Antilock Brake System

ANTILOCK BRAKE SYSTEM

The purpose of the antilock brake system is to prevent wheel lockup under braking conditions on virtually any type of road surface. Antilock braking is desirable because a vehicle that is stopped without locking the wheels retains directional stability and some steering capability. This allows the driver to retain greater control of the vehicle during braking.


Left-Hand-Drive (LHD) vehicles use an Antilock Brake System (ABS) designated MK25e. Right-Hand-Drive (RHD) vehicles feature an ABS designated MK20e. Both antilock brake systems are available with or without traction control. The differences are mainly found in the Integrated control Unit (ICU).


Traction control reduces wheel slip and maintains traction at driving speeds below 64 km/h (40 mph) when road conditions call for traction assistance.


The ABS shares most base brake hardware used on vehicles without ABS. Included in the ABS system is an integrated control unit (ICU) and four wheel speed sensors.


All vehicles equipped with ABS use electronic variable brake proportioning (EVBP) to balance front-to-rear braking when the brakes are applied in the partial braking range.