Why carplay can not upgrade successfully？

First let me briefly show how to updrade carplay by OBD.
Total 7 steps:
1 Turn on the car first
2 plug the OBD
3 wait DIAG come out
4 car will automatic restart
5 lock the car 2 minutes
6 restart the engine
7 if still not see the Carplay menu, connect the phone with USB then check it again 

 here is VIDEO :Carplay upgrade video

Now come to the point Some friend feedback that after upgrade,the screen keep all the time BLACK. picture shows as below :

For this problem , actually you just need to do 

1 lock the car 2 minutes
2 restart the engine
3 connect the phone with USB then check it again

Hope this can be helpful for you . more things let's share by
skype:chalin.abc
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