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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 idling condition normal?
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Proceed to troubleshooting for improper idling (Refer to Inspection Procedure 7 ).
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- Refer to Data List Reference Table (Refer to ).
- Item 05: Barometric pressure sensor
- Item 06: Manifold absolute pressure sensor
- Item 07: Engine coolant temperature sensor
- Item 08: No. 2 intake air temperature sensor
- Item 09: Accelerator pedal position sensor (main)
- Item 10: Accelerator pedal position sensor (sub)
- Item 13: Accelerator pedal position sensor (main) learned closed position
- Item 16: Exhaust gas recirculation valve position
- Item 17: Exhaust gas recirculation valve target position
- Item 21: Fuel temperature sensor
- Item 43: No. 1 intake air temperature sensor
- Item 45: Throttle position sensor
- Item 46: Throttle position sensor learned closed position
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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 ).
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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 ).
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Q.
Does trouble symptom persist?
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The procedure is complete.
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- Carry out the small injection quantity learning procedure (Refer to GROUP 00 - Precautions Before Service - Small Injection Quantity Learning Procedure ).
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Q.
Does trouble symptom persist?
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The procedure is complete.
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Q.
Is the check result normal?
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Q.
Is the specified fuel being used?
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- Check for fuel leakage and clogging.
- Check fuel filter for clogging.
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Q.
Is the check result normal?
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Repair or replace the failed item.
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Q.
Does trouble symptom persist?
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The procedure is complete.
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- Refer to Actuator Test Reference Table .
- Item 19: Suction control valve.
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Q.
Is the check result normal?
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Replace the supply pump. After replacing the supply pump, learn the supply pump (Refer to GROUP 00 - Precautions Before Service - What The Common Rail Engine Learns ).
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- Check suction control valve itself (Refer to ).
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Q.
Is the check result normal?
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Replace the supply pump. After replacing the supply pump, learn the supply pump (Refer to GROUP 00 - Precautions Before Service - What The Common Rail Engine Learns ).
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- Refer to Data List Reference Table (Refer to ).
- Item 63: Rail pressure sensor
- Item 64: Rail pressure target
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Q.
Are the check results normal?
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- Replace the common-rail assembly.
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Q.
Does trouble symptom persist?
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The procedure is complete.
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- Check the output waveforms on an oscilloscope (Refer to ).
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Q.
Is the check result normal?
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Proceed to the inspection procedure by diagnosis code for the abnormal waveform (Refer to Inspection Chart for Diagnosis Code ).
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- Check compression pressure (Refer to GROUP 11G - On-vehicle Service - Compression Pressure Check ).
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Q.
Is the check result normal?
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Check and repair the engine itself.
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- Check valve clearance (Refer to GROUP 11G - On-vehicle Service - Valve Clearance Check and Adjustment ).
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Q.
Is the check result normal?
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Adjust the valve clearance.
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- Refer to Actuator Test Reference Table (Refer to ).
- Item 15: Injector No. 1
- Item 16: Injector No. 2
- Item 17: Injector No. 3
- Item 18: Injector No. 4
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Q.
Are the check results normal?
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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 ).
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- Check injector itself (Refer to ).
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Q.
Is the check result normal?
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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 ).
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Q.
Does trouble symptom persist?
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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 ).
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
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