Anti-Lock Brake System: Description

The Anti-Lock Brake System (ABS) consists of an actuator, hydraulic unit, 4 actuator solenoids, pump motor, ABS Electronic Control Unit (ECU), and 4 speed sensors. 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 4 MPH. If brake pedal is pressed before vehicle speed exceeds 4 MPH, the primary check will not occur until brake pedal is released.