Signal Too High - Permanent Fault

Signal too high. Permanent fault

Checking the connector








- Ignition off
- Check the boost pressure sensor connector. Check for contact resistance and oxidation
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Read off the boost pressure sensor signal.
Check that the signal is within its permitted range. With the engine switched off, the voltage should be approximately 1.9 V.
If the signal is now OK, the fault was caused by poor contact in the connector.

Other information

- To access or replace the boost pressure sensor, see Temperature and pressure sensor, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals.









Is the signal OK?

Yes - Fault Found

No - Checking components and wiring

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Checking components and wiring
Check the signal cable between control module terminal #A23 (#A23) and boost pressure sensor terminal 1. Check for an open-circuit. Check for a short-circuit to supply voltage.

Hint: With the ignition on and the boost pressure sensor connector disconnected, the voltage between terminal 1 and ground terminal must be approximately 5 V.

Check the ground lead between control module terminal #A60 (#A60) and boost pressure sensor terminal 2. Check for an open-circuit.
Remedy as necessary.

Other information
- To connect the breakout box / access the control module, see Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout 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 Description / Specification
- For information about signals on 6 cylinder engines, see Signal specification Signal Description / 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.
- Reconnect connectors, reinstall components
- Ignition on.
- Read off boost pressure sensor signal.
With the ignition on voltage should be approximately 1.9 V.









Is the signal 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




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 connector

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