Fault-Tracing

Fault-tracing

Checking the status




- Ignition on.
Check whether the fault is permanent or intermittent by reading off the signal from the fuel pressure sensor.
Check that the signal is within its permitted range. The signal is measured in the fuel rail for the injectors.
The fault is permanent if the signal is incorrect.
The fault is intermittent if the signal is correct.










Continue - Checking components and wiring

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Checking components and wiring

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

Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.
Check the fuel pressure sensor resistance. Take readings between terminals #1 and #2.
Check the signal cable between control module terminal #A3 (#A3) and fuel pressure sensor terminal #2. Check for a short-circuit to supply voltage. Check for an open-circuit.
Check the ground lead between control module terminal #A60 (#A60) and fuel pressure sensor terminal #1. Check for an open-circuit.
Remedy as necessary.

Other information:
- Checking wiring and terminals Checking Wiring And Terminals
- For resistance values, see Component specifications Specifications
- To connect the breakout box, see Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box
- For information about signals, see Signal specification Signal Description / Specification
- To access or replace the fuel pressure sensor, see Fuel pressure sensor, replacement, B5244T5, B5254T2 Service and Repair.














Continue - Verification

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Verification




Verification

Verification

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




- Reinstall the connectors, components etc.
- Start the engine and run it to normal operating temperature
- Read off the fuel temperature sensor signal.
Check that the signal is within its permitted range. The signal is measured in the fuel rail for the injectors.









Is the signal OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

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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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the status

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