A system for detecting a motion of an occupant seated in a vehicle. The system includes a sensing electrode located proximate to the occupant and configured to transmit a signal representative of a current in the sensing electrode. The system also includes a receiver including a controller and coupled to an antenna. The receiver is configured to detect a change in the transmitted signal based on a presence of the occupant and a set detection condition, and generate detection information based on the set detection condition. The controller is configured to change a state of a vehicle component based on the generated detection information.