Turn by Turn directions no voice using Bluetooth

For all you Prius owners I thought I'd share my experience. I have an iPhone 6 Plus running iOS 8.1.1. I use two navigation apps...Apple Maps and Garmin USA. I have a 2011 Prius. That was the last year BEFORE they introduced the Entune system. I don't know what my Nav system is called. My iPhone is connected to the Prius Nav system via bluetooth...I don't use USB.

I usually listen to Sirius XM in the car and want to have turn by turn voice directions cut in when necessary.

With Apple Maps, I have observed 2 modes. I have no idea what series of events causes one instead of the other.

Mode 1: The turn by turn voice directions cut in. The screen on the Nav system does nothing...it continues to show the map. The voice directions finish and Sirius XM returns. Smooth.

Mode 2: The map screen disappears and the previously mentioned "call in progress" screen appears. The voice directions are given. The "call in progress" screen disappears and the map screen reappears. When this "call in progress" mode occurs I notice that a small couple second delay before I hear the directions. I believe this is the time it takes to activate that "call in progress" mode. This may not seem like a big deal, but in a busy city that couple second delay can mean missing your turn. It's a pain and I wish I could figure out how to always enjoy Mode 1.

With Garmin USA, I can get turn by turn voice directions only via Mode 2. Again, not bad...but that couple second delay can be problematic.

Why do these cars employ this "call in progress" functionality? Any insights.

BTW, if you're wondering, the Nav system on my Prius works fine. So, why do I bother with my iPhone? Well, I don't have an extensive address book entered into my Nav System. So, to get somewhere I often have to manually enter the address first. On my iPhone, I have been conscientious about entering the address of almost every person and business in my contacts app. Both Apple Maps and Garmin USA can access my contacts for the addresses. That makes things easier when I am rushed or just feeling lazy. Having said that, the Prius turn by turn voice directions work flawlessly and with no delay.

Interesting how this works for some and not for others. I have a 2008 Toyota Tundra and turn by turn don't work with Apple Maps BUT Google Maps works. Siri Works as well. Wish I knew why.

I had the same problems in a 2012 Toyota Tundra. Here is how I got it to work:

Hope in your vehicle and connect up with the vehicle's audio system via bluetooth. Then open up the maps app and program in a destination. At the bottom right corner you can open up some settings and in here there will be settings to play the audio over the bluetooth connection. Make sure thats turned on. I am now able to get the directions over the bluetooth audio even when I'm listening to FM or XM radio.

Hope this helps someone!

My new iPhone SE won't give turn by turn directions with Map unless the radio is turned on. With my 5s I received turn by turn directions plugged into media interface and I didn't have to have the radio turned on. Very strange.

It works with Bluetooth but on a long trip I like the phone plugged in so that it stays charged.

Anyone else?

Theres the answer right there!! Thank you fitter328 and Roman. SOLVED