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Best Quality CAT Caterpillar ET 2021B/2021A​​/2019C​ Diagnostic Adapter III Cat Communication Adapter 3 (Real Caterpilla

  • Item No.  CA153
  • History: 318  sold
  • Software Version :

  • Quantity
    Express Shipping Service    Estimated delivery time: 3-5 days »
    Affected by the epidemic, there will be delays in transit time.
  • Stock  150
  • Weight:  2.5KG
  • Rate:  comment rank 45 () Write a Review
  • Member Benefits  Shipping  Return Policy




Technical Support



Best Quality CAT Caterpillar ET 2021B/2021A/2019C Diagnostic Adapter III Cat Communication Adapter 3 (Real Caterpillar ET3 Adapter 3)

Caterpillar ET 3 Main Features :
1. Latest Version:2021B/2021A/2019C(optional)
2. Supported Operating System: Windows 7 32 bit, Wnidows 7 64 bit, Windows 8/8.1 32 bit, Windows 8/8.1 64 bit, Windows 10 32 bit, Windows 10 64 bit
3. We will activate it after installing 2021B/2021A/2019C version software.(After the installation , please contact us help you active the software by remote)
4. Supported Language: Chinese(Simplified), Danish, German(Germany), French(France), Portuguese (Portugal), Japanese, Spanish (tradition), Italian(Italy), English(America)
5. Support caterpillar diagnostic till 2021

Caterpillar ET 2021B is a good replacement for the CAT ET 2019C, 2021A Electronic Technician Diagnostic Software. 2021B Caterpillar Electronic Technician software With CAT ET 3 Cat caterpillar adapter 3 support caterpillar diagnostic till 2021.

CAT Caterpillar ET 2019A Install Video:

Support list of CAT Caterpillar ET Diagnostic Tool :

With the CAT Diagnostic Tool, you can:
View active and logged diagnostics
View events where irregularities occurred and were logged by the ECM
View the status of a group of parameters (temperatures, pressures, etc.) simultaneously
Record and log performance data
Graph a group of status parameters
View the current configuration of an ECM
Change ECM configurations
Perform diagnostic tests
Perform calibrations
Print reports and diagnostic results
For some machine and engine products, additional functionality has been included with the service tool program

Product Description 
CAT Caterpillar ET Diagnostic Tool from Caterpillar provide the capability to access Electronic Control Modules (ECMs) from a personal computer. Many job-critical tasks can be performed with an electronic service tool. The user can display the status of a group of parameters (temperatures, pressures, etc.) simultaneously, view active and clear logged diagnostics, display the current configuration of an ECM and much more. The service tool works with a communication adapter to allow connection to an ECM. A graphical interface makes this software quick to learn and easy to use. A separate pull-down menu for each function enhances the "ease of use." The version and identification of the ECM is automatically retrieved and is displayed on a summary screen when the program is started. Diagnostic tests and calibrations can also be performed.

CAT Caterpillar ET Diagnostic Tool enable service technicians to reprogram ECMs, reconfigure control system parameters, fine tune performance or diagnose the root cause of a failure the first time. These powerful tools allow service personnel to display and analyze vital performance and health information from any system quickly and accurately. The service tool communicates with any system using ATA (J1708), J1939 or the Caterpillar proprietary data link networks. The service tools provide information and features needed to help a technician diagnose problems and perform repairs and to customize and personalize the operation of a product. By allowing customers to design flexibility and configurability into a product, Caterpillar service tools stretch beyond the capabilities of preprogrammed ECMs or onboard display systems.

PC, Communication Hardware, and Cable Requirements

To run the service tool, the next PC, communication hardware, and cable requirements must be met. NOTE: The minimum PC Configurations should not be used as a standard when buying new personal computers for service tool purposes. If the existing equipment meets these minimum requirements, it will run the service tool.

