Mitsubishi Colt Ralliart. Manual — part 677
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-33
STEP 4. Connector check: B-106 engine control
relay connector
Q: Is the check result normal?
YES :
Check intermediate connector B-112, and
repair if necessary. If the intermediate
connector is normal, check and repair the
harness between A-34 (terminal No. 2) air
flow sensor connector and B-106 (terminal
No. 4) engine control relay connector.
• Check power supply line for
open/short circuit.
NO :
Repair or replace.
STEP 5. Perform resistance measurement at A-34
air flow sensor connector.
• Disconnect connector and measure at harness
side.
• Resistance between terminal No. 4 and earth.
OK: Continuity (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Go to Step 6 .
STEP 6. Connector check: A-08 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Repair or replace.
3
2
1
4
AK402084
J/B side
connector
B-106
Connector: B-106
J/B (front side)
AC
AK402083
2
1
3
4
Connector: A-34
Harness side
connector
A-34 (GR)
AC
AK402083
2
1
3
4
Connector: A-34
Harness side
connector
A-34 (GR)
AC
AK402725
77
78
79
80
81
82
83
84
92
93
94
95
96
97
98
99
85
86
87
88
89
90
91
100
101
102
103
104
105
106
115
116
117
118
119
120
121
107
108
109
110
111
112
113
114
130
131
132
133
134
135
136
122
123
124
125
126
127
128
129
72 71
74 73
76 75
R
AI
A-08
Connector:
A-08
A-08 Special tool power plant ECU check
harness
Engine-ECU
Battery
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-34
STEP 7. Check harness between A-34 (terminal
No. 4) air flow sensor connector and A-08
(terminal No. 102) engine-ECU connector.
• Check earthing line for open circuit and damage.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair.
STEP 8. M.U.T.-III data list
• Refer to Data List Reference Table
.
a. Item 12: Air flow sensor
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to Group 00
−
How to Use Troubleshooting/Inspection
Service Points
− How to Cope with
Intermittent Malfunctions
).
NO :
Replace engine-ECU
STEP 9. Connector check: A-08 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Repair or replace.
AK402083
2
1
3
4
Connector: A-34
Harness side
connector
A-34 (GR)
AC
AK402725
77
78
79
80
81
82
83
84
92
93
94
95
96
97
98
99
85
86
87
88
89
90
91
100
101
102
103
104
105
106
115
116
117
118
119
120
121
107
108
109
110
111
112
113
114
130
131
132
133
134
135
136
122
123
124
125
126
127
128
129
72 71
74 73
76 75
R
AI
A-08
Connector:
A-08
A-08 Special tool power plant ECU check
harness
Engine-ECU
Battery
AK402725
77
78
79
80
81
82
83
84
92
93
94
95
96
97
98
99
85
86
87
88
89
90
91
100
101
102
103
104
105
106
115
116
117
118
119
120
121
107
108
109
110
111
112
113
114
130
131
132
133
134
135
136
122
123
124
125
126
127
128
129
72 71
74 73
76 75
R
AI
A-08
Connector:
A-08
A-08 Special tool power plant ECU check
harness
Engine-ECU
Battery
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-35
STEP 10. Check harness between A-34 (terminal
No. 3) air flow sensor connector and A-08
(terminal No. 90) engine-ECU connector.
• Check output line for open/short circuit and dam-
age.
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Repair.
STEP 11. Connector check: B-106 engine control
relay connector
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Repair or replace.
AK402083
2
1
3
4
Connector: A-34
Harness side
connector
A-34 (GR)
AC
AK402725
77
78
79
80
81
82
83
84
92
93
94
95
96
97
98
99
85
86
87
88
89
90
91
100
101
102
103
104
105
106
115
116
117
118
119
120
121
107
108
109
110
111
112
113
114
130
131
132
133
134
135
136
122
123
124
125
126
127
128
129
72 71
74 73
76 75
R
AI
A-08
Connector:
A-08
A-08 Special tool power plant ECU check
harness
Engine-ECU
Battery
3
2
1
4
AK402084
J/B side
connector
B-106
Connector: B-106
J/B (front side)
AC
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-36
STEP 12. Check harness between A-34 (terminal
No. 2) air flow sensor connector and B-106
(terminal No. 4) engine control relay connector.
NOTE: Before checking harness, check intermediate
connector B-112, and repair if necessary.
• Check power supply line for damage.
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Repair.
STEP 13. M.U.T.-III data list
• Refer to Data List Reference Table
.
a. Item 12: Air flow sensor
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to Group 00
−
How to Use Troubleshooting/Inspection
Service Points
− How to Cope with
Intermittent Malfunctions
).
NO :
Go to Step 14 .
STEP 14. M.U.T.-III diagnosis code
• Reconfirmation of diagnosis code after air flow
sensor replacement
Q: Is the diagnosis code output?
YES :
Replace engine-ECU.
NO :
Check end.
AK402083
2
1
3
4
Connector: A-34
Harness side
connector
A-34 (GR)
AC
3
2
1
4
AK402084
J/B side
connector
B-106
Connector: B-106
J/B (front side)
AC
Main
Index
Group
TOC
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