Mitsubishi L200. Manual — part 82
TROUBLESHOOTING
DIESEL FUEL
13A-124
Judgment Criterion
• The throttle position sensor output voltage is 0.15
V or less for 0.5 second.
PROBABLE CAUSES
• Failed throttle position sensor
• Open/short circuit or harness damage in throttle
position 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 voltage measurement at A-132
electronic-controlled throttle valve connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: ON
• Voltage between terminal No. 2 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: 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
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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-125
STEP 5. 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 open/short circuit.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Repair the damaged harness wire.
STEP 6. 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 :
Replace the engine-ECU. When the engine-
ECU is replaced, write the chassis number
(Refer to GROUP 00
− Precautions Before
Service
− How to Perform Chassis Number
Writing ). After replacing the engine-ECU,
register the injector identification code and
learn fuel injection (Refer to GROUP 00
−
Precautions Before Service
− What The
Common Rail Engine Learns ). After
registering the injector identification code,
the vehicle equipped with the DPF carries
out the forcible DPF regeneration. (Refer to
GROUP 17
− Emission Control − Diesel
Particulate Filter (DPF) System
− Forcible
DPF Regeneration ).
STEP 7. 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 10 .
NO :
Go to Step 8 .
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
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84
85
86
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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
AK604705
1
6 5 4 3 2
AB
A-132 (B)
Connector: A-132
Harness side
connector
TROUBLESHOOTING
DIESEL FUEL
13A-126
STEP 8. Connector check: C-105 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair or replace the connector.
STEP 9. Check harness between A-132 (terminal
No. 4) electronic-controlled throttle valve
connector and C-105 (terminal No. 34) engine-
ECU connector.
• Check earthing line for damage.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Repair the damaged harness wire.
AKA00089
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
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72
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48
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78
79
80
81
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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
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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76
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79
80
81
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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-127
STEP 10. Connector check: C-105 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Repair or replace the connector.
STEP 11. Perform voltage measurement at A-132
electronic-controlled throttle valve connector.
• Use special tool test harness (MB991658) to con-
nect connector, and measure at pick-up harness.
• Ignition switch: ON
• Voltage between terminal No. 1 and earth.
OK: 3.7 V or higher.
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Go to Step 12 .
STEP 12. Connector check: C-105 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Repair or replace the connector.
AKA00089
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
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72
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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
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
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34
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39
40
41
42
49
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52
53
54
55
56
57
58
59
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61
62
63
64
65
66
67
68
69
70
71
72
43
44
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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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