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Q.
Is any other diagnosis code than P0088 set?
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Inspection chart for diagnosis codes (Refer to ).
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- Suction control valve connector check.
- Check suction control valve itself (Refer to ).
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Q.
Is the check result normal?
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Repair or replace the connector, or replace the suction control valve.
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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 or replace the connector, or 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 or replace the connector, or repair the damaged harness wire then replace
the common rail assembly and fuel injection tubes.
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- Use special tool test harness (MB991658) to connect connector, and measure
at pick-up harness.
- Engine: Idling
- Connect the oscilloscope special patterns pickup to terminal engine-ECU SCV+ line
and body earth.
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OK: The waveform should show a pattern similar to the illustration of inspection
procedure using an oscilloscope (Refer to ).
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Q.
Is the check result normal?
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Replace the suction control valve.
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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 the trouble symptom persist?
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