Anti-Lock Brake System: Description
The Anti-Lock Brake System (ABS) consists of an ABS Electronic Control Unit (ECU), control relay, actuator, 4 speed sensors, deceleration sensor and stoplight switch. See Fig 1.
An ABS indicator light is located on the instrument panel. This light comes on for 3 seconds as a bulb test when ignition is first 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 exceeds 4 MPH, primary check will not occur until brake pedal is released.
NOTE:
For more information on brake system, see appropriate BRAKE SYSTEM
article.