What are the reasons for CarPlay connection failure?

[VonMaria]

The reasons for CarPlay connection failure are as follows: 1. Accessory damage: Check if there is any damage or breakage on the phone data cable, and whether there are any foreign objects attached to the metal contact terminals on the USB plug and phone plug or if the surface is oxidized. 2. Poor contact: Inspect the internal condition of the USB female port on the external USB-HUB of the car's head unit for any damage, and whether the contact metal pieces can maintain good contact with the USB male plug. Check if there is any looseness in the connection between the car's head unit and the external USB-HUB. To prevent prolonged oxidation that may cause poor internal contact, you can repeatedly unplug and replug the two connectors of the wiring.