Slow/Faulty

Slow/Faulty

Checking the status

Hint: Diagnostic trouble code (DTC) may be caused by a damaged fuse. If the engine does not start, check the fuse for the power supply to the camshaft reset valve.




- Start the engine
- Read off the value for the camshaft shift angle and the desired value for the camshaft shift angle
- Active the quick test of camshaft control by clicking the start button
- Increase the engine speed (RPM) to approximately 2500 rpm and keep the engine running at this speed.
When the engine speed (RPM) increases, the control module will start the quick test to control the shift angle of the camshaft to the different target values. There is a fault if the control module does not operate the camshaft shift angle to the different target values.
During the quick test, check that the shift angle of the camshaft (actual value) corresponds to the target values to an accuracy of ±10°. If the shift angle of the camshaft (target value) does not change, or if the actual value does not correspond to the target value, the function is faulty.
Deviation between the values can be read off in the lower display.
Carry out the check for approximately 15 seconds at an engine speed (RPM) of 2500 rpm. The test is completed when the shift angle of the camshaft returns to 0°. To restart the test, let the engine return to idle speed, then increase the engine speed to approximately 2500 rpm.
The fault is intermittent if the function is OK.

Note! The test is active until the ignition is switched off. Switch off the ignition before the vehicle is delivered to the customer.






Continue - Checking components

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Checking components
Check the level and quality of the engine oil. Check for contaminants in particular.
Check the engine oil pressure.
Remove the camshaft reset valve. Check the oil ducts for the cylinder head for the camshaft reset valve (intake) for blockages and dirt.

Hint: The fault can be caused by contaminants in the camshaft reset valve. Try cleaning the valve.

Remedy as necessary.
Try a new intake camshaft reset valve if the above remedy does not solve the fault.

Hint: The fault may also have been caused by an internal fault in the variable valve timing unit. The variable valve timing unit may be damaged if the above fault-tracing and corrective action do not remedy the fault.

Other information:
- Checking oil pressure, B5244T5, B5254T2 Checking Oil Pressure
- VVT solenoid, inspection and cleaning VVT Solenoid, Inspection and Cleaning
- Variable valve timing solenoid, replacing [1][2]Removal and Replacement
- Camshaft seal/variable valve timing (VVT) unit, replacing Camshaft Seal/Variable Valve Timing (VVT) Unit, Replacing






Continue - Verification

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Verification




Verification

Verification

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




- Start the engine
- Read off the value for the camshaft shift angle and the desired value for the camshaft shift angle
- Active the quick test of camshaft control by clicking the start button
- Increase the engine speed (RPM) to approximately 2500 rpm and keep the engine running at this speed.
When the engine speed (RPM) increases, the control module will start the quick test to control the shift angle of the camshaft to the different target values. There is a fault if the control module does not operate the camshaft shift angle to the different target values.
During the quick test, check that the shift angle of the camshaft (actual value) corresponds to the target values to an accuracy of ±10°. If the shift angle of the camshaft (target value) does not change, or if the actual value does not correspond to the target value, the function is faulty.
Deviation between the values can be read off in the lower display.
Carry out the check for approximately 15 seconds at an engine speed (RPM) of 2500 rpm. The test is completed when the shift angle of the camshaft returns to 0°. To restart the test, let the engine return to idle speed, then increase the engine speed to approximately 2500 rpm.

Note! The test is active until the ignition is switched off. Switch off the ignition before the car is delivered to the customer.





Is the function OK?

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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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the status

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