DTC C1616-08: C-CAN Bus OFF: General Description
WARNING: This page is about a different car, the 2016 Hyundai Sonata and 2015 Hyundai Sonata. However, it is still accessible from the selected car via links, so may be relevant.
The CAN communication lines have both low and high line. There are also two resister, one in the Cluster and one in the Engine ECM. The CAN system allows communication between control module. (EPB Module, Gateway (CGW) and each Module)