The Wheel Speed Sensors are receiving an ignition signal from the EBCM (Electronic Brake Control Module). In turn, the sensors send a square wave signal to one of the control modules that require it, which is used by the controller to calculate the speed at which the wheel is spinning. Once the wheel starts turning, the sensor proceeds to produce the signal that determines the speed of the vehicle.
A wheel speed sensor is a hall effect sensor, which has at its disposal a reluctance wheel, which when it moves creates interruptions of the magnetic field. This causes a series of pulses to be produced, which are observed and interpreted by the EBCM as the speed.
When the diagnostic code C0050 OBD2 is set, it means that a malfunction has been found in the right rear wheel speed sensor circuit.