Mitsubishi L200. Manual — part 110
TROUBLESHOOTING
DIESEL FUEL
13A-236
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 118: No. 2 exhaust gas temperature sensor
(catalyst temperature)
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-
159 No. 2 exhaust gas temperature sensor
(catalyst temperature) 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 .
1
2
AKB00272
A-159 (B)
Harness side
connector
Connector: A-159
No. 2 exhaust gas
temperature sensor
(catalyst temperature)
AB
TROUBLESHOOTING
DIESEL FUEL
13A-237
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-159 (terminal
No. 2) No. 2 exhaust gas temperature sensor
(catalyst temperature) connector and C-105
(terminal No. 83) engine-ECU connector.
NOTE: Before checking harness, check intemediate
connector A-28, and repair if necessary.
• Check earthing line for open circuit and damage.
Q: Is the check result normal?
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
1
2
AKB00272
A-159 (B)
Harness side
connector
Connector: A-159
No. 2 exhaust gas
temperature sensor
(catalyst temperature)
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
TROUBLESHOOTING
DIESEL FUEL
13A-238
YES :
Go to Step 7 .
NO :
Repair the damaged harness wire.
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-159 (terminal
No. 1) No. 2 exhaust gas temperature sensor
(catalyst temperature) connector and C-105
(terminal No. 59) engine-ECU connector.
NOTE: Before checking harness, check intemediate
connector A-28, and repair if necessary.
• Check output line for damage.
Q: Is the check result normal?
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
1
2
AKB00272
A-159 (B)
Harness side
connector
Connector: A-159
No. 2 exhaust gas
temperature sensor
(catalyst temperature)
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
TROUBLESHOOTING
DIESEL FUEL
13A-239
YES :
Go to Step 7 .
NO :
Repair the damaged harness wire.
Code No. P0489: EGR Valve Position Sensor Circuit Low 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
0.20 V or less for 0.5 second.
PROBABLE CAUSES
• Failed EGR valve position sensor
• Open/short circuit or harness damage in EGR
valve position sensor circuit or loose connector
contact
• Failed engine-ECU
AKA00103
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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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