Alright, so I'm swapping a vq35de into another vehicle and in the interest not adding other random sensors and switches to the engine I figured I could trigger the fans with the stock system. However, it looks like the ECU sends a CANbus signal to the IPDM and that triggers the 3 relays. Does anyone know what that signal is? Even the pid and I might be able to narrow down the specific signal? It would be really simple to have an arduino on the canbus trigger the relays instead of trying to wire in an IPDM or have another coolant switch in the system to trigger them.