Signal Too Low

Signal too low

Checking components and connections
Check the signal cable between fuel pressure sensor terminal #4 and engine control module (ECM) terminal #A19 (#A19). Check for a short-circuit to ground.
Check the engine control module (ECM) and fuel pressure sensor connectors. Check for contact resistance and oxidation.
Remedy as necessary.

Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- For information about signals, see Signal specification Signal Description / Specification
- To access and replace the fuel pressure sensor, see Fuel pressure sensor, replacement 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.
- Start the engine.
Activate reading off the voltage from the fuel pressure sensor.
Check that the voltage is between 0.5 V and 4.5 V. Check that the voltage is not constant at throttle opening.





Is the value within its permitted range?

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 components and connections

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