Mitsubishi Colt Ralliart. Manual — part 679
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-41
STEP 9. Perform voltage measurement at A-08
engine-ECU connector.
• Disconnect engine-ECU connector, and connect
special tool power plant ECU check harness
(MB991987) and measure the voltage on the
check connector.
• Disconnect A-34 air flow sensor connector.
• Ignition switch: ON
• Voltage between terminal No. 129 and earth.
OK: 4.5
− 4.9 V
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Go to Step 11 .
STEP 10. Connector check: A-08 engine-ECU
connector
Q: Is the check result normal?
YES :
Check and repair harness between A-34
(terminal No. 1) air flow sensor connector
and A-08 (terminal No. 129) engine-ECU
connector.
• Check output line for open circuit.
NO :
Repair or replace.
AK402725
77
78
79
80
81
82
83
84
92
93
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99
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104
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106
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121
107
108
109
110
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112
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114
130
131
132
133
134
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136
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123
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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
AK402083
2
1
3
4
Connector: A-34
Harness side
connector
A-34 (GR)
AC
AK402725
77
78
79
80
81
82
83
84
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93
94
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99
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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
AK402083
2
1
3
4
Connector: A-34
Harness side
connector
A-34 (GR)
AC
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-42
STEP 11. Connector check: A-08 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Repair or replace.
STEP 12. Check harness between A-34 (terminal
No. 1) air flow sensor connector and A-08
(terminal No. 129) engine-ECU connector.
• Check output line for short circuit.
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Repair.
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
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-43
STEP 13. Perform voltage measurement at A-34
air flow sensor connector.
• Use special tool test harness (MB991709) to con-
nect connector only terminal No. 1 and No. 4, and
then measure at pick-up harness.
• Ignition switch: ON
• Voltage between terminal No. 1 and earth.
OK:
Ambient temperature at
−20°C: 3.8 − 4.4 V
Ambient temperature at 0
°C: 3.2 − 3.8 V
Ambient temperature at 20
°C: 2.3 − 2.9 V
Ambient temperature at 40
°C: 1.5 − 2.1 V
Ambient temperature at 60
°C: 0.8 − 1.4 V
Ambient temperature at 80
°C: 0.4 − 1.0 V
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Go to Step 14 .
STEP 14. Connector check: A-08 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 15 .
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
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-44
STEP 15. Check harness between A-34 (terminal
No. 1) air flow sensor connector and A-08
(terminal No. 129) engine-ECU connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 16 .
NO :
Repair.
STEP 16. Connector check: A-08 engine-ECU
connector
Q: Is the check result normal?
YES :
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 damage.
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
AK402083
2
1
3
4
Connector: A-34
Harness side
connector
A-34 (GR)
AC
Main
Index
Group
TOC
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