WARNING: This page is about a different car, the 2018 Hyundai Ioniq. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of HYUNDAI MOTOR AMERICA
NOTE:
IBU (Integrated Body control Unit): "BCM" BCM (Body Control Module): "BCM" TPMS (Tire Pressure Monitoring System module): "BCM"