Circuit Description
WARNING: This page is about a different car, the 2003 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
This is the procedure of the oil control valve (OCV). The VVT system controls the intake valve timing properly according to the driving condition. The engine control module (ECM) controls the OCV to make the intake valve timing properly, and oil pressure controlled with OCV is supplied to the VVT controller. And then the VVT controller changes relative position between the camshaft and the crankshaft.