12-volt electrical power. The brake actuator has an electric pump that provides the hydraulic pressure for the system, and valves to pressurize each wheel caliper to apply the friction brake when required by the system. The system includes all of the complexity of a vehicle stability control system (VSC), antilock brake system (ABS), and the requirement to use the Regeneration Braking as the primary mode of slowing the vehicle unless the Traction Battery (high-voltage battery) state of charge is too high to accept the additional energy or a panic stop or ABS situation is detected by the system. The sensors monitored as inputs for the brake system include the wheel speed sensors, traction battery state of charge, yaw sensor, brake pedal, stroke sensor, steering wheel angle, hydraulic actuator pressure, hydraulic pressures of each wheel caliper circuit, and accelerator position. Other information and inputs are also monitored. The standard or typical operation is as follows: The vehicle operator presses the brake pedal The master cylinder converts the brake pedal movement to hydraulic pressure the stroke sensor measures the pedal movement to identify a "panic stop" condition The pressure transducer provides the brake force desired. The Brake Control Unit (computer) detects the inputs, and then checks the wheel speed sensors to determine vehicle speed, and to determine if a wheel lockup requires the ABS algorithm. The Brake Control System then checks the yaw sensor, steering wheel angle, and state of charge of the traction battery. If the speed of the vehicle is above about 7 MPH, the vehicle traction motor generator is used as a generator to convert the kinetic energy to electric power, and stores the energy in the battery. This slows the vehicle. If the operator (driver) presses the brake pedal harder, the system will apply hydraulic friction brakes to increase brake force. Once the vehicle speed drops below about 7 MPH, the hydraulic brake system will completely take over, as regenerative Braking does not work effectively. If the yaw sensor detects vehicle yaw, the system will initiate vehicle stability algorithms and processes (VSC). If the wheel speed sensors detect wheel lock-up, the system will initiate anti-lock algorithm (ABS). EBS Brake-by-wire exists on heavy duty commercial vehicles under the name Electronic Braking System (EBS). This system provides electronic activation of all braking system components including retarder and engine brake. EBS also supports trailers and communicates between the towing vehicle and