Hi, I have a pioneer Avhx8850bt unit and can’t get CarPlay working with my iPhone 7 connected via USB

SOURCE: I have the pioneer DEH-P7000UB

error 19 is a communication error code with the ipod itself so either the cable is bad or the connectiontion on the ipod or deck is bad or the ipod itself may have a bad rom for external use. this info comes straight from the tech support manual for Pioneer that we car audio techs use (even if you call pioneer they will tell you mthe same thing).

try this :

Disconnect the cable from iPod.
Once iPod main menu is displayed, connect the cable again.
Reset the iPod.

SOURCE: pioneer dv-400v via ethernet?

No, it is not possible to connect a personal computer to the DVD player.
http://www.manualnguide.com/dl/4791/ Page 31

SOURCE: hi,my printer/scanner scx-4200 will not scann

Wireless scanning is not a supported feature in the SCX-4200.

Thanks adi

SOURCE: Iphone connection via usb

You can connect with a 35mm jack from the headphone socket to the aux port. This works but obviously you won't get the details of tracks on the radio screen.

SOURCE: Trying to play Pandora radio

I have the same problem. Used to work even on Iphone 4 and suddenly it just stopped working about 10 days ago. Very strange as i have not updated my iphone (I'm on Version 4.02). My Denon dock is ASD-3W (wifi) connected to Denon 3808CI.
Any info appreciated.