Circuit Description
WARNING: This page is about a different car, the 2003 Toyota Matrix and 2003 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
When engine speed reaches 6200 RPM, Variable Valve Timing and Lift (VVTL) system switches locker arm from low speed to high speed. ECM controls Oil Control Valve (OCV) to apply hydraulic pressure to piston in locker are and switch locker arm by locking slipper for high speed.