The electronic fan of the diesel version of the Grand Cherokee engine will only rotate when the water temperature is 103.

Does the subject want to ask "why does the electronic fan of the diesel version of the Grand Cherokee engine rotate when the water temperature is 103"? You're in high gear. The diesel version of the Grand Cherokee engine refers to a 3.0T turbocharged diesel engine. According to the introduction of this engine, it is known that the engine always has two gears, one is the low gear and the other is the high gear. Generally, the high gear only works when the air conditioning pressure is too high and the engine water temperature reaches 103 degrees Celsius, so it only works when the fan water temperature is 103, because the high gear is used.