When Your CAN Bus Isn’t Talking: A Field Guide to Splitting Ferrites, Common-Mode Chokes, and Shielded Cables
I spent last Tuesday morning staring at an oscilloscope in a customer’s lab, watching a J1939 backbone that looked more like a heartbeat monitor than a clean digital signal. The glitches were random, the error frames were intermittent, and the engineering manager was ready to swap every node on the network. When you are deep in the weeds of diagnosing intermittent CAN […]