Clutch-Less System
WARNING: This page is about a different car, the 2008 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
A clutch-less system is used to mechanically link the front wheels and MG2 via gears. To disengage the motive force in the neutral position, the shift position sensor outputs an N position signal to turn OFF all the power transistors in the inverter (which controls MG1 and MG2). As a result, the operation of MG1 and MG2 shuts down, thus rendering the motive force at the wheels to zero.