Signal Too High / Signal Too Low

Signal too high / Signal too low

Checking intake system
Check the intake system between the turbocharger (TC) and the throttle unit. Check for air leakage.
Check particularly that the boost pressure sensor is correctly installed and has not come loose.
Check that the non-return valve to the crankcase ventilation is positioned correctly and is not damaged.
Try a new boost pressure sensor if no fault is found during the above fault-tracing.

Other information
- Air leaks in the intake system, checking Air Leaks In the Intake System, Checking
- Non-return valve, crankcase ventilation, B5254T7 Service and Repair

Continue - Verification

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Verification




Verification

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








- Ignition off
- Reconnect the connectors, reinstall components etc.
- Test drive the vehicle on the road. Ensure that high boost pressure is reached (high load) so that the engine control module (ECM) can run the diagnostic.
- Connect VCT2000 to the data link connector (DLC) without switching off the engine.

Note! If the engine is switched off, the stored fault status will be erased and the test drive will have to be repeated.

Read off the diagnostic status and fault status for the diagnostic trouble code (DTC) by selecting the relevant diagnostic trouble code (DTC) from the list.
Check the fault status for the diagnostic trouble code (DTC) when the diagnostic is "Complete". If the diagnostic is not complete after the test drive, further test driving is required. If the function is correct, the fault status must be "No fault found" when the diagnostic is complete.





Is the function 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 intake system

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