Apassive sensor creates an AC signal that changes frequency as the wheel changes speed. The ABS control module converts this AC signal to a digital signal for interpretation. It monitors all-wheel speed inputs. Thewheel speed sensor is responsible for relaying the wheel speed to the ECU so that it can tell the ABS system how much pressure to safely apply. When the wheel speed sensor is broken or not working as it should, one of the first things that are affected is the ABS system. Thevehicle speed sensor, also known as a transmission speed sensor or output shaft speed sensor, plays an active role in your car's transmission and cruise control systems. There are also ABS wheel speed sensors (WSS) on a vehicle's wheel hubs (both on the front axle and rear axle). Likeany other speed sensor, a speed sensor can be an inductive sensor (magnet with a wire coil surrounding it) that produces an AC analog wave, or it can be digital, which produces a square wave. Some wheel speed sensors are designed to detect whether the vehicle is moving forward or backward. .

what type of sensor is a wheel speed sensor