Signal Too High. Permanent Fault

Signal too high. Permanent fault

Checking the boost pressure sensor signal




- Ignition on
- Read off the boost pressure sensor and atmospheric pressure sensor values
- Check that the boost pressure sensor value is within 200 mbar of the atmospheric pressure sensor value. The atmospheric pressure sensor value is used as a reference value for this test.
Select one of the following alternatives to continue:
1. The boost pressure sensor value is more than 200 mbar higher than the atmospheric pressure sensor value
2. The boost pressure sensor value is approximately the same as the atmospheric pressure sensor value.










1 - Checking the wiring

2 - Checking the connectors and the boost pressure system

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Checking the connectors and the boost pressure system




- Ignition off.
Check the boost pressure sensor connector for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Release the boost pressure control (BPC) valve according to Checking and adjusting the boost pressure control (BPC) valve on the turbocharger (TC) Adjustments. Check that the boost pressure control (BPC) valve does not stick in the closed position.
Check the turbocharger (TC) according to Checking the turbocharger (TC) Checking The Turbocharger. Check in particular the hoses and the function of the pressure regulator.
Remedy as necessary.













Select Continue.

Continue - Verification

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Checking the wiring




- Ignition off.
Check the boost pressure sensor connector for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the signal cable between boost pressure sensor terminal 3 and control module terminal 13 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault and the ground lead between boost pressure sensor terminal 2 and control module terminal 73 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.

Other information
- To connect the breakout box, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000
- For information about signals, see Signal specification EMS2000.









Select Continue when the fault has been remedied.

Continue - Checking the boost pressure sensor signal

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Checking the boost pressure sensor signal




- Reinstall the connector
- Ignition on.
Read off the boost pressure sensor and atmospheric pressure sensor values.
Check that the boost pressure sensor value does not deviate from the atmospheric pressure sensor value by more than 200 mbar. The atmospheric pressure sensor value is used as a reference value for this test.
Try a new boost pressure sensor if the boost pressure sensor value does not correspond to the atmospheric pressure sensor value to an accuracy of 200 mbar.









Select Continue when the fault has been remedied.

Continue - Verification

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Verification




Verification

Verification

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




- Test drive the car with changing throttle opening and at constant throttle opening. This will ensure that the boost pressure system operates throughout the entire range
- Connect the VIDA station
- Ignition on
- Check if the diagnostic trouble code (DTC) status has changed to intermittent. If it has, the fault has been remedied.





Has the status of the diagnostic trouble code (DTC) status changed?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - 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 - FAULT-TRACING FAILED

No - Attempt New Test

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Attempt New Test - Checking the boost pressure sensor signal

FAULT-TRACING FAILED - No Fault Found

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