Mitsubishi L200. Manual — part 83
TROUBLESHOOTING
DIESEL FUEL
13A-128
STEP 13. Check harness between A-132 (terminal
No. 1) electronic-controlled throttle valve
connector and C-105 (terminal No. 40) engine-
ECU connector.
• Check output line for short circuit.
Q: Is the check result normal?
YES :
Go to Step 14 .
NO :
Repair the damaged harness wire.
STEP 14. Check harness between A-132 (terminal
No. 2) electronic-controlled throttle valve
connector and C-105 (terminal No. 93) engine-
ECU connector.
• Check power supply line for damage.
Q: Is the check result normal?
YES :
Replace the electronic-controlled throttle
valve.
NO :
Repair the damaged harness wire.
AK604705
1
6 5 4 3 2
AB
A-132 (B)
Connector: A-132
Harness side
connector
AKA00089
1
2
3
4
5
6
7
8
9
10
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91
92
93
94
95
96
C-105 (B)
C-105 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-105
AB
AK604705
1
6 5 4 3 2
AB
A-132 (B)
Connector: A-132
Harness side
connector
AKA00089
1
2
3
4
5
6
7
8
9
10
11
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14
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93
94
95
96
C-105 (B)
C-105 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-105
AB
TROUBLESHOOTING
DIESEL FUEL
13A-129
STEP 15. Check harness between A-132 (terminal
No. 1) electronic-controlled throttle valve
connector and C-105 (terminal No. 40) engine-
ECU connector.
• Check output line for open circuit and damage.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Repair the damaged harness wire.
AK604705
1
6 5 4 3 2
AB
A-132 (B)
Connector: A-132
Harness side
connector
AKA00089
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
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48
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74
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76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
C-105 (B)
C-105 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-105
AB
TROUBLESHOOTING
DIESEL FUEL
13A-130
Code No. P0123: Throttle Position Sensor Circuit High Input
OPERATION
• A power voltage of 5 V is applied to the elec-
tronic-controlled throttle valve (terminal No. 2)
from the engine-ECU (terminal No. 93).
• The power voltage is earthed to the engine-ECU
(terminal No. 34) from the electronic-controlled
throttle valve (terminal No. 4).
• The sensor signal is inputted to the engine-ECU
(terminal No. 40) from the electronic-controlled
throttle valve output terminal (terminal No. 1).
FUNCTION
• The throttle position sensor converts the throttle
valve position into voltage and inputs it into the
engine-ECU.
• The engine-ECU control the throttle valve posi-
tion.
TROUBLE JUDGMENT
Check Conditions
• Battery positive voltage is 8 − 16 V
• 2 seconds later after the ignition switch has been
in "ON" position or the engine has started up
AKA00096
6
1 2 3 4 5
1
2
3
4
5 6 7 8 9
10 1112 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
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
43 44 45 46 47 48
73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96
93
2
Electronic-controlled
throttle valve
R
W
Engine-ECU
40
34
1
4
Throttle Position Sensor Circuit
C-105
A-132
(MU805200)
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 SI: Silver
Hall IC
5 V
B
B
AB
TROUBLESHOOTING
DIESEL FUEL
13A-131
Judgment Criterion
• The throttle position sensor output voltage is 4.85
V or more for 0.5 second.
PROBABLE CAUSES
• Failed throttle position sensor
• Open circuit or harness damage in throttle posi-
tion sensor circuit or loose connector contact
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III data list
• Refer to Data List Reference Table
.
a. Item 45: Throttle position sensor
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: A-132 electronic-
controlled throttle valve connector
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Repair or replace the connector.
STEP 3. Perform resistance measurement at A-
132 electronic-controlled throttle valve
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 7 .
NO :
Go to Step 4 .
STEP 4. Connector check: C-105 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Repair or replace the connector.
AK604705
1
6 5 4 3 2
AB
A-132 (B)
Connector: A-132
Harness side
connector
AK604705
1
6 5 4 3 2
AB
A-132 (B)
Connector: A-132
Harness side
connector
AKA00089
1
2
3
4
5
6
7
8
9
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
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
43
44
45
46
47
48
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
C-105 (B)
C-105 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-105
AB
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