DTC B1602-00: CAN Line Error: General Description
WARNING: This page is about a different car, the 2016 Hyundai Genesis and 2015 Hyundai Genesis. However, it is still accessible from the selected car via links, so may be relevant.
I-BOX Module uses B_CAN (Body CAN) for optimizing wires and communicates with other units to receive required data and transmit data to other units.