J1939 Termination Resistor Drift in Extreme Temperatures: Measurement Protocol for Forestry Applications

A few years ago, I spent a week at a logging operation in northern British Columbia. The mornings were around -38°C, and every day the same harvester would throw CAN bus errors until the cab warmed up. After three days of swapping ECUs, checking wiring harnesses, and reloading software, we finally measured the terminating resistor with the connector cold-soaked. […]