A system and method for secure and restricted transitions between steering
control modes for a vehicle with active front steering is disclosed.
Possible operating control modes include precision, electric phase
locking, and proportional integral derivative (PID) modes. Each operating
control mode is monitored and the operational status of the modes are
checked before transitioning. For security, the system can prevent
transitions from PID to precision control mode and restrict electric
phase locking mode to transition only to a mechanical locking mode.