Method for controlling an electronically slip-controllable externally powered brake system, in particular for a motor vehicle, and electronically slip-controllable externally powered brake system, in particular for a motor vehicle

A method for controlling an electronically slip-controllable externally powered brake system for a motor vehicle, the externally powered brake system including an actuating device configured to specify a desired braking;

• a master brake cylinder coupled to the actuating device;
• at least one brake circuit;
• a wheel brake connected to the brake circuit;
• a brake pressure generator actuatable by external force, the brake pressure generator and the master brake cylinder each being contacted, parallel to one another, to the brake circuit;
• a pressure generator control valve configured to control a first pressure medium connection between the brake pressure generator and the brake circuit;
• and a brake circuit control valve configured to control a second pressure medium connection between the brake circuit and the master brake cylinder, the method comprising the following:
• operating the externally powered brake system in an operating state during which the pressure generator control valve assumes an open position without a brake pressure prevailing in the brake circuit and without a buildup of brake pressure being carried out, and in the operating state of the externally powered brake system, the brake circuit control valve is actuated in such a way that the brake control valve assumes an open position.