Mitsubishi Colt Ralliart. Manual — part 743
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-297
STEP 14. Check harness between C-16 (terminal
No. 4) fuel pump connector and body earth.
• Check earthing line for open circuit and damage.
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Repair.
STEP 15. M.U.T.-III actuator test
• Refer to Actuator Test Reference Table
.
a. Item 07: Fuel pump relay
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 16. Perform voltage measurement at C-16
fuel pump connector.
• Disconnect connector and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 5 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 21 .
NO :
Go to Step 17 .
STEP 17. Check harness between C-16 (terminal
No. 5) fuel pump connector and B-103 (terminal
No. 4) fuel pump relay (2) connector.
NOTE: Before checking harness, check intermediate
connector B-128 and repair if necessary.
• Check output line for open/short circuit.
Q: Is the check result normal?
YES :
Go to Step 18 .
NO :
Repair.
AK402112
1
2
3
4
5
AC
Connector: C-16
Harness side
connector
C-16(G)
AK402112
1
2
3
4
5
AC
Connector: C-16
Harness side
connector
C-16(G)
AK402112
1
2
3
4
5
AC
Connector: C-16
Harness side
connector
C-16(G)
3
2
1
4
AK402111AC
J/B side
connector
Connector: B-103
J/B (front side)
B-103
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-298
STEP 18. Connector check: B-141 ignition switch
connector
Q: Is the check result normal?
YES :
Go to Step 19 .
NO :
Repair or replace.
STEP 19. Check harness between B-141 (terminal
No. 2) ignition switch connector and B-103
(terminal No. 1) fuel pump relay (2) connector.
NOTE: Before checking harness, check intermediate
connector B-129 and repair if necessary.
• Check power supply line for damage.
Q: Is the check result normal?
YES :
Go to Step 20 .
NO :
Repair.
1
2
3
4
5
6
AK402103
Connector: B-141
Harness side
connector
B-141
AC
1
2
3
4
5
6
AK402103
Connector: B-141
Harness side
connector
B-141
AC
3
2
1
4
AK402111AC
J/B side
connector
Connector: B-103
J/B (front side)
B-103
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-299
STEP 20. Connector check: A-08 engine-ECU
connector
Q: Is the check result normal?
YES :
Check intermediate connector B-110, and
repair if necessary. If the intermediate
connector is normal, check and repair
harness between B-103 (terminal No. 2) fuel
pump relay (2) connector and A-08 (terminal
No. 81) engine-ECU connector.
• Check earthing line for damage.
NO :
Repair or replace.
STEP 21. Connector check: B-141 ignition switch
connector
Q: Is the check result normal?
YES :
Go to Step 22 .
NO :
Repair or replace.
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
AK402111AC
J/B side
connector
Connector: B-103
J/B (front side)
B-103
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-300
STEP 22. Check harness between B-141 (terminal
No. 2) ignition switch connector and B-117
(terminal No. 1) fuel pump relay (1) connector.
NOTE: Before checking harness, check intermediate
connector B-129 and repair if necessary.
• Check power supply line for damage.
Q: Is the check result normal?
YES :
Go to Step 23 .
NO :
Repair.
STEP 23. Check harness between battery and
B-117 (terminal No. 3) fuel pump relay (1)
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 24 .
NO :
Repair.
1
2
3
4
5
6
AK402103
Connector: B-141
Harness side
connector
B-141
AC
AK402110
3
2
1
4
AC
J/B side
connector
Connector: B-117
J/B (front side)
B-117
AK402110
3
2
1
4
AC
J/B side
connector
Connector: B-117
J/B (front side)
B-117
Main
Index
Group
TOC
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