Ok if read button went grey, it read your stock ecu ok.
The read is grey as oft doesnt have your ecu calid in its onboard database.
Go to ecu info under tuning, find you ecu calid be somethung like ZA1JN10C
Then go to the openflash support site and downliad tune files for your cakud then upliad to rablet anf flash
https://support.openflashtablet.com/support/home
Your specific issue
https://support.openflashtablet.com/...talling-my-oft