Electronic Brake Control Module: Description and Operation

The Anti-Lock Brake System (ABS) control module is a self-testing, non-repairable unit consisting of two micro-processors which are programmed identically. The ABS control module monitors system operation during normal driving as well as during anti-lock braking. Under normal driving conditions, the micro-processors transmit short test pulses to the solenoid valves to check the electrical system. Under wheel lock conditions, the module produces signals to open and close the appropriate solenoid valves. This results in moderate pulsations in brake pedal.

During anti-lock braking, moderate pulsation in the brake pedal is accompanied by a change in pedal height. This rise in pedal height will continue until the pedal travel switch closes and the pump shuts off. During normal braking, the brake pedal feel will be identical to a standard brake system.