The Variable Effort Steering (VES) system varies the driver effort required to steer the vehicle at different speeds. At low speeds the system provides maximum power assist for ease of turning and for parking maneuvers. At higher speeds increased steering effort will provide the driver with firmer steering (road feel) and directional stability.

The VES system reduces the power steering fluid flow from the pump as the vehicle speed increases. The system provides maximum fluid flow when the vehicle is stationary. The fluid flow decreases as the vehicle speed increases.

The power steering control module uses the vehicle speed input from the Electronic Brake Traction Control Module/Brake Pressure Modulator Valve (EBTCM/BPMV).

Input from the EBTCM/BPMV to the power steering control module causes an appropriate change in the power steering fluid flow control valve actuator.

The power steering fluid flow control valve actuator is mounted on the steering gear. The power steering fluid flow control valve actuator utilizes a pintle valve to control the fluid flow.

The system defaults to a full restriction in the event of a failure. A full restriction results in stiffer than normal steering at lower speeds.