Finally It works !!! I will explain how to:
The tractor is New Holland T7.245 with autocommand with Screen Intelliview iV.
Connect aurduino to Can connector green behind the seat. can-H Pin H, can L pin J
First, configure HH menus Ch1 yes, and Ch2 yes , Ch1 is for CustomSteer ( rotate fast) second for autosteering.
With motor off :
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Press this button 2 seconds ( button for engage autosteer on console)
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Will appear options on small screen in front of steering wheel , select (pressing again auto button) option NAV ( NAU)
3.With nav selected, press again 2 seconds auto button for recording.
Now on intelliview screen will appear option Auto (when you press the console button at the right, to switch off the road mode)
And that’s all!!