Checking Airbox Temp Sensor??

I don't know that, but if you have a good dealer he could hook it up to Digital Wrench and verify that the temp is the same as out side air temp with it not running...that is probably the best check....seems like resistance on any brands 5v sensors is inaccurate...

mrclueless said:

I am trying to figure out if the the airbox sensor in my 08 Dragon 700 is working ok. The pin 1 to2 resistance is supposed to be about 3000 ohms at 59 deg F, mine checks in at 3400 ohms at this temperature. The other pin resistances are within range.

Anyone know if this resistance is acceptable??

Click to expand...

Yes.

Considering that the given spec for 68 degrees is 2500 ohms, one could conclude that for every 500 ohms, there is a change of 9 degrees F that is reported to the ECM.

So to find a ration of ohm/ degree, 500 ohms/9 degrees =55.55 ohms per 1 degree

At 3,400 ohms, leaves a difference of 400 ohms divided by the 55.55 would equal 7.2 degrees. (400ohms/55.55ohms per degree=7.2 degrees)

Subtract the 7.2 degrees from the 59 gerees would equal 51.8 degrees at 3,400 ohms. Most intake air temp sensors that I've tested have always had a plus/minus of 5 minus degrees.

So yes, you sensor would definately be okay. Try putting it in the fridge and then freezer and take ohm readings as fast as possible to verify that it is actually working in diffeent temps.

Sorry...couldn't sleep.