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Home >> Pontiac >> 2004 >> Aztek Base, FWD >> Repair and Diagnosis >> Brakes >> Antilock Brake System And Traction Control System >> Description and Operation >> ABS Description and Operation >> Pressure Hold

Pressure Hold

The EBCM closes the inlet valve and keeps the outlet valve closed in order to isolate the system when wheel slip occurs. This holds the pressure steady on the brake so that the hydraulic pressure does not increase or decrease.