Signal Too High/Signal Too Low

Signal too high / Signal too low

Checking hoses and the turbocharger (TC) control valve
Check particularly that the boost pressure sensor is correctly installed and has not come loose.
Check the intake system for air leakage. Check in particular the hose between the turbocharger (TC) and the throttle unit.
The boost pressure sensor is damaged if no fault is found in the above fault-tracing.

Other information:
- Check for air leaks in the intake system Air Leaks in the Intake System, Checking
- Temperature and pressure sensor, replacing Service and Repair.

Continue - Verification

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Verification




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 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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking hoses and the turbocharger (TC) control valve

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