Mitsubishi L200. Manual — part 170
TROUBLESHOOTING
DIESEL FUEL
13A-476
STEP 11. Check valve clearance.
• Check valve clearance (Refer to GROUP 11A −
On-vehicle Service
− Valve Clearance Check and
Adjustment ).
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Adjust the valve clearance.
STEP 12. Check injector itself.
• Check injector itself (Refer to
).
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Replace the injector at the failed cylinder.
After replacing the Injector, register the
injector identification code and learn fuel
injection (Refer to GROUP 00
− Precautions
Before Service
− What The Common Rail
Engine Learns ).
STEP 13. Check the trouble symptoms.
Q: Does trouble symptom persist?
YES :
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 ).
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use Troubleshooting/
Inspection Service Points
− How to Cope
with Intermittent Malfunction ).
Inspection Procedure 12: White Smoke
PROBABLE CAUSES
• Improper fuel used
• Injector leaking or clogged
• Failed injector
• Fuel injection learning failure
• Fuel filter clogged
• Fuel line leaking or clogged
• Failed fuel pressure limiter valve
• Failed rail pressure sensor
• Failed supply pump (suction control valve)
• Failed supply pump correction learning
• Failed EGR system operation
• Failed engine-ECU
• Compression pressure low
• Air cleaner clogged
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code.
Q: Is the diagnosis code set?
YES :
Inspection chart for diagnosis code (Refer
to
NO :
Go to Step 2 .
STEP 2. Check idling condition.
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Proceed to troubleshooting for improper
idling (Refer to Inspection Procedure 7
).
TROUBLESHOOTING
DIESEL FUEL
13A-477
STEP 3. M.U.T.-III data list.
• Refer to Data List Reference Table
.
a. Item 5: Barometric pressure sensor
b. Item 6: Manifold absolute pressure sensor
c. Item 7: Engine coolant temperature sensor
d. Item 8: EGR gas temperature sensor
<Euro5>
e. Item 8: Intake air temperature sensor No. 2
<Except Euro5>
f. Item 9: Accelerator pedal position sensor
(main)
g. Item 10: Accelerator pedal position sensor
(sub)
h. Item 13: Accelerator pedal position sensor
(main) learned closed position
i. Item 16: EGR valve position sensor
j. Item 17: EGR valve target position
k. Item 21: Fuel temperature sensor
l. Item 43: Intake air temperature sensor No. 1
m. Item 45: Throttle position sensor
n. Item 46: Throttle position sensor learned
closed position
Q: Are the check results normal?
YES :
Go to Step 4 .
NO :
Perform the diagnosis code classified check
procedure for the sensor that has shown an
abnormal data value (Refer to Inspection
Chart for Diagnosis Code
STEP 4. Check injector identification code.
• Check injector identification code (Refer to
GROUP 00
− Precautions Before Service − Injec-
tor Identification code Registration Procedure ).
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Register the injector ID.
STEP 5. Supply pump correction learning.
• Carry out the supply pump correction learning
(Refer to GROUP 00
− Precautions Before Serv-
ice
− Supply Pump Correction Learning ).
Q: Does trouble symptom persist?
YES :
Go to Step 6 .
NO :
The procedure is complete.
STEP 6. Small injection quantity learning.
• Carry out the small injection quantity learning
procedure (Refer to GROUP 00
− Precautions
Before Service
− Small Injection Quantity Learn-
ing Procedure ).
Q: Does trouble symptom persist?
YES :
Go to Step 7 .
NO :
The procedure is complete.
STEP 7. Check air cleaner.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Replace air cleaner.
STEP 8. Confirm the using fuel.
Q: Is the specified fuel being used?
YES :
Go to Step 9 .
NO :
Replace fuel.
STEP 9. Check fuel supply line.
• Check for fuel leakage and clogging.
• Check fuel filter for clogging.
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Repair or replace the failed item.
STEP 10. Priming (air bleeding)
• Bleed air.
Q: Does trouble symptom persist?
YES :
Go to Step 11 .
NO :
The procedure is complete.
STEP 11. M.U.T.-III actuator test.
• Refer to Actuator Test Reference Table
a. Item 19: Suction control valve
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Replace the suction control valve. After
replacing the suction control valve, learn the
supply pump (Refer to GROUP 00
−
Precautions Before Service
− What The
Common Rail Engine Learns ).
STEP 12. Check suction control valve itself.
• Check suction control value itself (Refer to
).
Q: Is the check result normal?
TROUBLESHOOTING
DIESEL FUEL
13A-478
YES :
Go to Step 13 .
NO :
Replace the suction control valve. After
replacing the suction control valve, learn the
supply pump (Refer to GROUP 00
−
Precautions Before Service
− What The
Common Rail Engine Learns ).
STEP 13. M.U.T.-III data list.
• Refer to Data List Reference Table
.
a. Item 63: Rail pressure sensor
b. Item 64: Rail pressure target
Q: Are the check results normal?
