The reason "Tiny Cooling Fan" fault lies in temperature sensor plug. Because temperature sensor plug is damaged, it is always a car with a computer can not make a wrong signal cryogenic cooling fan operation. "Tiny Cooling Fan" naturally can not operate normally. Finally, after the temperature sensor plug replacement, the car returned to normal. Visible, the car temperature sensor plug computer receives an input signal, when the water temperature reaches a predetermined value, the computer will control the ground Ground fan relay, so that "Tiny Cooling Fan" operation. These are two very different control methods, but as long as we figure out how they work, the fault of careful examination and analysis, the same can quickly solve this problem.