• The first connection may take longer. 
• Only iPhone supports CarPlay™. 
• Ensure Wi-Fi and Bluetooth functions on the phone are working. 
• In iPhone Settings, go to General > CarPlay™, delete all records, and reconnect. 
• Restart the iPhone and try reconnecting. 
• Restore screen's Factory Settings by going to home screen: Setting>Basic Setup> Restore Factory Setting.

Reset the unit to factory mode and try again. 

Please note that resetting your device to factory settings removes all current data.