Hydraulic Control Assembly - Antilock Brakes: Description and Operation

The Brake Pressure Modulator Valve (BPMV) is part of the Electro-Hydraulic Control Unit (EHCU). The BPMV is the hydraulic portion of the EHCU. The EBCM controls the BPMV. The BPMV is split into the following three hydraulic channels:
^ Left front
^ Right front
^ Rear

Each channel has an isolation valve and a dump valve. The front channels share a low pressure accumulator, attenuator, and a pump. The rear channel shares use of the pump, but uses it's own low pressure accumulator and attenuator.