Signal Too High
Signal too high
Checking the status
- Start the engine and run it to normal operating temperature
- Read off and note the adaptation value for the camshaft at idle speed. The value must be between -8° and +8°.
If the adaptation value is correct (between -8° and +8°) the fault is intermittent. If the adaptation value is incorrect (lower than -8° or higher than +8°), the fault is permanent.
Is the adaptation value correct?
Yes - Intermittent fault
No - Checking components
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Checking components
For variable valve timing control to operate correctly the engine oil must be at the correct level, of the correct quality and not contaminated.
Check the engine oil level and quality. Check for contaminants in particular.
If the adaptation value is too high (higher than +8°) when the engine is at operating temperature, the cause of the fault is probably one of the following:
- the timing belt is incorrectly seated
- incorrect base setting of the timing belt
- faulty camshaft reset valve (the slide in the valve has stuck).
Hint: First try adjusting the basic set up of the camshaft. Then read off the adaptation value for the camshaft at idle speed with the engine at operating temperature. The value must be between -8° and +8°. If the adaptation value is incorrect when the basic setting of the camshaft is correct, try cleaning the camshaft reset valve.
Note! The camshafts must be adjusted using the adjustment tool for the camshafts and crankshaft in the prescribed manner.
Try a new camshaft reset valve if the above fault-tracing does not solve the fault.
Remedy as necessary.
Hint: The fault can also be caused by a defective variable valve timing unit. The variable valve timing unit may be defective if the above fault tracing and corrective action does not remedy the fault.
Other information:
- To clean the camshaft reset valve, see VVT solenoid, inspection and cleaning VVT Solenoid, Inspection and Cleaning
- To adjust the camshaft position (CMP), see Camshaft seal/variable valve timing (VVT) unit, replacing Camshaft Seal/Variable Valve Timing (VVT) Unit, Replacing
- To replace the camshaft reset valve, see Variable valve timing solenoid, replacing [1][2]Removal and Replacement.
Continue - Verification
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Intermittent fault
If the diagnostic trouble code (DTC) for this fault is stored but the adaptation value is correct, the fault is intermittent. The cause of the intermittent fault is probably a defective camshaft reset valve.
Hint: Faults may result from dirt in the camshaft reset valve. Try cleaning the valve.
Other information:
- To clean the camshaft reset valve, see VVT solenoid, inspection and cleaning VVT Solenoid, Inspection and Cleaning
- To replace the camshaft reset valve, see Variable valve timing solenoid, replacing [1][2]Removal and Replacement
- To adjust the camshaft position (CMP), see 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 and run it to normal operating temperature
- Read off the camshaft adaptation at idle speed.
The adaptation value must be between -8° and +8°.
The function is OK if the adaptation value is correct.
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 the status
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