DTC B2815-00: C-CAN Error: General Description
WARNING: This page is about a different car, the 2021 Kia Soul. However, it is still accessible from the selected car via links, so may be relevant.
In general, multimedia devices such as video and audio are composed of a low-speed CAN (M-CAN) network that is optimized for poor connector connection of CAN bus connector, disconnection and short circuit. However, as the vehicle develops, a high-speed CAN (I-CAN) network is constructed as low-speed CAN can not cope with many cases.
In high-speed CAN, if one of the lines in the communication line is poor contacted or disconnected, communication failure occurs.