Hey all, I posted about this before, but feel like I left out parts in the description of the issues I am having. I recently bought a 2004 LX470, and the nav/hvac system is filled with gremlins. When you start it, the screen goes through its boot-up process and then just isn't responsive. When you press the MAP button, it says "The external system is not connected." If you press the climate button, you get "Check the connection of the air conditioner." The whole time, the radio buttons work, and will change stations or change to tape or CD, but the screen does nothing. The climate system runs the entire time, but you can't change anything. Occasionally (sometimes after a couple minutes, sometimes after driving an hour) the system will come to life and I can change the climate and use the screen, but it's only occasional and only for a couple minutes normally. I have the climate set to 70 and AUTO, so the AC works and if its cold enough the heat works. I checked fuses, I cleaned all the connections and checked the wiring, everything visually looks great. Any suggestions would greatly appreciated!
