Faulty Signal

Faulty signal

Checking the status




- Start the engine to perform the diagnostic.
Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed".
The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".










Continue - Checking the connector

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Checking the connector
Check the fuel pressure sensor connector and terminals. Check for contact resistance. Check for oxidation.
Remedy as necessary.

Other information
- Pressure sensor, fuel rail (FRP) Service and Repair
- Fuel pump driver module Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals














Continue - Verification

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Verification




Verification

Verification

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








- Ignition off.
- Reinstall the connectors, components etc.
- Engine idling.
Read off the signal from the fuel pressure sensor.
Check that the signal is within its permitted range. Normal value is 480 ± 5 kPa at idle.
Read off the signal from the fuel pressure sensor with the ignition on. Check that the fuel pressure has dropped. Normally, the pressure should drop by approx. 100 kPa from the value at idle.

Note! The signal indicates absolute pressure.









Is the value 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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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking the status

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