What to do when you have a broken Tech2 device Common problems RS-232 Test – LoopBack Not Connected Repair Replacing RJ45 by mini USB connector (JohnJocke’s USB Modification) No Communications with vehicle, may be a bad VCI Filed under: - @ 17:58 « How to test your Tech2 device ⇐ More Pages ⇒ Which USB to serial adapter will work for me »