The paper presents the results of simulation and research of antilock braking systems (ABS) carried out on the fast rotating drum stand with flywheels. The model of the vehicle-drum stand system was presented. The influence of car suspension and tyre parameters during braking with ABS on vehicle vibrations was analysed. Theoretical analyses of the simulations were verified during car tests on a prototype drum stand. The results of braking tests for passenger car on the homogeneous surface and on the surface with changed adhesion coefficient were presented. Qualitative criteria for diagnostic evaluation of ABS operation were proposed.