I'm having similar issues. My radio was not starting in the morning, I think because of the cold. Was able to finally get it to accept and update, hoping it would fix the problem. NO SUCH LUCK. I got the message again that it was searching for a USB to do an update so I plugged in the USB and now it is stuck in a loop between Insert USB and the Wait 2-5 minutes. Woke up this morning with a dead truck. It tried to run the update all night long. Can't get it to find the USB now. is there a way to just get the "head unit" to just turn off so i don't kill my battery?
I know that this thread is quite old, but I though perhaps this could help someone.
The issue started when one day I went to drive to work and my 8.4 with nav. was just black like a dead screen. A few minutes later, a dark screen with a red outline popped up saying there was a problem starting the application software and try to start using the USB port or something like that. I don't remember exactly what it said. I checked the Uconnect website, and saw I was due for an update so I downloaded everything and got my update USB stick ready. Since the radio was stuck on that red outlined screen, as soon as plugged in the USB stick, it asked if I wanted to update the software by leaving the update USB stick installed, and that the update would begin automatically in 30 seconds. The update appeared to begin just fine, but after a minute or two, that is when this issue began.
I had the EXACT same problem. The loop between the dark "wait 2-5 minutes" and the light "insert update in USB" message screens. The loop will not stop, even when truck is turned off. The unit will continue to cycle between these two screens and drain the battery unless the head unit fuse (20 amp located all by itself under the master cylinder) is pulled, or the battery is disconnected. Regardless of how long you remove the fuse, or disconnect the battery, the head unit remains locked in this loop when it is powered back on.
Here is how I fixed this problem:
1) Remove the USB stick you are using for the update that has these two files:
SWDL.ISO
SWDL.UPD
2) Delete the file SWDL.ISO
3) Re-Install the USB stick that has ONLY the file:
SWDL.UPD
4) You will see the dark "Wait 2-5 Minutes" screen one last time, but when it would normally cycle to the light "Please insert update in USB" screen, it will actually begin the update process.
Hope this helps.
