Most users must agree original launch X431 diagun III is a very best universal car diagnostic tools for technicians. Since it is designed and developed by LAUNCH, that means it is high quality and work very well; and launch diagun iii has official website, the users are available to update diagun iii via Internet; the best cool thing for auto technicians is that launch x431 diagun 3 work with over 70 Car Models.

Launch X431 Diagun III is a new professional vehicle diagnostic tool designed and developed by LAUNCH for repair technicians.X-431 diagun smart, easy to carry, fully functional and convenient to use, and it’s the standard equipment for garage technicians.Original Launch X431 Diagun III  Bluetooth Update Online Free 1 year.

Let us have an overview on how to use original launch x431 diagun 3?

Step one: plug the X431 Diagun scan tool OBD-ii adapter plug into the car computer system OBD2 socket, and turn to the car ignition but never get started it. pls make the 12V electric power.

Step two: start up Launch X431 Diagun III scan tool. The screen display, please wait some seconds until Diagun III communicates with the car ECU.

Step three: Plug an X431 Diagun OBD2 reader right into a connection port on the car. X431 Diagun code reader is able to read out the trouble code and erase the trouble code.

Step four: navigate the menu to find the stored codes, the diagnostic codes which the car pc has saved into its memory. These codes are gathered above time within the CF card of X431 Diagun III, and until the vehicle battery has become disconnected, they need to remain in memory. The X431 Diagun scan tool will display these codes, together with standard knowledge info concerning the code.

Step five: write down the codes which might be shown on the X431 Diagun scan tool. After which you can investigation them on obd2tuning.com Automotive X431 Diagun mend manuals for the make and product of car may have a list of these codes and whatever they imply. Several OBD-ii codes be adopted by numerous quantity, and can begin using a letter, such as U-303, and they are tripped by sensors the laptop or computer displays regularly. When these sensors ascertain a little something is wrong with all the OBD2 Motor, the OBD2 code will be saved on you Pc, to ensure the automobile mechanic can figure out the problem and restore it.

(resouce  http://www.obd2tool.com/category-35-b0-Launch+X431.html)