Circuit/System Description
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The electronic brake control module (EBCM) controls the variable effort steering actuator on the steering gear. At low speeds and parking lot maneuvers the orifice is commanded open increasing fluid flow and reducing the steering effort. At high speeds the office is commanded closed restricting fluid flow increasing steering effort. The EBCM monitors and compares the Commanded and Feedback Current parameters to detect malfunctions in the VES system.