Mitsubishi L200. Manual — part 103
TROUBLESHOOTING
DIESEL FUEL
13A-208
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 ).
Code No. P0402: EGR Flow Excessive <Euro5>
OPERATION
• Refer to Code No. P0102: Air Flow Sensor Circuit
Low Input
.
• Refer to Code No. P0403: EGR Valve (DC Motor)
Malfunction
• Refer to Code No. P0489: EGR Valve Position
Sensor Circuit Low Input <Euro5>
.
FUNCTION
• The engine-ECU monitors the EGR flow rate.
TROUBLE JUDGMENT
Check Conditions
• Engine is running
• Battery positive voltage is 8 − 16 V.
• Vehicle is stopped (transmission: Neutral <M/T>,
P range <A/T>)
Judgment Criterion
• The EGR flow rate is smaller than target EGR
flow rate by the rate that is more than the speci-
fied value.
PROBABLE CAUSES
• Failed EGR passage (air suction)
• Harness damage in EGR valve circuit or loose
connector contact
• Failed EGR valve operation
• Harness damage in air flow sensor circuit or
loose connector contact
• Failed air flow sensor (abnormal output charac-
teristics)
• Failed engine-ECU
DIAGNOSTIC PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q: Is the diagnosis code P0403 or P2413 set?
YES :
Inspection chart for diagnosis codes (Refer
to
NO :
Go to Step 2 .
STEP 2. Connector check: A-45 EGR valve
assembly connector
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Repair or replace the connector.
AK501331
1
2
3
4
5
6
AB
Harness side
connector
A-45 (GR)
Connector: A-45
TROUBLESHOOTING
DIESEL FUEL
13A-209
STEP 3. Connector check: C-103 and C-105
engine-ECU connectors
Q: Is the check result normal?
YES :
Go to Step 4 .
NO :
Repair or replace the connector.
STEP 4. Check harness between C-103 (terminal
No. 115) engine-ECU connector and A-45
(terminal No. 6) EGR valve assembly connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Repair the damaged harness wire.
AKB00270
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C-105 (B)
C-103 (B)
C-105 (B)
C-103 (B)
<R.H. drive vehicles>
C-105 Harness side connector
C-103 Harness side connector
<L.H. drive vehicles>
Connectors: C-103, C-105
AB
AKA00090
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
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155
156
157
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117
145
116
144
C-103 (B)
C-103 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-103
AB
AK501331
1
2
3
4
5
6
AB
Harness side
connector
A-45 (GR)
Connector: A-45
TROUBLESHOOTING
DIESEL FUEL
13A-210
STEP 5. Check harness between C-103 (terminal
No. 130) engine-ECU connector and A-45
(terminal No. 4) EGR valve assembly connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Repair the damaged harness wire.
STEP 6. Check harness between C-105 (terminal
No. 81) engine-ECU connector and A-45 (terminal
No. 2) EGR valve assembly connector.
• Check earthing line for damage.
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Repair the damaged harness wire.
AKA00090
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
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120
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141
142
143
146
147
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149
150
151
152
153
154
155
156
157
158
117
145
116
144
C-103 (B)
C-103 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-103
AB
AK501331
1
2
3
4
5
6
AB
Harness side
connector
A-45 (GR)
Connector: A-45
AKA00089
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96
C-105 (B)
C-105 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-105
AB
AK501331
1
2
3
4
5
6
AB
Harness side
connector
A-45 (GR)
Connector: A-45
TROUBLESHOOTING
DIESEL FUEL
13A-211
STEP 7. Check harness between C-105 (terminal
No. 71) engine-ECU connector and A-45 (terminal
No. 3) EGR valve assembly connector.
• Check power supply line for damage.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair the damaged harness wire.
STEP 8. Check harness between C-105 (terminal
No. 57) engine-ECU connector and A-45 (terminal
No. 1) EGR valve assembly connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair the damaged harness wire.
STEP 9. Check EGR valve itself.
• Check EGR valve itself [Refer to GROUP 17 −
Emission Control
− Exhaust Gas Recirculation
(EGR) System
− EGR Valve (DC motor) Check ].
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Replace the EGR valve assembly.
AKA00089
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96
C-105 (B)
C-105 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-105
AB
AK501331
1
2
3
4
5
6
AB
Harness side
connector
A-45 (GR)
Connector: A-45
AKA00089
1
2
3
4
5
6
7
8
9
10
11
12
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14
15
16
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31
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37
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41
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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
AK501331
1
2
3
4
5
6
AB
Harness side
connector
A-45 (GR)
Connector: A-45
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