An anti-lock brake system (ABS) differential speed sensor measures the rotational speed of the rear differential's ring gear so that the ABS Computer knows how fast the rear wheels are turning. The ABS differential speed sensor utilizes a stationary electrical sensor that is located in close proximity to the rotating area of the differential's ring gear and this electrical sensor generates an analog signal that corresponds to the actual speed of the ring gear.
The term "ABS Pump" usually describes a combination assembly that consists of an electric brake fluid pump and a solenoid controlled valve body that either releases or builds brake system pressure to the individual wheels, depending on the commands it receives from the ABS computer.
An anti-lock brake system (ABS) wheel speed sensor measures the speed of each wheel. Each wheel usually has one sensor, but some vehicles have one sensor for both rear wheels. The ABS wheel speed sensor utilizes a stationary electrical sensor that is located in close proximity to the rotating area of the wheel or axle; this electrical sensor generates an analog signal that corresponds to the wheel's actual speed.
