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Q.
Is the diagnosis code set?
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Inspection chart for diagnosis code (Refer to ).
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Q.
Is the check result normal?
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Proceed to troubleshooting for improper idling (Refer to ).
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- Refer to Data List Reference Table .
- Item 5: Barometric pressure sensor
- Item 6: Manifold absolute pressure sensor
- Item 7: Engine coolant temperature sensor
- Item 8: EGR gas temperature sensor
- Item 9: Accelerator pedal position sensor (main)
- Item 10: Accelerator pedal position sensor (sub)
- Item 16: EGR valve position sensor
- Item 21: Fuel temperature sensor
- Item 43: Intake air temperature sensor
- Item 45: Throttle position sensor
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Q.
Are the check results normal?
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Perform the diagnosis code classified check procedure for the sensor that has shown an abnormal data value (Refer to Inspection Chart for Diagnosis Code ).
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- Check injector identification code (Refer to GROUP 00 - Precautions before Service - Injector Identification Code Registration Procedure <4N1>
).
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Q.
Is the check result normal?
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Register the injector ID.
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- Carry out the supply pump correction learning (Refer to GROUP 00 - Precautions before Service - Supply Pump Correction Learning Procedure <4N1>
).
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Q.
Does the trouble symptom persist?
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|
- Carry out the small injection quantity learning procedure (Refer to GROUP 00 - Precautions before Service - Small Injection Quantity Learning Procedure <4N1>
).
|
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Q.
Does the trouble symptom persist?
|
|
- Check for foreign matters (water, petrol fuel, etc.) in fuel.
|
|
Q.
Is the specified fuel being used?
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Q.
Are the oil volume and viscosity normal?
|
|
Replenish or change engine oil.
|
|
|
|
- Refer to Actuator Test Reference Table .
- Item 54: Glow (PWM) 0%
- Item 55: Glow (PWM) 50%
- Item 56: Glow (PWM) 100%
|
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Q.
Is the check result normal?
|
|
Check the glow plug system (Refer to Code No. P0381 ).
|
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- Check the EGR cooler bypass control system (Refer to GROUP 17 - Emission Control <Diesel> - Exhaust Gas Recirculation (EGR) System - EGR Cooler Bypass Control System Check ).
|
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Q.
Is the check result normal?
|
|
- Item 31: EGR cooler bypass control solenoid valve
|
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OK: Operating sound can be heard and the valve vibrates
|
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Q.
Is the check result normal?
|
|
Check the connection condition of the vacuum hoses which can be removed, loosened, clogged possibly. And then check whether there are no folded and damaged vacuum hoses.
|
|
|
|
Check the EGR cooler bypass control solenoid valve circuit (Refer to Code No. P2426 , Refer to Code No. P2427 ).
|
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- Check the EGR valve vacuum actuator [Refer to GROUP 17 - Emission Control <Diesel> - Exhaust Gas Recirculation (EGR) System - EGR Valve (DC Motor) Check ].
|
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Q.
Is the check result normal?
|
|
- Refer to Actuator Test Reference Table .
- Item 19: Suction control valve
|
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Q.
Is the check result normal?
|
|
Check suction control valve system (Refer to Code No. P0003 , Refer to Code No. P0004 ).
|
|
|
|
- Refer to Data List Reference Table .
- Item 63: Rail pressure sensor
- Item 64: Rail pressure target
|
|
Q.
Are the check results normal?
|
|
- After replacing the common-rail assembly, re-check the trouble symptoms.
|
|
Q.
Does the trouble symptom persist?
|
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Q.
Does the trouble symptom persist?
|
|
Replace the supply pump assembly.
|
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|
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions).
|
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- Check compression pressure (Refer to GROUP 11E - On-vehicle Service - Compression Pressure Check ).
|
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Q.
Is the check result normal?
|
|
- Check injector itself (Refer to ).
|
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Q.
Is the check result normal?
|
|
Replace the injector at the failed cylinder.
|
|
|
|
- Check the turbocharging pressure (Refer to GROUP 15 - On-vehicle Service - Turbocharger Supercharging Pressure Check ).
|
|
Q.
Is the check result normal?
|
|
- Check EGR valve itself [Refer to GROUP 17 - Emission Control <Diesel> - Exhaust Gas Recirculation (EGR) System - EGR Valve (DC Motor) Check ].
|
|
Q.
Is the check result normal?
|
|
Q.
Does the trouble symptom persist?
|
|
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions).
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