Ihka problem? Ac doesnt engage
 

Hello, I'm struggling with the ac problem on my pre lci e60. My compressor and aux fan does not engage, even when the ac light is on. My aux fan is working properly for cooling the radiator, even with the inpa test of the fan, however, if I connect to ihka module and want to run the aux fan test from there - nothing happens, even with the ac comp test. Error codes of ihka are auxiliary water pump, AUC sensor and heating of windshield spraying nozzles. Freon in ac system has pressure (but dont know the values). Found bad negative cable on the comp so I connected it directly to the ground but still nothing happens and I dont know what else can cause this problem. Is there a possibility of bad comunication of the ihka, or maybe some fault in the module coding, or anything else I can check? Thanks guys 🙏

Need to get the pressures checked you could be low. Also you need to replace the AUC sensor. You may eventually have a bad compressor/clutch check to see if you ca engage it manually. Also ensure your a/c relay is good.

Thanks for reply. Can I read the pressure with inpa?
My compressor does not have the clutch, it spins allways - variable plate compressor, but those pistons are going freely without compresing because its not engaged. The AUC can disable ac compressor? Thought that its only for air quality = inside/outside automatic recirculation