Mitsubishi Colt Ralliart. Manual — part 720
![](/vehicles/winoney/ama/flend/uelat.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-205
Code No. P2100: Throttle Valve Control Servo Circuit (open)
OPERATION
• Controls the current that is applied from the
engine-ECU (terminals No. 7, No. 22) to the elec-
tronic-controlled throttle valve (terminals No. 5,
No. 6).
FUNCTION
• Engine-ECU varies the direction and the amper-
age of the current that is applied to the throttle
valve control servo in order to control the opening
of the throttle valve.
TROUBLE JUDGMENT
Check Conditions
• Ignition switch is in "ON" position.
• Throttle valve control servo supply voltage is
more than 6.0 V.
• Battery voltage is more than 8.3 V.
Judgement Criterion
• There is deviation between throttle valve actual
opening angle and target opening angle.
PROBABLE CAUSE
• Failed throttle valve control servo.
• Open/short circuit in throttle valve control servo
circuit or lose connector contact.
• Failed engine-ECU
AK402849
6
1 2 3 4 5
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
19
21
20
18
17
16
15
14
1213
11
8 9
L
10
37
52 53 54 555657585960616263646566
38 39 404142434445464748495051
22 23 24 252627282930313233343536
7
5
3
1
6
4
2
7
6
6
3
BR
G-W
Engine-ECU
Earth J/C
22
93
108
5
A-107
A-30
Throttle Valve Control Servo Circuit
A-114
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 PU: Purple
Electronic-controlled
throttle valve
A-08
AC
B
B
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/uhe.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-206
DIAGNOSIS PROCEDURE
STEP 1. Connector check: A-107
electronic-controlled throttle valve connector
Q: Is the check result normal?
YES :
Go to Step 2 .
NO :
Repair or replace.
STEP 2. Perform resistance measurement at
A-107 electronic-controlled throttle valve
connector.
• Disconnect connector, and measure at elec-
tronic-controlled throttle valve side.
• Resistance between terminal No. 6 and No. 5.
OK: 0.3
− 100 kΩ (at 20°C)
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Replace throttle body assembly.
STEP 3. Connector check: A-08 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 4 .
NO :
Repair or replace.
AK402086
1
6 5 4 3 2
A-107(B)
AC
Connector: A-107
Harness side
connector
AK402086
1
6 5 4 3 2
A-107(B)
AC
Connector: A-107
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
![](/vehicles/winoney/ama/flend/vefehen.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-207
STEP 4. Perform resistance measurement at A-08
engine-ECU connector.
• Disconnect connector and measure at harness
side.
• Resistance between terminal No. 93, No. 108
and earth.
OK: Continuity (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
• Check intermediate connector A-30, and
repair if necessary. If intermediate
connector is normal, check and repair
harness between engine-ECU connector
and earth.
a. Check and repair harness between
A-08 (terminal No. 93) engine-ECU
connector and earth.
b. Check and repair harness between
A-08 (terminal No. 108) engine-ECU
connector and earth.
STEP 5. Check harness between A-107 (terminal
No. 6) electronic-controlled throttle valve
connector and A-114 (terminal No. 7) engine-ECU
connector.
• Check output line for short circuit and damage.
Q: Is the check result normal?
YES :
Go to Step 6 .
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
AK402086
1
6 5 4 3 2
A-107(B)
AC
Connector: A-107
Harness side
connector
AK402745
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
AF
A-114
Connector:
A-114
Harness side connector
Engine-ECU
Battery
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/ura.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4G1>
13B-208
STEP 6. Check harness between A-107 (terminal
No. 5) electronic-controlled throttle valve
connector and A-114 (terminal No. 22)
engine-ECU connector.
• Check output line for short circuit and damage.
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Repair.
STEP 7. Check the trouble symptoms.
Q: Is the check result normal?
YES :
Replace engine-ECU.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
−
How to Cope with Intermittent Malfunctions
).
AK402086
1
6 5 4 3 2
A-107(B)
AC
Connector: A-107
Harness side
connector
AK402745
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
AF
A-114
Connector:
A-114
Harness side connector
Engine-ECU
Battery
Main
Index
Group
TOC
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