Power Steering Fluid Flow Actuator

The power steering fluid flow actuator, mounted on the power steering pump, contains a solenoid operated valve. Discharged fluid passes through an orifice in the actuator. As the vehicle speed increases, the power steering control module increases electrical current to the fluid flow actuator. Higher cur-rent gradually moves the valve further and further into the orifice. This action restricts the passage of fluid flow through the orifice, reducing power assist in the steering gear.

Because the Power Steering Control Module sends a variable signal, the power steering Fluid Flow Actuator provides variable levels of power assist. The Electronic Variable Orifice (EVO) system therefore consistently adjusts power steering assist for changing vehicle speeds and driving conditions. For repair procedures.