SJB (Smart Junction Block)
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.
The SJB (Smart Junction Box) sends out switch signals to a variety of components in a form of CAN data and receives control signals from the BCM. Once signals are received, the SJB will operation the system by controlling the IPS. The SJB also controls the PWM constant voltage (lamp control/lamp damage prevention) while being equipped with an auto-cut relay that shuts off black current and a mode switch that cuts permanent power supplied during the long-term parking. To optimize the wiring, the SJB is linked to each module through CAN communication lines, exchanging data with it.