The Engine Coolant Temperature Sensor sends its data to the PCM. There is no other sensor in the loop other than an input from the A/C (when engaged) and that will turn on and off the fan as well.
Now the E-fan is geared to come on at 217 degree's F and turn off at 208 degree's. So the coolant needs to drop that 9 degrees F to turn off the fan. With you telling us that it kicks on and off THAT quick with only a touch of the throttle (to me) means that the sensor is starting to fail. You usually would notice this fluctuation but at only 9 degree's you might not be.
For like only $10 bucks, just replace it.....IMHO
yup i agreee
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