Anti-Lock Brake System: Operation

Each wheel sensor sends an AC electrical signal to the CAB. The CAB translates this information as wheel speed. When any decelerating wheel speed rate is determined to be excessive in comparison to other wheels, the CAB cycles hydraulic brake pressure to each wheel to equalize speed of all wheels. ABS turns itself off at 3-5 MPH. Minor lock-up may occur at this point.

Red  BRAKE warning light will come on when ignition switch is in START position. Light should go off when ignition is released. If light does not go off, the following problems are possible: parking brake not fully released, low brake fluid, low accumulator pressure or low hydraulic pressure.

MD14Amber ANTI-LOCK warning light will come on for 1-30 seconds after ignition is turned on. This indicates system is performing a self-diagnostic test. If light does not go off after indicated time, system has found a fault. ABS is deactivated during this period. Normal braking is unaffected. Testing should be done to find and correct fault.