Background: I have a Gen 4 Ram: 2019 Ram 1500 Classic and my issue was that Android Auto app quit working when plugged in via USB cable to the Truck, I would get the message:
- Connect a Device (after connecting Android Phone via USB) like I normally do I would receive this message:
- Device not Supported
So, I called Sirius XM Guardian and they had me reset my truck's "system" by doing the following procedure:
1. Park vehicle in safe location and turn it off completely: engine not running, dashboard lights off.
2. Close all doors.
3. Start ACC mode only; do NOT start engine.
4. If your vehicle is Keyless (no key) do the following: Without touching pedals, press Start button twice otherwise skip this step.
5. Simultaneously press and hold Phone and VR buttons for 30 seconds, then release.
6. Turn off ACC mode.
7. Open driver door for 30 seconds or until all dashboard indicators go off.
8. Close driver door.
9. Restart vehicle.
10. Test app.
I did the 9 steps above (#4 was Not Applicable) and the app started working with the truck. Also note, I could not Uninstall "Android Auto" app (it came with the phone) however, I did find a new app on Google Play called, "Android Auto for phone screens". Android Auto for phone screens appears to be the replacement for the old Android Auto (not sure) because Android Auto no longer appears on my phone except in the App Manager window where you can Force Stop and/or Disable it. It was not until I installed "Android Auto for phone screens" app that I could see it on my truck and it looked just like the old Android Auto app. Just wanted to contribute to the knowledge base so hope it helps. Also, Sirius XM Guardian says they had nothing to do with the problem however this all happened the day that my Sirius XM Guardian subscription was cancelled.