Signal Too High. Permanent Fault

Signal too high. Permanent fault

Checking connector








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

Other information

- To access/replace the boost pressure sensor, see Manifold absolute pressure (MAP) sensor, replacing, B5234T9, B5244T7 Removal and Replacement.









Is the signal OK?

Yes - FAULT FOUND

No - Checking wiring and components

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Checking wiring and components
Check signal cable between control module #A23 (#A23) and boost pressure sensor #1 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault

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

Check ground lead between control module #A60 (#A60) and boost pressure sensor boost pressure sensor #2 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Remedy as necessary.

Other information
- Connecting the breakout box/accessing the control module, see Connecting the breakout box, B5234T9, B5244T7 Connecting The Breakout Box.
- To access/replace the boost pressure sensor, see Manifold absolute pressure (MAP) sensor, replacing, B5234T9, B5244T7 Removal and Replacement.
- For information about signals, see Signal specification Signal Specifications.














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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking connector

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