Original Launch X431 Diagun III

Original Launch X431 Diagun III

Launch CReader VII+ Professional (CRP123)  Multi-Language Auto Code Reader

Launch CReader VII+ Professional (CRP123) Multi-Language Auto Code Reader

Original LAUNCH X431 IV X431 GX4 Master Update Version

X-431 IV Auto Scanner is the newly auto scanner from LAUNCH, which improved the features and function based on all feedback from the user's served by the X431 in their respectively fields of works. Compact Smartbox , main unit, printer, powerful diagnostic functions, fast and convenient update, universal 16PIN connectors, make it the first choice for technicians.X-431 IV Auto Scanner is the standard equipment for mechanics.te via Internet

Availability: In stock

Dealer Code: 86A and 86K

You will get an account to register in LAUNCH website,  in future, just go to download the update software by yourself.


Launch X431 IV Auto Scanner

It is the replacement of 431 Master,  Better than X431 Master, support Australian Holden and Ford, and Indian cars, support 12V/24V. 


X-431 IV is an classic,economical, simple, steady vehicle diagnostic tool newly released by Launch. It follows the open platform of X431 series, also it inherits many advantages of X431 including a wide coverage of vehicle models, powerful testing functions and accurate test data. At the same time,the unique rotatable diagnostic connector design is convenient for use's operating. It's a cost-effective diagnostic product on the market.



a) Diagnostic functions: trouble diagnosis of automotive ECU's; (Features including: read trouble code, clear trouble code, read data stream and special features), the diagnostic software completely consistent with that of X431, fully inherited the advantages of X431 including wide coverage of vehicle models and high precision test;

b)PDA functions: (handwriting with stylus, personal data management, English-Chinese dictionary, etc.);

c)Optional functions: creation of repair files and access to maintenance data);

d)Mini printer (can be used with X431PCCENTER to connect to the computer for storage of vehicle test data )


Components Sketch:


1, Diagnostic connector (rotatable)


2, SMARTBOX Power indicator


3, Indicator to show SMARTBOX sending data to the main unit


4, Indicator to show SMARTBOX receiving data from the main unit


5, Indicator to show SMARTBOX sending data to ECU


6, Indicator to show SMARTBOX receiving data from ECU


7, Serial port (to connect with PCLINK for extending functions)


8, Touch screen


9, HOTKEY button


10, Power button


11, Printer LF button (paper feed)


12, Printer ready indicator


13, Paper out (printed the data)


14, CF card slot (to install CF card)


15, Printer cover (to install printing paper)


16, Stylus slot ( to place the stylus)






Operating system: LINUX operating platform


Memory: 16MB


CF card: 1GB


Host power supply: DC12V


Host power: about 9W


Printer: Mini high-speed thermal printer


Display: large 240 320 touch inductive LCD screen, with backlight


Ambient temperature :-10-55


Relative Humidity: <90%


Product Dimension: 198mm 316mm 55.5mm




Car List:


Demo, Smart diagnostic software, Smart OBDII


America: America Ford, Chrysler, GM, Acrus, INFINITI, Lexus.


Australia: Australia Ford, Holden


Brazil: Brazil GM


India: Indonesia Daihatsu, Indonesia Suzuki, Mahindra, MARUTI, TATA


Japan: Daihatsu, Honda, JP Isuzu, Mazda, Mitsubishi, Nissan, Subaru, Suzuki, Toyota


Europe: Audi, Benz, BMW, Citroen, Europe Ford, Fiat, Jaguar, Lancia, Landrover, Opel, Peugeot,


Porsche, Renault, Romeo, Rover, Saab, Seat, Skoda, Transporter&V-Class, Volkswagen, Volvo


China: Brilliance, BYD, Changan, ChangCheng, Changhe, Chery, GEELY, Gonow, HaFei, JAC,


Jiangling, SGMW, Tianjin, Xiamen Golden, XinKai, ZhongShun, Zhongxing, ZOTYE


Korea: Daewoo, Hyundai, Kia, Ssangyong


Malaysia: Perodua, Proton


Russia: GAZ, VAZ


S.Africa: S.Africa Opel


Thailand: Thailand Isuzu




More Information
Technical Documents




What is difference between X431 IV and X431 Master? Which one better?

1. Function. 
X431 IV cover all the functions of X431 Master, X431 IV run faster than X431 Master, performance better than X431 Master. Launch company developed X431 IV based on X431 Master. X431 IV Main unit, SMARTBOX and Mini printer are together in one unit, the communication time between Smartbox and main unit is reduced and solve the communication-stop problem.

2. Car model. X431 IV contain about 72 car models, including Australian Holden,ford, India domestic car models and all other car models that X431 Master support. X431 Master only support 52 car models.

3. Language. X431 IV support more language than X431 Master.

4. X431 IV is belong to DBSCAR system. Customer can regirster account in WWW.DBSCAR website, and communicate with other engineer or car owner for car repair problem. Also you can obtain car repair information from Launch forum.

Now Launch factory has stop producing X431 Master, X431 IV is the replacement of X431 Master.

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