First check is to see if the Power Steering is functioning or not!
Put key in ignition, and undo steering lock, but do not turn ignition on.
Feel how heavy the steering is.
Now turn ignition on and start the engine (remain stationary)
How does the steering feel now?
If it is the same, then power steering is not working so all the above checks are valid (note nothing to do with speed sensor as car is not moving!) or PAS system is faulty.
if there is a noticeable difference, then it is either normal (just heavier than you expect), or the PAS system is faulty.
I have two TF's, and the power steering feels different between them, but neither are "heavy" when stationary.
peter