Brake Disc Temperature
WARNING: This page is about a different car, the 2021 Hyundai Kona. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of HYUNDAI MOTOR AMERICA
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The ESP calculates the DISC temperature with the Wheel speed, vehicle speed change, control mode and BLS (Brake Lamp Signal) signal.
The calculated DISC Temperature is used to protect DISC from overheating caused by overuse which may cause a decrease in brake efficiency.