Traction control serves as an ancillary function of the anti-lock braking system that helps reduce tire slip while accelerating over slippery surfaces. Modern vehicles utilize electronic controls within the traction-control system to reduce power to the wheels and eliminate tire slip. This feature helps drivers accelerate under varying conditions.
Traction control uses the same speed sensors as the anti-lock braking system. The sensors are capable of measuring differences in the rotation of the wheels to identify wheels that have lost traction. After the traction control system identifies a wheel that is rotating faster than the others, the system automatically activates the brakes to reduce speed and limit slip. On some vehicles, the traction control system reduces engine power to wheels that have lost traction.