3.
Select the “CVVL correction value manual learning” menu in Vehicle S/W Management - ID registration on GDS.
After replacing the engine assembly, ECU or any parts related with CVVL system, which can cause the valve lift variation, the manual learning or automatic learning for CVVL valve lift adaptation values should be performed.
In case the mechanical valve lift variation is within the normal range, the self-learning can be performed during driving the vehicle even if the manual learning or automatic learning has not been performed. But the self-learning performs learning at different speed depending on diving conditions.
To compensate for mechanical variations of CVVL valve lift, enter the CVVL CODE 12 digit on the bar code label attached to the engine cylinder head cover to the ECU through a diagnostic equipment.
CVVL CODE is the valve lift variation information of the engine assembly precisely measured in an engine assembly plant. Thus, when replacing the cylinder head assembly, the intake camshaft, intake valve and etc. the CVVL valve lift variation changes so the bar code label attached to the cylinder head cover should be removed. In addition, when replacing the cylinder head cover, remove the existing bar code label from the head cover and attach it to the new head cover.
Manual learning is necessary when;
Engine assembly replacement
ECU replacement
Manual learning is more accurate calibration than automatic learning so the manual learning should be carried out if the CVVL CODE is available. In case the bar code label is removed or damaged then the CVVL CODE is not available, perform the automatic learning.
Connect the GDS to the vehicle.
Turn the ignition switch ON (not running).
Select the “CVVL correction value manual learning” menu in Vehicle S/W Management - ID registration on GDS.
Perform the manual learning for CVVL Valve Lift Adaptation according to the procedure displayed on the GDS.
Automatic learning using a diagnostic equipment compensates for mechanical variations of CVVL valve lift.
Automatic learning is necessary when;
Cylinder head assembly, intake camshaft or intake valve replacement
The bar code label is removed or damaged then the CVVL CODE is not available
Connect the GDS to the vehicle.
Start the engine.
Select the “CVVL correction value automatic learning” menu in Vehicle S/W Management - ID registration on GDS.
Perform the automatic learning for CVVL Valve Lift Adaptation according to the procedure displayed on the GDS.
