AVC-LAN Circuit: Description
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
Each unit of the navigation system connected to the AVC-LAN (communication bus) transfers the Switch signals by communication
When a short to +B or short to ground occurs in this AVC-LAN, the navigation system will not function normally as communication is stopped.