ABS is intended to prevent all the wheels from blocking in the case of emergency braking or the braking icy road.
ABS consists of a main block, located mostly under the hood of the cars. The metal pipes connected the block with the brake cylinder and braking system. There are also speed sensors of every wheel and a computer, processing the information from the sensors and sending signals to the main block.
The driver will be warned about the response of ABS system with the lighting sign on the dashboard and the pushes in the brake pedal. If the sign on the dashboard burns constantly, this shows that the system is out of order because of brake or, as it often happens in the cars, one or more wheel speed sensors (removed during the replacement of pillars) are absent. If ABS system is broken, the braking system works as usual.