Rotation Rate Sensor
The rotational rate sensor is mounted under the driver's seat. It provides a signal to the DSC control module that corresponds to the vehicle's rotational speed around its axis (yaw speed).
The sensor receives its operating power (5 volts) from the DSC control module and provides an output voltage of approx. 0.25 to 4.65 volts depending on the amount of yaw exerted on the vehicle.
The sensor operates on the Coriolis effect to produce the output voltage. The element of the sensor is a micromechanical double quartz tuning fork. A frequency of 11 Hertz is applied to one side of the fork and as the vehicle turns on its axis, vibrations are induced into the tips at the other end.
The sensor processes the signals produced by the fork and produces an analog voltage signal that is proportional to the amount of yaw.
Based on the control module's programming parameters, the DSC will activate a DSC regulation cycle to ensure that the vehicle remains stable under all driving conditions.