The GS-911 has a 'routine' that parks them then when you're done it re-engages the steppers to function properly again.
I would assume the BMW factory diagnostic computer does the same. I'm not familiar with any other systems but would assume they function in a similar fashion as well.
So no the EFI computer doesn't automatically re-engage the steppers all on its own, at least during these diagnostic functions.
• The hidden harmony is found with joy, while the obvious brings indifference.
• The farther you enter into the Truth the deeper your conviction for truth must be.
• There is understanding of the world precisely to the degree that there is understanding of the Self.
Collected Works of the WingMakers Volume 1 pg. 590