liudr:
I stand corrected. Here is what I found for one of the vehicles:Nissan chose an electrohydraulic power-steering setup in place of some of its competitors' fully electric systems, a best-of-both-worlds solution that provides the feel of a conventional hydraulic setup with the economy benefits of an electric rack. The decision pays dividends the second you start moving -- the steering communicates with the driver, loads up naturally, and suffers from minimal torque steer.
So yes the power steering is not going to work when power is out. I also suspect there is a program to translate the steering wheel turn into power on the electrohydraulic pump, and yes speed sensitive steering so a problem with that program may translate into spurious maneuvers. I was wrong thinking a motor moves the wheels. A pump does that.
But more fundementally does that means that a failure of the pump in the Nissan would still allow 'armstrong' direct mechanical steering control for the driver?
Lefty