[cmautoelectrical]

Hi

I have a 2010 Fiat 500. I had no comms with the airbag ecu. Sent the ecu away for repair and upon its return I now have comms. 

Only problem now is I a have permanent fault of B0101 control unit power supply. 

I have a good ground and battery voltage at the ecu. 

I have spoken to the person that repaired the ecu and he said he has replaced various components so the fault must be with the car and not the ecu. 

Any help appreciated. 

Thanks