A vehicular vision system includes an electronic control unit disposed at a vehicle, and a camera disposed at the vehicle. The electronic control unit includes an image processor. The camera has an imager that captures image data. A cable is electrically connected (i) at an electrical connector of the electronic control unit and (ii) at an electrical connector the rear backup camera. The cable carries DC power from the electronic control unit to the camera. The cable carries, from the electronic control unit to the camera, data used for control of the imager of the respective camera. The cable carries image data captured by the imager of the camera to the electronic control unit. Image data carried by the cable to the electronic control unit is processed at the electronic control unit.