The yaw rate sensor is a diapason type built into the VSA system that generates a voltage signal each time there is a change in the horizontal axis. The yaw rate sensor uses the voltage signal generated whenever the diapason vibrates during vehicle cornering.

Whenever the vehicle accelerates or decelerates, the movable electrode shifts position and the capacitance between the movable and fixed electrode changes. Acceleration/ Deceleration are thus detected by the change in capacitance.