Signal Missing

Signal missing

Checking the status




- Ignition on.
Check whether the fault is permanent or intermittent by reading off the signal from the fuel pressure sensor.
With the engine at operating temperature and idling, the signal must be approximately 400 kPa.
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
Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.
Check the signal cable between engine control module (ECM) terminal #A2 (#A2) and fuel pressure sensor terminal #4. 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.
Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

Other information:
- Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box
- For information about signals for 5 cylinder engines: Signal specification Signal Description / Specification
- For information about signals for 6 cylinder engines: Signal specification Signal Description / Specification
- For resistance values: Component specifications Specifications
- Fuel pressure sensor, replacement, B5244T5, B5254T2 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.




- Reinstall the connectors, components etc.
- Start the engine and run it to normal operating temperature
- Read off the fuel pressure sensor signal.
Check that the fuel pressure is approximately 400 kPa with the engine idling at operating temperature.









Is the fuel pressure correct?

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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