AVC-LAN Circuit between Navigation ECU and Multi-Display: Description
WARNING: This page is about a different car, the 2006 Lexus GS 430 and 2006 Lexus GS 300. 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) communicates by transferring the signals from each switch.
When +B and GND shorts occur in this AVC-LAN, the navigation system will not function normally as communication is discontinued.
In the AVC-LAN, the multi-display becomes the communication master, and the radio receiver assembly has enough resistance necessary for transmitting the communication.