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ANTILOCK BRAKE SYSTEM DEFINITIONS In this section of the manual several abbreviations are used for the components that are in the Bendix An- • ABS—Antilock Brake System • PSI—Pounds per Square Inch (pressure) • WSS—Wheel Speed Sensor • AC—Alternating Current NORMAL BRAKE SYSTEM FUNCTION Under normal braking conditions, the Bendix An- tilock 4 Brake System functions the same as a stan- When a wheel locking tendency is detected during a brake application, the vehicle brake system will enter MAJOR COMPONENTS The following is a list of major system components. Details of all components can be found later in this MASTER CYLINDER AND VACUUM BOOSTER The Bendix Antilock 4 Brake System uses a vehi- cles standard Master Cylinder/Reservoir and Vacuum MODULATOR AND PUMP MOTOR/ASSEMBLY The Modulator Assembly (Fig. 3) contains the elec- tronic valves used for brake pressure modulation, The Pump/Motor function, as part of the modulator assembly, is to pump low pressure brake fluid from the WHEEL SPEED SENSORS A Wheel Speed Sensor (Fig. 4) is located at each wheel to transmit wheel speed information to the CAB. CONTROLLER ANTILOCK BRAKE CAB The CAB (Fig. 5) is a small computer which re- ceives wheel speed information, controls Antilock op- Fig. 2 Master Cylinder And Brake Booster Assembly Fig. 3 Modulator And Pump/Motor Assembly Fig. 4 Wheel Speed Sensor 5 - 14 ANTILOCK 4 BRAKE SYSTEM Ä |