This is a purely electrical issue. I've never seen this one in particular but it boils down to one of three things.
- The resolver,
- The control unit,
- Or one of the four wires between them.
Ok, that's six things but you get what I mean. Gun to my head, I'd start with the resolver. Moving parts, brushes, slip rings... but if that was the case, I feel like we should've heard about this before now, and more often.
POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: C1528; Motor Rotation Angle Sensor Malfunction; 2013 MY FR-S [03/2012 - ]