AVC-LAN Plus Circuit: Description
WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.
The navigation system (for HDD) uses AVC-LAN plus communication between components when performing sound library recording, and when displaying the satellite radio traffic information screen If a +B short, ground short, or other malfunction occurs in the AVC-LAN plus circuit, communication is stopped and the system does not operate normally