Quote:
Originally Posted by StephenVA
bcredliner
Can you post the steps to test the aux fan using the IMPA or other software, so the OP can get the right procedures? A few screen shots will help here also.
I do not think some of our newer readers understand that the on-board computer has built tests that will fire up devices, switches, sensors, relays, etc. All of which need a computer to send the signal not a $50 OBDII generic code puller.
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I don't use the BMW INPA-DIS software unless I have no other option. I use it so seldom I have to start the learning curve all over again and that is not fun for me.
I would start with the easy stuff. I would make sure all associated fuses are good. Then I would start the vehicle and see if the fan goes through the test, starting up, turning slowly and then shutting off. If it doesn't I would ask someone how to use the software just as you have or go to the forum dedicated to using the software package.
More likely, I would pull the bumper and remove the fan as the most probable cause and bench test it to make sure it was the fan rather than a problem upstream.