YES :
Go to Step 15 .
NO :
Go to Step 14 .
STEP 14. Replace the rail pressure sensor.
• Replace the common-rail assembly.
Q: Does trouble symptom persist?
YES :
Go to Step 18 .
NO :
The procedure is complete.
STEP 15. Check the waveforms of crank angle
sensor and camshaft position sensor.
• Check the output waveforms on an oscilloscope
(Refer to
Q: Is the check result normal?
YES :
Go to Step 16 .
NO :
Proceed to the inspection procedure by
diagnosis code for the abnormal waveform
(Refer to Inspection Chart for Diagnosis
Code
).
STEP 16. Check compression pressure.
• Check compression pressure (Refer to GROUP
11A
− On-vehicle Service − Compression Pres-
sure Check ).
Q: Is the check result normal?
YES :
Go to Step 17 .
NO :
Check and repair the engine itself.
STEP 17. Check injector itself.
• Check injector itself (Refer to
).
Q: Is the check result normal?
YES :
Go to Step 18 .
NO :
Replace the injector at the failed cylinder.
After replacing the Injector, register the
injector identification code and learn fuel
injection (Refer to GROUP 00
− Precautions
Before Service
− What The Common Rail
Engine Learns ).
STEP 18. Check the trouble symptoms.
Q: Does trouble symptom persist?
YES :
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 ).
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use Troubleshooting/
Inspection Service Points
− How to Cope
with Intermittent Malfunction ).
Inspection Procedure 13: Black Smoke
PROBABLE CAUSES
• Improper fuel used
• Injector leaking or clogged
• Failed injector
• Fuel injection learning failure
• Failed fuel pressure limiter valve
• Failed rail pressure sensor
• Failed supply pump (suction control valve)
• Failed supply pump correction learning
• Failed EGR system operation
• Failed glow system
• Failed engine-ECU
• Compression pressure low
• Failed turbocharger
• Improper engine oil volume or viscosity
TROUBLESHOOTING
DIESEL FUEL
13A-479
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code.
Q: Is the diagnosis code set?
YES :
Inspection chart for diagnosis code (Refer
to
NO :
Go to Step 2 .
STEP 2. Check idling condition.
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Proceed to troubleshooting for improper
idling (Refer to Inspection Procedure 7
).
STEP 3. M.U.T.-III data list.
• Refer to Data List Reference Table
.
a. Item 5: Barometric pressure sensor
b. Item 6: Manifold absolute pressure sensor
c. Item 7: Engine coolant temperature sensor
d. Item 8: EGR gas temperature sensor
<Euro5>
e. Item 8: Intake air temperature sensor No. 2
<Except Euro5>
f. Item 9: Accelerator pedal position sensor
(main)
g. Item 10: Accelerator pedal position sensor
(sub)
h. Item 13: Accelerator pedal position sensor
(main) learned closed position
i. Item 16: EGR valve position sensor
j. Item 17: EGR valve target position
k. Item 21: Fuel temperature sensor
l. Item 43: Intake air temperature sensor No. 1
m. Item 45: Throttle position sensor
n. Item 46: Throttle position sensor learned
closed position
Q: Are the check results normal?
YES :
Go to Step 4 .
NO :
Perform the diagnosis code classified check
procedure for the sensor that has shown an
abnormal data value (Refer to Inspection
Chart for Diagnosis Code
STEP 4. Check injector identification code.
• Check injector identification code (Refer to
GROUP 00
− Precautions Before Service − Injec-
tor Identification code Registration Procedure ).
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Register the injector ID.
STEP 5. Supply pump correction learning.
• Carry out the supply pump correction learning
(Refer to GROUP 00
− Precautions Before Serv-
ice
− Supply Pump Correction Learning ).
Q: Does trouble symptom persist?
YES :
Go to Step 6 .
NO :
The procedure is complete.
STEP 6. Small injection quantity learning.
• Carry out the small injection quantity learning
procedure (Refer to GROUP 00
− Precautions
Before Service
− Small Injection Quantity Learn-
ing Procedure ).
Q: Does trouble symptom persist?
YES :
Go to Step 7 .
NO :
The procedure is complete.
STEP 7. Confirm the using fuel.
Q: Is the specified fuel being used?
YES :
Go to Step 8 .
NO :
Replace fuel.
STEP 8. Check engine oil.
Q: Are the oil volume and viscosity normal?
YES :
Go to Step 9 .
NO :
Replenish or change engine oil.
STEP 9. Check glow system.
• Check glow system (Refer to Code No. P0381
<Euro5> or Inspection Procedure 25
<Except Euro5>).
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Repair or replace the failed item.
STEP 10. Check turbocharger itself.
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Repair the turbocharger.
STEP 11. Check the waveforms of crank angle
sensor and camshaft position sensor.
• Check the output waveforms on an oscilloscope
Q: Is the check result normal?
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