Hydraulic Control Assembly - Antilock Brakes: Description and Operation

Anti Lock Pressure Valve And Module Assembly:

The Anti Lock Pressure Valve (APV) mounts to the combination valve under the master cylinder. The APV has an isolation valve to maintain or increase hydraulic pressure, a dump valve to reduce hydraulic pressure, and an accumulator to store brake fluid during the dump cycle. The Electronic Brake Control Module (EBCM) uses the APV to control hydraulic pressure in the rear brake pipes.