Mitsubishi Montero Sport (2004+). Manual — part 295
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-593
STEP 6. Check the harness wire for open circuit between
PCM connector C-90 terminal 57 and fuel tank differential
pressure sensor connector E-28 terminal 2 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
). Then go
to Step 16 .
NO : Repair or replace the harness wire. Then go to 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-594
STEP 7. Measure the output circuit voltage at PCM
connector C-91 by backprobing.
(1) Do not disconnect PCM connector C-91.
(2) Disconnect hose E from the evaporative emission canister
side, and plug the hose.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage between terminal 92 and ground by
backprobing.
• When the fuel cap is removed, the voltage should mea-
sure between 2.0 and 3.0 volts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
(6) Disconnect the evaporative emission system pressure
pump, and reinstall the fuel cap.
(7) Connect hose E to the canister.
Q: Is the measured voltage between 2.0 and 3.0 volts?
YES : Go to Step 8 .
NO : Go to Step 9 .
PCM
89
98
88
97
76 77
87
86
83
94
84
95
85
96
80
92
81
93
79
78
90 91
82
74
71 72 73
75
AC202312
CONNECTORS: C-91
AC
C-91 (GR)
C-91 HARNESS SIDE CONNECTOR
AC005140
HOSE E
AC
AC005153 AC
C-91 HARNESS CONNECTOR:
HARNESS SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-595
STEP 8. Check connectors C-91 at PCM and E-28 at fuel
tank differential pressure sensor 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 15 .
NO : Repair or replace the damaged component. (Refer to
GROUP 00E, Harness Connector Inspection
PCM
89
98
88
97
76 77
87
86
83
94
84
95
85
96
80
92
81
93
79
78
90 91
82
74
71 72 73
75
AC202312
CONNECTORS: C-91
AC
C-91 (GR)
C-91 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-596
STEP 9. Check connectors E-44, C-16, at intermediate
connector and C-91 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
PCM
89
98
88
97
76 77
87
86
83
94
84
95
85
96
80
92
81
93
79
78
90 91
82
74
71 72 73
75
AC202312
CONNECTORS: C-91
AC
C-91 (GR)
C-91 HARNESS SIDE CONNECTOR
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