If your iPhone is not connecting to CarPlay, there are a few ways to troubleshoot this issue: 1. Check the USB cable. You must use the genuine Apple Lightning Cable to connect your iPhone to our USB port. Aftermarket USB cables may work sometimes, but some are meant for charging only. 2. Check if Siri is enabled on your iPhone. If Siri is not enabled, the CarPlay option will not be available on your phone. Got to Settings > Siri & Search > and turn on Press Side Button for Siri. 3. Disable CarPlay Restrictions. Go to Settings > Screen...