Hello there,
I am trying to identify the component in red circle. It is marked something like "8HF 6H2NR" or "BHF 6H2NR". For sure is shorting +24V power line to ground, doesn't have cathode mark (other similar components from the board have), maybe is part of powering CAN driver (TJA1050). Right of this component is p-channel mosfet. Unfortunately the board is more than 2 layers and the traces are not traceable. It is possible to be protection electronic (possible to short +24VDC with 230VAC via breaking the power supply cable).
Thanks in advance!