Galaxy S5 :: Why Won't Phone Start Up Android Auto On

I have a Galaxy S5 with Lollipop through AT&T and had Best Buy install my Pioneer AVH-4100NEX. I updated the Pioneer firmware, set it up to look for Android Auto on USB2, Android Auto is set to start automatically, and I have the phone and Pioneer connected via Bluetooth. However, when I plug the micro-USB into the phone, all it does is start charging; nothing pops up saying the phone isn't compatible or anything else and I don't get the Android Auto ToS message. When I pull up the AV menu on the Pioneer, neither the USB1 nor USB2 icons are lit up. I've tried plugging the phone in with and without the Android Auto application installed. I double-checked and Best Buy did plug the USB into USB2 using the USB cable from the box. USB Debugging is enabled on the phone.