I've got a 2015 GX, about a month ago the stereo system stopped working and went into this reboot loop where it would start up and get to the caution screen the turn off and repeat. We decided to unplug the battery to try rebooting the system. However when we turned it on the screen was black and said "map disc reading in progress" followed by "a program cannot be read, please consult to a dealer". Took it to the dealer they said the system is fried and that this happens after you unplug the battery so many times and they want 2,400 to fix it. I don't think they even took the dash apart to look at the wiring, I'm guessing they tried to reload the map disc and it didn't work so they came to the conclusion the system is fried? I will mention the back up camera still works as does the temperature control buttons under the screen. I'm not super tech savvy but am trying to do some research into this and avoid paying that ridiculous cost for replacing it. Any insight, guidance or advise is greatly appreciated!

 

This also happened to me on my 17 ES350 Bought a used control unit off Ebay