I've been led to believe this is the sensor that controls the fan, it's an OBD0 B18A, which doesn't have a knock sensor. My fan doesn't switch on, and i can't see a plug that would have connected here, can anyone quickly describe to me what route that plug would normally take back to the fuse box, so i can crawl under my car and look to figure out where the wires were routed? There is a switch in my dash, but it doesn't control the fan, and i can't find where the wires pop out into the bay.