Signal Too Low. Permanent Fault

Signal too low. Permanent fault

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

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

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.
- 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 - 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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