AVC-LAN Circuit: Description
WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
All audio system units that are connected to the AVC-LAN (communication bus) use it as the communication line by which they transmit switch signals.
When a +B short or GND short occurs in the AVC-LAN, the audio system fails to function normally, due to the discontinuation of communication.
In the AVC-LAN, the radio receiver assembly is the main communication center and has the correct resistance necessary for transmitting communication signals.