So I have a 5000NEX and it's running the latest firmware. I also have an iPhone 6 and use CarPlay
Sometimes , well 3 times this has happened. I'll be listening to something on my SD card, and I'll get a text, or another type of notification on my iPhone. That's when it starts. It's like a test tone that starts in the left speaker, goes to the right, then the rear L and R. I have the rears turned off on the HU!!! Unplugging the phone does not solve it. I have to turn the unit off and on. Want to know who I have to do that? I have to shut my truck off and turn it back on. That sucks