Anti-Lock Brake System: Operation

An ABS indicator light, located in the instrument cluster, 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 time vehicle speed exceeds 4 MPH. An actuator noise will be heard as vehicle speed exceeds 4 MPH. If brake pedal is depressed before vehicle speed exceeds 4 MPH, primary check will not occur until brake pedal is released.

Under normal driving conditions, ABS functions like a standard brake system. Upon detection of wheel lock-up, short pedal pulsations, occurring in rapid succession, will be felt in brake pedal. Pedal pulsations will continue until there is no longer a need for ABS function or until vehicle is stopped. Applying constant force on pedal results in shortest stopping distance.