KESS3 is a programming tool that can read and write ECU software through OBD, Bench or Boot, depending on the control unit and the protocol available for it. The video also shows the cables and adapters used with the equipment.

The tool can read and clear diagnostic fault codes and record vehicle parameters in data logs. These functions are useful for initial checks, but they do not replace a full manufacturer diagnostic system. The video also mentions an on-road power estimate; this is not equivalent to a measurement on a chassis dynamometer.

AutoChip also offers practical support with using the tool, including reading and saving files, submitting them for calibration and writing them back to the ECU. A protocol promotion is mentioned in the video, but the specific dates and prices are not included in this article.