Hydraulic Control Unit (HCU)
WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The HCU contains the solenoid valves, the hydraulic pump motor and the pressure sensor used by the ABS for the various vehicle dynamic systems. The ABS module and the HCU are attached directly together. On vehicles equipped with adaptive cruise control, the ABS module and HCU are serviced as an assembly.