Which component of ABS actually generates electric pulses?

The component that generates electric pulses in an Antilock Braking System (ABS) is the exciter. The exciter is responsible for creating a magnetic field that allows the wheel speed sensor to detect the rotational speed of the wheels. As the wheels turn, the sensor receives signals from the exciter and converts this motion into electrical pulses indicating the speed of the wheels.

The wheel speed sensor plays a crucial role in monitoring wheel speed but does not generate the electrical pulses itself; it relies on the exciter for that purpose. The electronic control unit (ECU) is involved in processing the signals from the sensor and making decisions to control the ABS functionality but does not generate the pulses directly. Modulator valves are used to control brake pressure but are not involved in generating electrical pulses either. Therefore, the exciter is the key component that directly produces the electric pulses needed for the accurate operation of the ABS.