No sound iPhone navigation

hello,
When I plug my iPhone into the usb to use navigation (I use my phone because the nav system sucks in the Tacoma) no sound comes through my speakers or iPhone. The nav on phone works just no sound. Any advice would be appreciated. Thanks

 

I know that you connect via usb, but try turning bluetooth on phone and your truck before connecting

 

Touch the map screen and you will get an icon for speaker. Then check that the speaker is not turned off (slash through speaker icon)

 

Thanks! I’ll try both

 

If you have the anytime camera mod, that can cause bluetooth issues too where the head unit acts like its playing, but there is no audio coming from the speakers.
If you start the car with the camera switched on, i have found that upon switching back to the regular view, there will be no output from the speakers, not even beeps.
If i turn off the car and leave the anytime camera off, and the head unit boots, audio will play correctly and i can switch between the cameras and the radio with no audio problems.