Power Steering Pump Actuator

The power steering pump actuator assembly at the power steering pump discharge fitting contains an Electronic Variable Orifice (EVO) solenoid-operated pintle valve. Fluid leaving the pump passes through an orifice in the actuator tip. When the solenoid is grounded by the EBCM, it moves the pintle into the orifice, reducing power steering fluid flow. As vehicle speed increases, the pintle restricts the orifice proportional to the speed of the vehicle.
Other power steering system components, while specially modified for use with the VES system, are similar to non-VES power steering components.