DTC B1609-00: CAN Time-out SJB, FSJB: General Description
WARNING: This page is about a different car, the 2017 Kia Optima. However, it is still accessible from the selected car via links, so may be relevant.
The BCM is responsible for monitoring and controlling body electrical systems. The BCM uses B_CAN (Body CAN) to communicate with other modules to receive required data and transmit needed data.