Circuit/System Description
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
The valve relay is located within the electronic brake control module and supplies battery voltage to all of the solenoid valves when commanded On. The solenoid valves are integral parts of the brake pressure modulator. The brake pressure modulator contains an isolation solenoid valve and a dump solenoid valve for each wheel. It also contains a traction/stability control prime solenoid valve and isolation solenoid valve for each brake circuit. The solenoid valves are not engaged during normal system operation. When the ABS, the traction/stability operation is required the electronic brake control module turns the required solenoid valves ON or OFF.