I turned off the power management where it shuts down the USB ports to save power and I shut down everything in the tool tray and now everything is working. If either of those vehicles communicate well enough with VCDS to run and save a complete Auto-Scan please send it for review.Ĭlick to expand.I screwed up and didn't test it again before I changed things. Please click on and the next time you have this issue and let us know what the exact results are. Lastly, something on the A4 could be causing the communication disruption but it would be rather unlikely that the Jetta has a similar problem with one of the installed modules. Next, I'm assuming that laptop is running on battery power but please confirm that you are not using a power inverter of any sort and that the USB wire is plugged directly into the laptop without an extension of any sort. If you haven't done so already I would disable all non-essential start-up programs to rule out a conflict and try all of the USB ports on that PC. It looks like you have a HEX-USB+CAN interface so the COM port buffer wouldn't apply but sections 2.4 and 2.5 in our FAQ include the most common communication issues: Please confirm that this short serial number is printed on that HEX-USB+CAN interface at some point: HC458650
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