I have the same scanner. It will read modules, not sure if it will read all. It depends on which ones are supported for that vehicle. It scans and shows a fault similar to the above and then you can press enter on the fault and it will show the code and then display what it means. Very intuitive.

OK so this is where I am at so far. I bought a set of the AC manifold from Harbor freight for $65 and checked the low and high side pressure and they were in spec. I disconnected the little pressure switch next to the compressor and the fan did NOT turn on. I watched high pressure side spike well past 200 and the lines were getting hot, why because the fan didn't turn on. UGh

So anyway I shut everything down and then confirmed with a volt meter that I had 12volts at the connector for the fan.

How do I know that it's not the fan but the little pressure switch that is bad?

If the fan is bad instead of replacing it would it be easier if I replaced the clutch fan with an electric fan out of a manual X5? Wouldn't that just solve all the problems?

I just want to make sure I don't buy a new fan and not need one or buy the wrong part entirely.

Haven't seen where you have identified year and model you have. Should add it to your signature as different years or engines may not be the same.

On a 2002 When the engine is running with the AC on the aux fan will run within a minute or so. If it doesn't the fan still may be fine. The following may help- https://www.youtube.com/watch?v=ULwE_u9XijY

O sorry 2001 x5 3.0i

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So everything is pointing to the aux fan, anyone know a good place to buy one?

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With INPA you can manually turn the aux. fan on to test it. Can your Schwaben scanner do this too?

No it can't I can get to the AC module and can activate the compressor, vent flaps and blower motor but not the aux fan. Maybe its in a different module but I didn't see it when I looked

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Fan faults are located in the DME module. The DME sends a signal to spin the fan and once the fan is up to a certain speed, the DME stop the signal. When a DC motor free wheel it is generating electricity. The DME looks at the electricity voltage being generated by the aux fan. No electrical voltage to the DME will indicate that the fan is not working.

Look under DME menu - not the AC module (IHKA). As UAN said, the DME drives the aux. fan, not the AC system. ;)

So looking through the DME section of menus I came across this.
I also found the function to activate the fan to test and it did NOT turn on so now I'm pretty sure it's the fan that's dead. Now to find the part