Mitsubishi Colt Ralliart. Manual — part 724
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-221
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III data list
• Refer to Data List Reference Table
.
a. Item 77: Accelerator pedal position sensor
(sub)
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 2 .
STEP 2. Connector check: B-26 accelerator pedal
position sensor connector
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Repair or replace.
STEP 3. Perform voltage measurement at B-26
accelerator pedal position sensor connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 4 and earth.
OK: 4.9
− 5.1 V
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Go to Step 4 .
STEP 4. Connector check: A-08 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Repair or replace.
AK402092
1
6 5 4 3 2
B-26(B)
AC
Connector: B-26
Harness side
connector
AK402092
1
6 5 4 3 2
B-26(B)
AC
Connector: B-26
Harness side
connector
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-222
STEP 5. Check harness between B-26 (terminal
No. 4) accelerator pedal position sensor
connector and A-08 (terminal No. 86) engine-ECU
connector.
• Check power supply line for open/short circuit.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Repair.
STEP 6. M.U.T.-III data list
• Refer to Data List Reference Table
.
a. Item 77: Accelerator pedal position sensor
(sub)
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 7. Connector check: A-08 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair or replace.
AK402092
1
6 5 4 3 2
B-26(B)
AC
Connector: B-26
Harness side
connector
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-223
STEP 8. Check harness between B-26 (terminal
No. 4) accelerator pedal position sensor
connector and A-08 (terminal No. 86) engine-ECU
connector.
• Check power supply line for damage.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair.
STEP 9. Check harness between B-26 (terminal
No. 6) accelerator pedal position sensor
connector and A-08 (terminal No. 88) engine-ECU
connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Repair.
STEP 10. Replace the accelerator pedal assembly
• After replacing the accelerator pedal assembly,
re-check the trouble symptoms.
Q: Is the check result normal?
YES :
Check end.
NO :
Replace engine-ECU.
AK402092
1
6 5 4 3 2
B-26(B)
AC
Connector: B-26
Harness side
connector
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
AK402092
1
6 5 4 3 2
B-26(B)
AC
Connector: B-26
Harness side
connector
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-224
Code No. P2128: Accelerator Pedal Position Sensor (Sub) Circuit High Input
OPERATION
• A power voltage of 5 V is applied to the accelera-
tor pedal position sensor (terminal No. 4) from the
engine-ECU (terminal No. 86).
• The power voltage is earthed to the engine-ECU
(terminal No. 87) from the accelerator pedal posi-
tion sensor (terminal No. 5).
• The sensor signal is inputted to the engine-ECU
(terminal No. 88) from the accelerator pedal posi-
tion sensor output terminal (terminal No. 6).
FUNCTION
• The accelerator pedal position sensor (sub) out-
puts voltage which corresponds to the accelera-
tor pedal depression.
• The engine-ECU checks whether the voltage is
within a specified range.
TROUBLE JUDGMENT
Check Condition
• Ignition switch is in "ON" position.
Judgment Criterion
• Accelerator pedal position sensor (main) output
voltage is more than 2.5 V.
PROBABLE CAUSE
• Failed accelerator pedal position sensor
• Open/short circuit in accelerator pedal position
sensor circuit or loose connector contact
• Failed engine-ECU
AK402697
R
92 93 94 95969798
77 78 79 808182838485868788899091
99
100
107 108 109 110 111112113114115116117118119120121
122 123 124 125126127128129130131132133134135136
101102103104105106
71 72
73 74
75 76
6
1 2 3 4 5
5 V
86
4
Accelerator
pedal
position
sensor
(sub)
Hall IC
Y-R
BR
P-B
88
87
6
5
Accelerator Pedal Position Sensor (sub) Circuit
A-08
B-26
Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Gray
R: Red P: Pink V: Violet P: Purple
AD
Engine-ECU
Main
Index
Group
TOC
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