Signal Too Low

Signal too low

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.









Continue - 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.
Adjust the camshaft settings.

Note! The camshafts must be adjusted using the adjustment tool for the camshafts and crankshaft in the prescribed manner.

Other information:
- 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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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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