When it comes to driving a compact SUV, there are some things that drivers demand. I suddenly started to get a warning message saying Travel Assist is currently unavailable. Problem is, I cannot locate the Coolant Temperature Sensor! I have spent about 2 hours searching the internet and there does not seem to be any definitive answer as to it's location. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). If you don't see anything melted, turn the a/c on and then wiggle the big green fuse on the left. Went on Ebay and ordered a used sensor with the same part number. There is a speed sensor on each wheel, the are mainly used by the ABS system.