Antilock Brakes / Traction Control Systems: Description and Operation

The anti-lock brake system adjusts the brake pressure whenever a wheel is about to lock up, allowing the driver to maintain greater control of the vehicle under heavy braking conditions. Under normal driving conditions, the anti-lock brake system functions the same as a standard power assisted brake system.

The electronic brake control module (EBCM) receives inputs from individual wheel speed sensors and the G-sensor. The electronic brake control module (EBCM) uses the inputs to control the ABS hydraulic unit, which adjusts the hydraulic pressure applied to each caliper on the basis of the signals received from the electronic brake control module (EBCM).

The electronic brake control module (EBCM) has a self-diagnosis function which monitors the system's function. When a malfunction is detected, the "antilock" indicator light is turned on and the anti-lock braking function is disabled; but the standard power assisted brake system continues to operate normally.