6395 ecm OE and moates apu1 and TP rt. When I put it all away over a year ago data logging and chip burning worked fine. Went to use it yesterday and no data sream showed up on tp dash. I checked both switches on Apu were to the right ( 8192 and pass through ). The aldl to apu cable is the same one I have always used. I am able to erase and burn a chip so don't think there is a problem with comm ports as the apu talks to the laptop. Does anyone have a test or idea I can try.