ES300 — NEW FEATURES 25 VVT-i (Valiable Valve Timing-intelligent) System 1) General This system controls the intake camshaft valve timing so as to obtain balance between the engine output, fuel consumption and emission control performance. The actual intake side valve timing is fed back by means of the VVT sensor for constant control to the target valve timing. Throttle Position Sensor Camshaft Timing Oil Control Valve VVT Sensor Camshaft Timing Oil Control Valve VVT Sensor Engine Coolant Temp.
Sensor ECM Mass Air Flow Meter Crankshaft Position Sensor 157EG22 ECM Crankshaft Position Sensor Target Valve Timing Camshaft Timing Oil Control Valve Mass Air Flow Meter Feedback Duty Control Throttle Position Sensor Engine Coolant Temp. Sensor Correction Actual Valve Timing VVT Sensor 157EG23