Mitsubishi Montero (2004+). Manual — part 144
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-63
STEP 10. Check connector B-28 at the manifold absolute
pressure sensor and connector D-135 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 18.
AK200975
1
2
3
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-28
B-28(B)
AK200947
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-64
STEP 11. Check for short circuit to ground between
manifold absolute pressure sensor connector B-28
(terminal No. 3) and PCM connector D-135 (terminal No.
97).
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 18.
NO : Repair it. Then go to Step 18.
AK200975
1
2
3
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-28
B-28(B)
AK200947
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-65
STEP 12. Measure the ground voltage at manifold absolute
pressure sensor connector B-28 by backprobing.
(1) Do not disconnect the connector B-28.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 2 and ground by
backprobing.
• Voltage should be 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 15.
NO : Go to Step 13.
STEP 13. Check connector B-28 at the manifold absolute
pressure sensor and connector D-135 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 14.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 18.
AK200975
1
2
3
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-28
B-28(B)
3
2
1
AK203038
B-28 HARNESS
CONNECTOR:
HARNESS SIDE
AI
AK200975
1
2
3
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-28
B-28(B)
AK200947
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-66
STEP 14. Check for harness damage between manifold
absolute pressure sensor connector B-28 (terminal No. 2)
and PCM connector D-135 (terminal No. 96).
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 18.
NO : Repair it. Then go to Step 18.
STEP 15. Check connector B-28 at manifold absolute
pressure sensor for damage.
Q: Is the connector in good condition?
YES : Go to Step 16.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 18.
AK200975
1
2
3
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-28
B-28(B)
AK200947
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
CONNECTOR: D-135
HARNESS CONNECTOR:
COMPONENT SIDE
AB
PCM
D-135(GR)
AK200975
1
2
3
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-28
B-28(B)
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