Technician A says when a vehicle with an electronic variable orifice (EVO) steering system is operating below 10 mph and the steering wheel rotation is above 15 rpm, power steering assist is increased. Technician B says on this vehicle, power steering assist is decreased when the vehicle speed is above 25 mph. Who is correct?

Question

Quizplus · Accepted Answer

Electronic Variable Orifice (EVO) steering systems adjust the level of power steering assist based on vehicle speed and steering wheel rotation speed. At lower speeds and higher steering wheel rotation speeds, power steering assist is increased to make steering easier during maneuvers such as parking. At higher vehicle speeds, power steering assist is decreased to provide better road feel and stability. Therefore, both Technician A and Technician B are correct.

Technician a Says When a Vehicle with an Electronic Variable