Pacifica V6-38L VIN L (2005) Hydraulic Control Unit (HCU)
Hydraulic Control Assembly - Antilock Brakes: Description and Operation
Hydraulic Control Unit (HCU)
HYDRAULIC CONTROL UNIT
DESCRIPTION - MK25
The hydraulic control unit (HCU) is mounted to the CAB as part of the ICU (Fig. 10). 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.
DESCRIPTION - MK25E
The Hydraulic Control Unit (HCU) is mounted to the Antilock Brake Module (ABM) as part of the Integrated Control Unit (ICU) (Fig. 18). 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.
OPERATION HYDRAULIC CIRCUITS AND
VALVES
NOTE: The following applies for both MK25 and MK25e ABS.