Mitsubishi Colt Ralliart. Manual — part 23
![](/vehicles/winoney/ama/flend/ndod.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-46
STEP 8. Check harness between A-121 (terminal
No. 1) engine coolant temperature sensor
connector and A-114 (terminal No. 14)
engine-ECU connector or engine-CVT-ECU
connector.
• Check output line for short circuit.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair the damaged harness wire.
STEP 9. M.U.T.-III data list
• Item 21: Engine coolant temperature sensor
OK:
Engine cold state: At ambient temperature
(atmospheric temperature) or equivalent.
Engine hot state: At 80
− 120 °C
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 <M/T> or
engine-CVT-ECU <CVT>.
STEP 10. Perform resistance measurement at
A-121 engine coolant temperature sensor
connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 2 and earth.
OK: Continuity (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Go to Step 11 .
AK402011
1
2
Connector: A-121
A-121 (B)
AD
A-121 Harness side
connector
AK402745
6
4
2
5
3
1
9
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L
AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
AK402011
1
2
Connector: A-121
A-121 (B)
AD
A-121 Harness side
connector
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/bbee.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-47
STEP 11. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Repair or replace the connector.
STEP 12. Check harness between A-121 (terminal
No. 2) engine coolant temperature sensor
connector and A-114 (terminal No. 29)
engine-ECU connector or engine-CVT-ECU
connector.
• Check earthing line for open circuit and damage.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair the damaged harness wire.
AK402745
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
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61
62
63
64
65
66
L
AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
AK402011
1
2
Connector: A-121
A-121 (B)
AD
A-121 Harness side
connector
AK402745
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
19
20
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50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/sowind.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-48
STEP 13. Perform voltage measurement at A-121
engine coolant temperature sensor connector.
• Use special tool test harness (MB991709) to con-
nect connector, and measure at pick-up harness.
• Ignition switch: ON
• Voltage between terminal No. 1 and earth.
OK:
Engine coolant temperature at
−20°C: 3.9 − 4.5
V
Engine coolant temperature at 0
°C: 3.2 − 3.8 V
Engine coolant temperature at 20
°C: 2.3 − 2.9 V
Engine coolant temperature at 40
°C: 1.3 − 1.9 V
Engine coolant temperature at 60
°C: 0.7 − 1.3 V
Engine coolant temperature at 80
°C: 0.3 − 0.9 V
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Go to Step 14 .
STEP 14. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Repair or replace the connector.
AK402011
1
2
Connector: A-121
A-121 (B)
AD
A-121 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
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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
AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
Main
Index
Group
TOC
![](/vehicles/winoney/ama/flend/ghofra.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-49
STEP 15. Check harness between A-121 (terminal
No. 1) engine coolant temperature sensor
connector and A-114 (terminal No. 14)
engine-ECU connector or engine-CVT-ECU
connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 16 .
NO :
Repair the damaged harness wire.
STEP 16. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector
Q: Is the check result normal?
YES :
Check and repair harness between A-121
(terminal No. 2) engine coolant temperature
sensor connector and A-114 (terminal No.
29) engine-ECU connector or
engine-CVT-ECU connector.
• Check earthing line for damage.
NO :
Repair or replace the connector.
AK402011
1
2
Connector: A-121
A-121 (B)
AD
A-121 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
AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
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
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47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
AD
A-114
Connector:
A-114
Harness side connector
Engine-ECU <M/T> or
engine-CVT-ECU <CVT>
Battery
AK402011
1
2
Connector: A-121
A-121 (B)
AD
A-121 Harness side
connector
Main
Index
Group
TOC
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