HCU (Hydraulic Control Unit): Description
WARNING: This page is about a different car, the 2004 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.
The hydraulic control unit (HCU) is mounted to the CAB as part of the ICU (Figure ). The HCU controls the flow of brake fluid to the brakes using a series of valves and accumulators. A pump/motor is mounted on the HCU to supply build pressure to the brakes during an ABS stop.
For more information, (Refer to DESCRIPTION ).