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Q.
Is any other diagnosis code than P0088 output?
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Inspection chart for diagnosis codes
(Refer to ).
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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 assembly.
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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Q.
Is the check result normal?
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Repair
or replace the connector then replace the common rail assembly and fuel
injection tubes.
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- Check power supply line for open/short circuit and damage.
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Q.
Is the check result normal?
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Repair
the damaged harness wire then replace the common rail assembly and fuel
injection tubes.
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- Check output line for open/short circuit and damage.
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Q.
Is the check result normal?
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Repair
the damaged harness wire then replace the common rail assembly and fuel
injection tubes.
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- Engine: Idling
- Connect the oscilloscope special patterns pickup to engine-ECU
terminal No. 37 and earth.
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OK: Output waveform timings of both
sensors are the same as the check procedure (Refer to ) using an
oscilloscope.
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Q.
Is the check result normal?
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Replace the supply pump assembly then
replace the common rail assembly and fuel injection tubes. 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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- After replacing the common rail assembly and fuel injection tubes,
re-check the trouble symptoms
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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 supply
pump, learn the supply pump (Refer to GROUP 00 - Precautions Before
Service - What The Common Rail Engine Learns ).
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