I forget to mention one thing, after you read all data off the old one, when you connect to the new one , you will be programing to the car you first need to do a ECU erasure reset that will be located on the same part of the screen and then after you do that that's when you can write what you had take off the old one to the new one, I have never tried to write it without clearing it so I would recommend to Clair it first and then read it after you program it to make shore that it was write to the computer. Before you install it back in the car.
I forget to mention one thing, after you read all data off the old one, when you connect to the new one , you will be programing to the car you first need to do a ECU erasure reset that will be located on the same part of the screen and then after you do that that's when you can write what you had take off the old one to the new one, I have never tried to write it without clearing it so I would recommend to Clair it first and then read it after you program it to make shore that it was write to the computer. Before you install it back in the car.