Signal Too Low

Signal too low

Checking for air leakage




- Ignition off.
Check the intake system for air leakage and loose charge-air pipe.
Air leakage in the intake system, checking, B5244T5, B5254T2 Air Leaks in the Intake System, Checking

Does the problem persist?

Yes - Checking hoses and the turbocharger (TC) control valve

No - Verification

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Checking hoses and the turbocharger (TC) control valve
Check the turbocharger (TC) control valve by activating it. The turbocharger (TC) control valve must click when it is activated.
Check the setting of the pressure servo for the boost pressure control (BPC) valve. Check the boost pressure control (BPC) valve. Check that the pressure servo and the boost pressure control (BPC) valve are functioning correctly and are not sticking: Wastegate valve, adjusting, B5254T2 Wastegate Valve, Adjusting

Other information
- Replacing the turbocharger (TC) control valve, B5244T5, B5254T2 Service and Repair
- Quick check, turbocharger (TC), B5244T5, B5254T2 Testing and Inspection
- Turbocharger (TC), replacing, B5254T2 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 for air leakage

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