Signal Too Low

Signal too low

Checking components and wiring




- Ignition off.
Check the signal cable between control module terminal #A23 (#A23) and boost pressure sensor terminal #4. Check for a short-circuit to ground.

Hint: With the ignition on and the boost pressure sensor connector disconnected, the voltage between terminal #4 and the ground terminal should be approximately 5 V.

If no errors are found and the fault is permanent, replace the boost pressure sensor.
Remedy as necessary.

Other information:
- To connect the breakout box / access the control module, see Connecting the breakout box, B5254T2 Connecting the Test Box
- To access or replace the boost pressure sensor, see Temperature and pressure sensor, replacing Service and Repair
- For information about signals on 5 cylinder engines, see Signal specification Signal Specification
- For information about signals on 6 cylinder engines, see Signal specification Signal Specification
- 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
- Reinstall the connectors, components etc.
- Ignition on
- Read off the boost pressure sensor signal.
With the ignition on the voltage should be approximately 1.9 V.





Is the signal OK?

Yes - Verification completed

No - 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 - Exit Fault-Tracing

No - Attempt New Test

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Attempt New Test - Checking components and wiring

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