BUDS 4.1.0 Not connecting.

Hi Lance

Go to the heavy maintenance manual.  There is a section on the BUDS and it discripes how to connect the system step by step.

chapter 76-10-00

Cheers

Three things to check. Turn battery power on, turn key switch for both A&B on and any switches for the ignition in your plane, turn backup / emergency power switch on. You should see the A&B Lane lights up in the top left hand corner of the screen light up green to show you are connected. Pick the correct BUDS screen you want to use. Pay attention to the screen during downloads and or fault log clearing as it tells you to either turn off the backup power and in a few moments to turn it back on or to cycle the switch off the back on depending on what you're doing.

Hi, Lance - 

I second what Roger shared. I have a Rotax 912iS and use a BUDS dongle. 

In order for my BUDS to register the ECU data, I need to turn on the Master switch, both Lane A and Lane B switches AND the ECU back-up battery switch. 

That wasn't explicitly clear in the video I watched, either :) 

Hope this helps.