Anti-Lock Brake System - BOSCH: Description

NOTE: Bosch ABS is used on Camrys built in the United States by Toyota Motor Mfg. U.S.A.

Anti-Lock Brake System (ABS) consists of an actuator, control relay (solenoid relay and motor relay), ABS Electronic Control Unit (ECU), and 4 wheel speed sensors. ABS brake system is Bosch design. ABS ECU and relay are part of actuator assembly. See Figure.

An ABS indicator light is located on the instrument cluster. Indicator light comes on for 3 seconds as a bulb test when ignition is turned on. A primary check is performed after each engine start, and initial vehicle speed exceeds 6 MPH. If brake pedal is pressed before vehicle speed exceeds 6 MPH, primary check will not occur until brake pedal is released.

NOTE: For more information on brake system, see BRAKE SYSTEM - FWD article.