Mitsubishi L200. Manual — part 117
TROUBLESHOOTING
DIESEL FUEL
13A-264
STEP 6. Check harness between A-149 (terminal
No. 1) No. 1 exhaust gas temperature sensor
connector and C-105 (terminal No. 58) engine-
ECU connector.
• Check output line for open circuit.
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Repair the damaged harness wire.
STEP 7. M.U.T.-III data list
• Refer to Data List Reference Table
a. Item 117: No. 1 exhaust gas temperature 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,
carry out the forcible DPF regeneration.
(Refer to GROUP 17
− Emission Control −
Diesel Particulate Filter (DPF) System
−
Forcible DPF Regeneration ).
STEP 8. Perform resistance measurement at A-
149 No. 1 exhaust gas temperature sensor
connector.
• Disconnect connector, and measure at harness
side.
• Resistance between terminal No. 2 and earth.
OK: Continuity (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Go to Step 9 .
AKB00276
1
2
Harness side
connector
AB
A-149 (B)
Connector: A-149
AKA00089
1
2
3
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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
AKB00276
1
2
Harness side
connector
AB
A-149 (B)
Connector: A-149
TROUBLESHOOTING
DIESEL FUEL
13A-265
STEP 9. Connector check: C-105 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Repair or replace the connector.
STEP 10. Check harness between A-149 (terminal
No. 2) No. 1 exhaust gas temperature sensor
connector and C-105 (terminal No. 82) engine-
ECU connector.
• Check earthing line for open circuit and damage.
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Repair the damaged harness wire.
AKA00089
1
2
3
4
5
6
7
8
9
10
11
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91
92
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94
95
96
C-105 (B)
C-105 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-105
AB
AKB00276
1
2
Harness side
connector
AB
A-149 (B)
Connector: A-149
AKA00089
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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85
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87
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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
TROUBLESHOOTING
DIESEL FUEL
13A-266
STEP 11. Connector check: C-105 engine-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-149 (terminal
No. 1) No. 1 exhaust gas temperature sensor
connector and C-105 (terminal No. 58) engine-
ECU connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 7 .
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
20
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72
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48
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79
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81
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83
84
85
86
87
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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
AKB00276
1
2
Harness side
connector
AB
A-149 (B)
Connector: A-149
AKA00089
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
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64
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72
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48
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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-267
Code No. P0551: Power Steering Fluid Pressure Switch System
OPERATION
• The battery voltage is applied to the power steer-
ing pressure switch (terminal No. 1) from the
engine-ECU (terminal No. 127)
FUNCTION
• It is detected whether a load is applied on the
power steering fluid pump by steering or not, and
the signal is inputted to the engine-ECU. When
the power steering fluid pressure switch "ON" sig-
nal (a large load on the power steering fluid
pump) is inputted, the engine-ECU provides the
idle-up control.
TROUBLE JUDGMENT
Check Condition
• Within 5 seconds after the ignition switch is in the
"OFF" position.
Judgment Criterion
• For 2 seconds, the power steering fluid pressure
switch is in the "ON" position and the engine con-
tinuously stops.
PROBABLE CAUSES
• Failed power steering fluid pressure switch
• Short circuit in power steering fluid pressure
switch circuit or loose connector contact
• Failed engine-ECU
DIAGNOSIS PROCEDURE
AKA00105
1
101 102
103104 105 106107 108109 110 111112 113 114115
118119 120 121122 123124 125126127 128 129130
131132 133 134135 136137 138139140 141142 143
146147 148 149150 151152 153154155 156 157158
117
145
116
144
127
5
8
A-115
A-27
1
Power steering fluid
pressure switch
ON
OFF
B-R
B-R
B-R
Engine-ECU
A-134
(MU801211)
C-103
Power steering fluid pressure switch circuit
Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Grey
R: Red P: Pink V: Violet PU: Purple SI: Silver
AB
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