Mitsubishi L200. Manual — part 112
TROUBLESHOOTING
DIESEL FUEL
13A-244
STEP 12. Perform voltage measurement at A-45
EGR valve assembly connector.
• Use special tool test harness (MB991658) to con-
nect connector and measure at pick-up harness.
• Engine: Idling (after warning up)
• Voltage between terminal No. 1 and earth.
OK: 2.0 V or higher
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Go to Step 13 .
STEP 13. Connector check: C-105 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 14 .
NO :
Repair or replace the connector.
STEP 14. Check harness between A-45 (terminal
No. 1) EGR valve assembly connector and C-105
(terminal No. 57) engine-ECU connector.
• Check output line for short circuit.
Q: Is the check result normal?
YES :
Replace the EGR valve assembly.
NO :
Repair the damaged harness wire.
AK501331
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AB
Harness side
connector
A-45 (GR)
Connector: A-45
AKA00089
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C-105 (B)
C-105 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-105
AB
AK501331
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5
6
AB
Harness side
connector
A-45 (GR)
Connector: A-45
AKA00089
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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-245
STEP 15. Perform voltage measurement at C-105
engine-ECU connector.
• Measure engine-ECU terminal voltage.
• Engine: Idling (after warning up)
• Voltage between terminal No. 57 and earth.
OK: 2.0 V or higher
Q: Is the check result normal?
YES :
Go to Step 17 .
NO :
Go to Step 16 .
STEP 16. Connector check: C-105 engine-ECU
connector
Q: Is the check result normal?
YES :
Check and repair harness between A-45
(terminal No. 1) EGR valve assembly
connector and C-105 (terminal No. 57)
engine-ECU connector.
• Check output line for open circuit and
damage.
NO :
Repair or replace the connector.
AKA00089
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C-105 (B)
C-105 (B)
<R.H. drive vehicles>
Harness side connector
<L.H. drive vehicles>
Connector: C-105
AB
AKA00089
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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-246
STEP 17. Connector check: C-105 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Repair or replace the connector.
AKA00089
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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-247
Code No. P0490: EGR Valve Position Sensor Circuit High Input <Euro5>
OPERATION
• A power voltage of 5 V is applied to the EGR
valve assembly power terminal (terminal No. 3)
from the engine-ECU (terminal No. 71) and
earthed to the engine-ECU (terminal No. 81) from
the EGR valve assembly (terminal No. 2).
• The sensor signal is inputted to the engine-ECU
(terminal No. 57) from the EGR valve assembly
output terminal (terminal No. 1).
FUNCTION
• The EGR valve assembly detects the position of
the EGR valve and sends the signal to the
engine-ECU.
• Based on the signal, the engine-ECU performs
the feedback control of the EGR valve.
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.
Judgment Criterion
• The EGR valve position sensor output voltage is
4.80 V or more for 0.5 second.
PROBABLE CAUSES
• Failed EGR valve position sensor
• Open circuit in EGR valve position sensor circuit
or loose connector contact
• Failed engine-ECU
AKA00103
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5 6
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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
5 V
71
3
EGR valve assembly
SB
G-B
BR-B
57
81
1
2
EGR valve Position Sensor Circuit
C-105
A-45
(MU802056)
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
Engine-ECU
AB
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