METHOD AND DEVICE FOR OPERATING A HYDRAULIC BRAKING SYSTEM, BRAKING SYSTEM AND VEHICLE

A method for operating a hydraulic braking system including a main brake cylinder and at least one brake circuit, which includes at least one hydraulically actuatable wheel brake, an activatable pressure generating unit configured to generate a hydraulic pressure in the brake circuit when a pressure demand occurs, and an activatable auxiliary pressure generating unit configured to alternatively generate the hydraulic pressure in the brake circuit, the auxiliary pressure generating unit being activated upon recognition of a malfunction in the pressure generating unit to generate the hydraulic pressure. The auxiliary pressure generating unit is assigned an activatable control valve in order to interrupt or establish a connection to the main brake cylinder. The braking system is monitored for the occurrence of a brake demand, and that upon detection of a brake demand, the control valve is activated to interrupt the connection to the main brake cylinder.