If your unit is an international version, or if a previous owner has already modified it, you might be able to change the language through the standard Graphical User Interface (GUI). The challenge here is navigating Japanese menus.
Note: This blind method works for firmware version 2.0 and above. If it doesn't work, rely on the icon method above. eclipse avn-z03i change language
Before diving into the button presses, it is important to understand what you are looking at. The AVN-Z03i runs on a proprietary Fujitsu Ten (now Denso Ten) operating system. Unlike smartphone-based systems, there is no "Language" icon sitting on the home screen. If your unit is an international version, or