Antilock Brakes / Traction Control Systems: Description and Operation

This model is equipped with an antilock brake system. Under unstable braking conditions the ABS control unit senses the drop in speed and modulates hydraulic pressure to the brakes, preventing lockup of the wheels.
The wheel ABS is composed of electrical and mechanical components (hydraulic unit), and components of the standard brake system.
The system uses 3-sensors and 3-channels which control front wheels each independently and rear wheels by type of select low. When the system detects a slip in one of the wheels, hydraulic pressure is applied to the brakes on the side where the slip is first detected.
Any malfunction of the ABS electrical or mechanical components is judged by the self-diagnosis function in the ABS control unit. All malfunctions are indicated by the warning lamp in the instrument panel. In normal condition, the ABS warning lamp is on for 2 - 3 seconds after engine starts and goes out. If it stays on continuously, you may have malfunction with ABS system. The location of a malfunction is indicated to the technician by a flashing pattern of the ABS warning lamp (or a diagnosis scan tool (Kia power scan)). The self-diagnosis and indication functions must be used when diagnosing malfunctions of the ABS.