Circuit Description
WARNING: This page is about a different car, the 2005 Lexus RX 330. However, it is still accessible from the selected car via links, so may be relevant.
Each unit of the audio system connected to the AVC-LAN (communication bus) transfers the signal of each switch by communication.
When a short to B+ or short to ground occurs in this AVC-LAN, the audio system will not function normally as the communication is discontinued.
In this AVC-LAN, the radio receiver assy becomes the master of the communication, and the radio receiver assy has a resistance necessary for transmitting the communication.