Impossible Change CO
 

Hi, I recently purchased a Yamaha FI diagnostic tool, it is not the black device, this is silver colored with the same buttons, up, down and mode. The problem is that it does not let me modify the CO of my Yamaha Tener� model 2013. When entering the menu of the cylinder one appears CX and does not let change the value that comes predefined in O. I have tried to connect it of multiple forms, but it is impossible . I hope your help and I apologize for my horrible English.