Smart Tailgate system is an electro-mechanical system that can open and close the tailgate automatically, by using local switch (overhead console switch, push button switch inside of the tailgate, and outside handle switch), and wireless remote key (FOB), or can halt the tailgate. The Smart Tailgate module (STGM) sends and receives the vehicle’s information via BCM, instrument panel, SJB and CAN communication, so that it can decide the opening/closing of the tailgate and self diagnosis.