Actually, Mojave, I'm assuming I can send a CAN signal to an arduino via the VCU, and just have the arduino interpret the CAN message into a PWM signal that drives the A/C compressor... I already have the PWM signal setup to output correctly from an arduino to drive the compressor. I'd just be changing my code logic on the arduino to interpret a CAN message instead of a temperature value from an external sensor. That would in theory let me retain climate control via the vcu, correct? I'm assuming that all interfaces and supports programmable behavior via the carbon display?