A brake system for selectively actuating at least one of a pair of front wheel brakes and a pair of rear wheel brakes includes a reservoir and a master cylinder. A power transmission unit is configured for selectively providing pressurized hydraulic fluid. A pair of rear brake motors selectively electrically actuate rear parking brakes. An electronic control unit controls at least one of the power transmission unit and the pair of rear brake motors. A normally-closed DAP valve is located hydraulically between the power transmission unit and at least one of a two-position three-way valve and at least the selected one of the pairs of wheel brakes. An isolation valve and a dump valve are associated with each wheel brake.