Signal Too High

Signal too high

Checking the status




- Start the engine and run it to normal operating temperature.
Check whether the fault is permanent or intermittent. Read off the signal from the fuel temperature 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 the component and wiring

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Checking the component and wiring

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

Check the fuel pressure sensor between terminals #1 and #2 (sensor side). Check the resistance.
Check the signal cable. Check for a short-circuit to ground.
Take readings between:
- Engine Control Module (ECM) #A41 (#A41) and fuel pressure sensor #2.
Remedy as necessary.

Other information
- Connecting the breakout box, B5254T7 Connecting the Breakout Box, Engine Control Module (ECM)
- Signal specification, B5254T7 Signal Specification
- Pressure sensor, fuel rail (FRP), B5254T7 Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals













Continue - Verification

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Verification




Verification

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








- Ignition off
- Reconnect the connectors, reinstall components etc.
- Ignition on.
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 value OK?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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Fault-tracing information

Attempt New Test - Checking the status

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