Mitsubishi Colt Ralliart. Manual — part 740
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-285
STEP 6. 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.
• Ignition switch: ON
• Voltage between terminal No. 77 and earth, also
between terminal No. 92 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Check intermediate connector B-112, and
repair if necessary. If intermediate
connector is normal, check and repair
harness between B-106 (terminal No. 2)
engine control relay connector and A-08
(terminal No. 107) engine-ECU connector.
• Check signal line for short circuit.
NO :
Go to Step 7 .
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-286
STEP 7. Check harness between B-106 (terminal
No. 4) engine control relay connector and A-08
(terminal No. 77 and No. 92) engine-ECU
connector.
•
Check power supply line for open/short circuit or
damage.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair.
STEP 8. Perform voltage measurement at A-08
engine-ECU connector.
•
Disconnect connector and measure at harness side.
• Ignition switch: ON
• Voltage between terminal No. 122 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Go to Step 9 .
STEP 9. Connector check: B-141 ignition switch
connector
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Repair or replace.
3
2
1
4
AK402084
J/B side
connector
B-106
Connector: B-106
J/B (front side)
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
1
2
3
4
5
6
AK402103
Connector: B-141
Harness side
connector
B-141
AC
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-287
STEP 10. Check ignition switch.
•
Check ignition switch (Refer to GROUP 54A
− Ignition
Switch
− Inspection
).
Q: Is the check result normal?
YES :
Check intermediate connectors B-110,
B-129, and repair if necessary. If
intermediate connectors are normal, check
and repair harness between B-141 (terminal
No. 2) ignition switch connector and A-08
(terminal No. 122) engine-ECU connector.
• Check output line for open/short
circuit.
NO :
Replace ignition switch.
STEP 11. Check harness between B-106 (terminal
No. 2) engine control relay connector and A-08
(terminal No. 107) engine-ECU connector.
NOTE: Before checking harness, check intermediate
connector B-112 and repair if necessary.
• Check output line for damage.
1
2
3
4
5
6
AK402103
Connector: B-141
Harness side
connector
B-141
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
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-288
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Repair.
STEP 12. Check harness between battery and
B-106 (terminal No. 1 and No. 3) engine control
relay connector.
NOTE: Before checking harness, check intermediate
connector B-108 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. Check harness between B-141 (terminal
No. 2) ignition switch connector and A-08
(terminal No. 122) engine-ECU connector.
NOTE: Before checking harness, check intermediate
connectors B-110, B-129, and repair if necessary.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 14 .
NO :
Repair.
3
2
1
4
AK402084
J/B side
connector
B-106
Connector: B-106
J/B (front side)
AC
1
2
3
4
5
6
AK402103
Connector: B-141
Harness side
connector
B-141
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
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