Circuit Description
WARNING: This page is about a different car, the 2003 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
VVT system controls intake valve timing to proper timing in response to driving condition. ECM controls Oil Control Valve (OCV) to make intake valve timing properly, oil pressure controlled with OCV is supplied to VVT controller, and then VVT controller relative position between camshaft and crankshaft. See Fig 1. If DTC is set, an open or short is present in oil control valve circuit. Check for an open or short in OCV circuit, OCV or ECM.