iphone 15 Pro Max to Car Play using cable
Once you have set up your iPhone 15 Pro Max to your vehicle, go to settings on your vehicle’s screen. Select Smartphone, select Apple CarPlay, select your new iPhone 15 Pro Max and enable it. This should work with any USB A to USB C connection.
I too was having issues and thought the cable I bought wasn’t compatible but after playing around with the settings on my 2018 Honda CRV screen it worked. Now I can un-return my product. Hope this all works for you.