ABS Braking-Hold Pressure

Fig 14 - Hold PRESSURE - HYDRAULIC CONTROL:

For explanation purposes we will assume all speed sensors are sending the same wheel speed information, requiring the same modulation at the same rate.

ISOLATION VALVES

Closed, isolating the wheel brakes from the master cylinder primary and secondary fluid supplies. Build and decay valves are closed preventing any fluid from reaching the open isolation valves.

DECAY AND BUILD VALVES

Closed.