Car Play issues fixed finally and for good !!!

[boldram]

If you plug your phone into the front media hub for CarPlay and no car play pops up AND your phone is cycling on/off/on/off/on/off, charging on off on off.....or your carplay comes and goes.
Take your phone to another truck and try, if your phone works on another vehicle it means that your phone setting are OK and your cable is OK.
Dealer will try to convince you that it is your phone; do not listen, test on another vehicle with CarPlay.
After two visits dealer was convinced that front hub needs to be replaced and i new that it is not gonna help. After a new front media hub same problem.
Back to the dealer yet another diagnostic done, this time they figured out that REAR media hub weak electrical connection. Removed center console, Re-plugged harness connected into RAER media hub and NO ISSUES with car play. Apparently front and rear media hubs are in loop and when either one looses connection neither will work. Why rear hub lost good connection no clue, may be bumpy road as dealer said or may be your kids plugging and unplugging phones and iPads 10,000,000 times.
RAM media hubs are $50 on Ebay. Don't go to a dealer waist of time, 2-3 visits. I literally spent 3 4 Saturdays at a dealership. DIY way to go

 

[Jmac509]

This is good to know!

Thanks for sharing!

 

[theblet]

Thanks for the tip!

 

[cpetku]

If you plug your phone into the front media hub for CarPlay and no car play pops up AND your phone is cycling on/off/on/off/on/off, charging on off on off.....or your carplay comes and goes.
Take your phone to another truck and try, if your phone works on another vehicle it means that your phone setting are OK and your cable is OK.
Dealer will try to convince you that it is your phone; do not listen, test on another vehicle with CarPlay.
After two visits dealer was convinced that front hub needs to be replaced and i new that it is not gonna help. After a new front media hub same problem.
Back to the dealer yet another diagnostic done, this time they figured out that REAR media hub weak electrical connection. Removed center console, Re-plugged harness connected into RAER media hub and NO ISSUES with car play. Apparently front and rear media hubs are in loop and when either one looses connection neither will work. Why rear hub lost good connection no clue, may be bumpy road as dealer said or may be your kids plugging and unplugging phones and iPads 10,000,000 times.
RAM media hubs are $50 on Ebay. Don't go to a dealer waist of time, 2-3 visits. I literally spent 3 4 Saturdays at a dealership. DIY way to go

If there was an intermittent connection to the rear hub, the head unit might try resetting the bus as part of its usb recovery strategy. The standard implementation would be to only reset the port it's connected to on the upstream (front) hub. An exception would be if the downstream hub caused the upstream hub to babble in which case the head unit would reset the bus. The only proper way to debug is with a usb sniffer. Dealers and most oem's are not capable of debuging at this level.