My google maps voice is playing from my cell phone when I am away from my car (walking down the street). When my car is ON, the voice does not play from either the cell phone or the car speakers. NOTE: I have Android Auto on my phone and car. I went into Google Maps settings on my cell phone and I get the same result whether I have voice enabled over Bluetooth or disabled. I also would note that the speaker on Google Maps on my cell phone is ON and not muted.