backprobing.

• The voltage should measure between 4.9 and 5.1 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.9 and 5.1 volts?

YES : Go to Step 6.
NO :  Go to Step 5.

STEP 5. Check PCM connector D-135 for loose, corroded 
or damaged terminals, or terminals pushed back in the 
connector.
Q: Are the connector and terminals in good condition?

YES : Go to Step 14.
NO :  Repair or replace the faulty component. (Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

). Go to Step 15.

AC203993

CONNECTOR: D-135

AC

D-135 (GR)

PCM

94

93

95

96 97 98 99 100

92

91

101 102 103

104

105 106

107 108 109

110 111 112

113 114

115 116 117

118 119 120

AC204160 AB

D-135 HARNESS CONNECTOR:
HARNESS SIDE

AC203997

CONNECTOR: D-135

AB

D-135 (GR)

PCM

D-135 HARNESS CONNECTOR:
HARNESS SIDE

94

93

95

96 97 98 99 100

92

91

101 102103

104

105 106

107 108 109

110 111 112

113 114

115 116 117

118 119 120

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-600

STEP 6. Check intermediate connectors D-112, E-111 and 
F-07, and fuel tank differential pressure sensor connector 
G-05 for loose, corroded or damaged terminals, or 
terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?

YES : Go to Step 7.
NO :  Repair or replace the faulty component. (Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

). Go to Step 15.

AC203998

CONNECTOR: D-112

AC

D-112

D-112 HARNESS
CONNECTOR:
COMPONENT SIDE

38

28

16

33

22

10

31

19

7

1

18

30

29

17

5

6

21

20

32

8

2

9

25

13

3

24

23

34 35

11 12

27

26

36 37

14

4

15

AC203999

CONNECTOR: E-111

AC

E-111

E-111 HARNESS
CONNECTOR:
COMPONENT SIDE

38

12 13

11

26

14

1

20

6

23 24 25

37

31

36

30

10

9

21 22

35

8

7

34

17

29

18 19

5

4

15 16

33

28

32

27

3

2

AC204000

CONNECTOR: F-07

AC

F-07 (B)

F-07 HARNESS
CONNECTOR:
COMPONENT SIDE

8

4

3

2

1
5 6 7

ACX00218

CONNECTOR : G-05

AR

G-05 (B)

SECOND SEAT UNDER
SERVICE HOLE

G-05 HARNESS
CONNECTOR:
COMPONENT SIDE

1

2

3

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-601

STEP 7. Check the harness wires between PCM connector 
D-135 terminal 97 and fuel tank differential pressure 
sensor connector G-05 terminal 3 for damage. 
Q: Are the harness wires 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.00-6

). Go to 

Step 15.

NO :  Repair the damaged harness wires. Go to Step 15.

AC203997

CONNECTOR: D-135

AB

D-135 (GR)

PCM

D-135 HARNESS CONNECTOR:
HARNESS SIDE

94

93

95

96 97 98 99 100

92

91

101 102103

104

105 106

107 108 109

110 111 112

113 114

115 116 117

118 119 120

ACX00218

CONNECTOR : G-05

AR

G-05 (B)

SECOND SEAT UNDER
SERVICE HOLE

G-05 HARNESS
CONNECTOR:
COMPONENT SIDE

1

2

3

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-602

STEP 8. Check PCM connector D-135, intermediate 
connectors D-112, E-113 and F-07, and fuel tank differential 
pressure sensor connector G-05 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.

AC203997

CONNECTOR: D-135

AB

D-135 (GR)

PCM

D-135 HARNESS CONNECTOR:
HARNESS SIDE

94

93

95

96 97 98 99 100

92

91

101 102103

104

105 106

107 108 109

110 111 112

113 114

115 116 117

118 119 120

AC203998

CONNECTOR: D-112

AC

D-112

D-112 HARNESS
CONNECTOR:
COMPONENT SIDE

38

28

16

33

22

10

31

19

7

1

18

30

29

17

5

6

21

20

32

8

2

9

25

13

3

24

23

34 35

11 12

27

26

36 37

14

4

15

AC203999

CONNECTOR: E-113

AD

E-113

E-113 HARNESS
CONNECTOR:
COMPONENT SIDE

11

2

1

6 7

9

8

10

14

4

3

1213

5