› M1 Support Forum › 1141 = Expansion Module Trouble Message › Reply To: 1141 = Expansion Module Trouble Message
January 12, 2026 at 10:54 am
#9812
Gary Hansen
Brad, I redoubled my efforts and found the M1XRF2H. I checked the voltage and it was 13.86. It is the original unit – it has not been replaced. I will go back and check the resistance across Data A and Data B. There are no secondary power supplies providing power to bus devices. Should I just go ahead and order a new M1XRF2H?