climate control , a/c

[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.

[StephenVA]

Guys

The 12V jump to the compressor is just that, a quick test to confirm operation of the clutch and that the compressor will spin, regardless of line pressure and system functionality. NEVER run a car more than a few mins. As was mentioned above, this test bypasses everything to prevent damage to the system. Ice forming, over pressure, over heating, compressor damage, etc.

[bcredliner]

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.

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.