pistons and will flow unrestricted through the inlet ports, between the chambers and the reservoir.
Pressurized fluid enters the HCU that is mounted on the front of the ABS module. The HCU then modulates the supply of pressurized fluid to the brakes under control of the ABS module. For additional information, refer to: Anti-Lock Control - Stability Assist (206-09 Anti-Lock Control - Stability Assist, Description and Operation).