Grand Caravan V6-3.3L VIN R (2005)
On Later Launch production vehicles (which are equipped with the MK25e ABS), the hydraulic control unit (HCU) is mounted to the ABM as part of
the ICU (Fig. 7). 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 - MK25e
NOTE: The following applies for MK25e ABS only.
The hydraulic fluid control valves within the HCU control the flow of pressurized brake fluid to the wheel brakes during the different modes of ABS
braking and traction control. The following paragraphs explain how this works. For purposes of explanation only, the following diagrams show only
one hydraulic circuit, the Right Front wheel braking circuit.
NORMAL BRAKING HYDRAULIC CIRCUIT AND SOLENOID VALVE FUNCTION (ABS WITHOUT TRACTION CONTROL)
