Fault Tracing

Fault tracing

Checking the status




- Start the engine.
Check whether the fault is permanent or intermittent by reading the signal of the fuel temperature sensor. Check that the value is feasible.

Hint: The signal is measured in the injector delivery pipe and is thus affected by engine temperature.

If the value is not feasible, the fault is permanent. If the value is feasible, the fault is intermittent and not currently active.





Continue - Checking components and wiring

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Checking components and wiring




- Ignition off

Hint: The fuel temperature sensor is integrated in the fuel pressure sensor.

Check the fuel pressure sensor connectors and connections for contact resistance and oxidation.
Remedy as necessary.

Other information
- Connecting the breakout box, B6304T4 Breakout Box Connection, Engine Control Module (ECM)
- Signal specification, B6304T4 Signal Description, Engine Control Module (ECM)
- Checking wiring and terminals Checking Wiring And Terminals









Continue - Verification

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Fault-tracing information

Attempt New Test - Checking components and wiring

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on
Read off the fuel temperature sensor signal by clicking on the symbol for VCT2000.
Check that the signal is within its permitted range. The signal is measured in the injector delivery lines as the signal is affected by the engine temperature.





Is the signal within its permitted range?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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