Bmw f30 problem with a/c compressor engage

Ambient temp is ok display about 20 degrees

Hello i have a problem with bmw f30 with a/c. Everything its ok temp. Outside temp. Inside refrigerant pressure 5bar compressor run-out protektion in ista set to 0 adding refrigerant (before less 200g)but no clutch on in compressor still off. I try test compressor in istad and everything work fine (2 minute test a/c) refrigerant grow up to 8 bar fan working and temp inside low but when i stop test a/c not working. I try test in fem clutch compressor and ok. Check FA in esysy and its original. I code full module with ori FA and the same problem. Change ihka module on air  distributor, coding and the same problem. Please help me because i dont know what is wrong. Check coding in ihka and fem and "magnet coupling" set to on. Thanks for help.

Did you tried to update the car to latest ilevel ?

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did you solve this problem??



I have F20 with same problem,tested compresor,new presure sensor, tryed other ihka module, butons module,all temperatures are ok and pressure in cooling system, updated whole car to newest I-level,and still copresonr not working,but when i try output test from FEM i can activate compressor.

did you solve this problem??



I have F20 with same problem,tested compresor,new presure sensor, tryed other ihka module, butons module,all temperatures are ok and pressure in cooling system, updated whole car to newest I-level,and still copresonr not working,but when i try output test from FEM i can activate compressor.

hello

did u have solution.



i have same problem with 2013 f30.


tnx

I also exchanged fem, ecu, ihka, ike, rem, radio, replaced presure sensor, all interior temp sensors, outside temp sensor from another working car and still no dtc, all working except aircon compressor, if i force it with 12v on compresor starts cooling but outside fan not starts, but when go on output triger fan works, i also changed another fan and all same

I also exchanged fem, ecu, ihka, ike, rem, radio, replaced presure sensor, all interior temp sensors, outside temp sensor from another working car and still no dtc, all working except aircon compressor, if i force it with 12v on compresor starts cooling but outside fan not starts, but when go on output triger fan works, i also changed another fan and all same

There is a relay in the distribution box actuated by the FEM. I believe you have checked that.

Lastly I think the DME plays a role in allowing compressor to engage. Tried reprograming dme incase the DTC was coded out? It is the only thing I can think of.

I also exchanged fem, ecu, ihka, ike, rem, radio, replaced presure sensor, all interior temp sensors, outside temp sensor from another working car and still no dtc, all working except aircon compressor, if i force it with 12v on compresor starts cooling but outside fan not starts, but when go on output triger fan works, i also changed another fan and all same

There is a relay in the distribution box actuated by the FEM. I believe you have checked that.

Lastly I think the DME plays a role in allowing compressor to engage. Tried reprograming dme incase the DTC was coded out? It is the only thing I can think of

I have exactly same problem. tried to clone with another DME. still no compressor activation.

I also exchanged fem, ecu, ihka, ike, rem, radio, replaced presure sensor, all interior temp sensors, outside temp sensor from another working car and still no dtc, all working except aircon compressor, if i force it with 12v on compresor starts cooling but outside fan not starts, but when go on output triger fan works, i also changed another fan and all same

There is a relay in the distribution box actuated by the FEM. I believe you have checked that.

Lastly I think the DME plays a role in allowing compressor to engage. Tried reprograming dme incase the DTC was coded out? It is the only thing I can think of

I have exactly same problem. tried to clone with another DME. still no compressor activation.



I tryed complete fem+key+dme+rem+ike from another car and still nothing

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i cant find any relay for ac,wires from compressor go directly to FEM, also i can actuate compressor from fem with diagnostic. also tryed replacing compressor with bulbs and bulbs dont turn on when i press ac button,but when i actuate wit diag tool they light up.

In IHKA with ista, call up ecu functions, read all AC data temperatures, pressures etc with AC switched on and share. Maybe there is something in there that could guide us.

How was AC filled? Using weight? Does AC machine fill it without asking for Ac to be run?