A controller may generate a packet, and send the packet to an electronic control unit. The packet includes a plurality of bits and control information. The plurality of bits may indicate whether the electronic control unit controls a plurality of objects (for example, actuators or functions) based on the control information. The plurality of bits are in a one-to-one correspondence with the plurality of objects. In this way, the electronic control unit associated with the plurality of objects can control the plurality of objects based on the control information.