The only way I can think of is to not connect the CAN wires (red CDC plug) but power and GPS and wait for the GPS to set the correct date/time. As long as CAN is not connected your RNS-E will take the GPS as source for date/time. Once CAN gets connected it expects the date/time from there, which won't work becaused it's not done this way in a B5.todd1010 said: