Mitsubishi Colt Ralliart. Manual — part 742
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-293
STEP 5. Connector check: B-141 ignition switch
connector
Q: Is the check result normal?
YES :
Check intermediate connector B-129, and
repair if necessary. If intermediate
connector is normal, check and repair
harness between B-117 (terminal No. 1) fuel
pump relay (1) connector and B-141
(terminal No. 2) ignition switch connector.
• Check power supply line for
open/short circuit.
NO :
Repair or replace.
STEP 6. Perform voltage measurement at B-117
fuel pump relay (1) connector.
• Remove relay, and measure at connector side.
• Voltage between terminal No. 3 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Check intermediate connector B-108, and
repair if necessary. If intermediate
connector is normal, check and repair
harness between battery and B-117
(terminal No. 3) fuel pump relay (1)
connector.
• Check power supply line for
open/short circuit.
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
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-294
STEP 7. Perform resistance measurement at
B-103 fuel pump relay (2) connector.
• Remove relay, and measure at connector side.
• Ignition switch: ON
• Resistance between terminal No. 2 and earth.
OK: Continuity
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Go to Step 8 .
STEP 8. Connector check: A-08 engine-ECU
connector
3
2
1
4
AK402111AC
J/B side
connector
Connector: B-103
J/B (front side)
B-103
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
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-295
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 open/short
circuit.
NO :
Repair or replace.
STEP 9. Perform voltage measurement at B-103
fuel pump relay (2) connector.
• Remove relay, and measure at connector side.
• Ignition switch: ON
• Voltage between terminal No. 1 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Go to Step 10 .
STEP 10. Connector check: B-141 ignition switch
connector
Q: Is the check result normal?
YES :
Check intermediate connector B-129, and
repair if necessary. If the intermediate
connector is normal, check and repair
harness between B-103 (terminal No. 1) fuel
pump relay (2) connector and B-141
(terminal No. 2) ignition switch connector.
• Check power supply line for
open/short circuit.
NO :
Repair or replace.
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
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-296
STEP 11. Perform voltage measurement at B-103
fuel pump relay (2) connector.
• Disconnect relay, and measure at connector side.
• Ignition switch: ON
• Voltage between terminal No. 3 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Check and repair harness between B-117
(terminal No. 4) fuel pump relay (1)
connector and B-103 (terminal No. 3) fuel
pump relay (2) connector.
• Check power supply line for
open/short circuit.
STEP 12. Connector check: C-16 fuel pump
connector
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Repair or replace.
STEP 13. Perform resistance measurement at
C-16 fuel pump 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 16 .
NO :
Go to Step 14 .
AK402109
3
2
1
4
AC
J/B side
connector
Connector: B-103, B-117
J/B (front side)
B-117
B-103
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)
Main
Index
Group
TOC
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