AVC-LAN Circuit: Description
WARNING: This page is about a different car, the 2008 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
Each audio system component connected to the AVC-LAN (communication bus) transfers switch signals by the audio visual communication local area network.
When a short to +B or short to ground occurs in this AVC-LAN, the audio system will not function normally as communication is stopped.