HCU (Hydraulic Control Unit): Description
WARNING: This page is about a different car, the 2004 Dodge Dakota and 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
The hydraulic control unit (HCU) consists of a valve body, pump, two accumulators and a motor (Figure ). The assembly is mounted on the driverside inner fender under the hood.