Automobile decoder, also known as automobile fault diagnosis instrument, is a professional automobile maintenance detection tool. You can read the computer data in the failed system. Generally, it can be divided into two types, one is for automobile engine or circuit failure. The other is aimed at the central control of automobile doors, which is mainly used for the matching, testing and maintenance of automobile remote controllers. Criminals just used its function of reading central control data and turned a harmless instrument into a tool for committing crimes.