| Description and Operation The Anti-Lock control system consists of: Hydraulic Control Unit (HCU) The HCU is an integrated unit and consists of: - hydraulic control unit (HCU) consisting of an aluminum block containing solenoid valves and a pump motor.
- electronic control unit (ECU) consisting of a printed circuit board with microprocessors, integrated software and the magnetic coils for driving the solenoid valves in the HCU.
Wheel Speed Sensors Active wheel speed senors consists of: - a wheel speed sensor located at each wheel, containing a small processor for sending a digital signal to the ECU.
- an encoder ring.
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