Signal Too Low
Signal too low
Checking the status
- Start the engine and run it to operating temperature and then let it run at idle speed
- Read off the angle of the camshaft (actual value) and the its desired angle (target value).
At idle speed with the engine at operating temperature, check that the camshaft shift angle (actual value) and the desired value correspond with an accuracy of approximately 8° CA. Rev the engine a few times and check again at idle speed that the values correspond.
Hint: If this check is carried out during a road test under load, the results will be clearer because camshaft control will be more active.
The difference between the values can be read off in the lower digital display.
The fault is permanent if the values do not correspond. The fault is intermittent if the values correspond.
Continue - Checking components
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Checking components
Check the engine oil level and quality. Check for contaminants in particular.
Remove the camshaft reset valve. Check the oil ducts for the cylinder head for the camshaft reset valve. Check for blockages and dirt.
Hint: Faults may result from dirt in the camshaft reset valve. Try cleaning the valve.
Remedy as necessary.
Try a new 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
- Variable valve timing solenoid, replacing Removal and Replacement
- VVT solenoid, inspection and cleaning VVT Solenoid, Inspection and Cleaning
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.
- Start the engine and run it to operating temperature and then let it run at idle speed
- Read off the angle of the camshaft (actual value) and the its desired angle (target value).
At idle speed with the engine at operating temperature, check that the camshaft shift angle (actual value) and the desired value correspond with an accuracy of approximately 8° CA. Rev the engine a few times and check again at idle speed that the values correspond.
Hint: If this check is carried out during a road test under load, the results will be clearer because camshaft control will be more active.
The difference between the values can be read off in the lower digital display.
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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