PC Requirements
Recommended Configurations
PC containing a 2.0 GHz dual-core processor
3GB of the available hard disk drive
DVD-ROM drive (optionally)
15.4-inch XGA Screen (1280x1024 compatible)
Microsoft Windows™ 7 Professional or Windows 8 Professional, Windows 10 Professional (Not tested with Home Edition) (Note: Windows 8 RT is not supported)
RS232 port with 16550AF UART or compatible (for use with Comm Adapter II)
USB 1.1 or 2.0 port (for use with Comm Adapter 3)
Ethernet RJ45 connector
Built-in pointing device or mouse
For security purposes, Microsoft Internet Explorer version 11 or newer or Microsoft Edge is recommended.
Note: The most recent version of Microsoft Internet Explorer may not be validated to work with the service tool.
Wi-Fi (for the Wireless Comm Adapter 3)

The list of supported CAT machines and engines can be found below:
Electric Power
Electric Power Generation
Marine Power Systems
Oil and Gas

Articulated Trucks
Asphalt Pavers
Backhoe Loaders
Cold Planers
Feller Bunchers
Forest Machines
Hydraulic Mining Shovels
Knuckleboom Loaders
Material Handlers
Motor Graders
Off-Highway Trucks
Road Reclaimers
Site Prep Tractors
Skid Steer and Compact Track Loaders
Track Loaders
Underground - Hard Rock
Underground - Longwall
Underground - Room and Pillar
Utility Vehicles
Wheel Dozers
Wheel Excavators
Wheel Loaders
Wheel Tractor-Scrapers

Original Factory Caterpillar ET3 Adapter III Compare With OEM Caterpillar ET Diagnostic Adpater III
1. Original Factory CAT ET can use once pluged, no need install the USB drive, the software can automatic realize it for ET3 Adapter, and the machine can automatic weld the high quality Circuit board, quality will be more reliable.
2. The OEM Caterpillar ET Diagnostic Adapter III need use USB Drive to install, and need choose the COM Port, and  in the software ET also need choose ET2 then can be used. 

The Details as follows:

Packing list:
1.Real CAT et3 Comm Adapter III (it's real cat et 3,not adapter 2,please check Communication port) 
2.J1939/J1708 Cable (from device to your truck) 
3.ET software DVD (for windows XP or windows7 32bit system)
4.14PIN Cable(for new truck)

5. 6pin cable ( For old trucks )
What's New - 2021ANo significant new features or feature enhancements 
What's New - 2020CNo significant new features or feature enhancements 

What's New - 2020BTrainer Update – 299D3The 299D3 Skid Steer Loader has been added to the Trainer application.
What's New - 2020AProduct Status Report UpdatesThe Product Status Report has been updated to include throttle configuration information.Built-in Factory Password GeneratorThe experimental feature allows you to decode (18-Bit passwords not supported) factory passwords 

What's New - 2019CIndication of Selected Communications AdapterThe service tool now displays the selected communications adapter when the service tool is disconnected. The adapter name is displayed in the status area at the bottom right of the service tool window.End of Support for Windows 7Microsoft is ending extended support for Windows 7 as of January 2020. The service tool will be ending support for Windows 7 as of the 2020A release.

User Comment(Total 42 Customer Reviews)

  • by Ray Lademan,Oct 21,2021

    do I need to register to your website before I can purchase the product from you ?

    Reply #1 by Cara Oct 21,2021
    Hi , you can make order online directly without rgister an account or you can register first , both ok , thank you


  • by Cherno m Jallow,Sep 23,2021

    What software will work with a 2008 caterpillar C7 engine ?

    Reply #1 by Cara Sep 23,2021
    Hello, this link can work for your model , no matter which software version , but if you want to do new trucks , you can choose latest software version , thank you


  • by kennisha thompson,Aug 21,2021

    When will my order ship?

    Reply #1 by Cara Aug 21,2021
    Hello , could you please tell us your order number ? we will check the order status for you , thank you


  • by Kevin Peachee,Jul 17,2021

    Will this work on on highway trucks as well?

    Reply #1 by Cara Jul 17,2021
    Hello , which exactly model of your highway trucks ? thank you


  • by Jebin Jacob,Jun 23,2021

    does it have the password generator?

    Reply #1 by Cara Jun 23,2021
    Yes , it come with password generator ,thank you


  • by Rose Bogardus,May 07,2021

    Does any computer work with cat et

    Reply #1 by Cara May 07,2021
    Yes , most laptop after 2008 years can support cat et software ,thank you


  • by Leigh-Ann Botha,Feb 20,2021

    I’m just enquiring does this come with complete software for caterpillar services to diagnostic and for how long for a year or 6 months

    Reply #1 by Cara Feb 20,2021
    Hi the software for cat et 3 have no time limitation , can use it forever , thank you


  • by domenick lopano,Jan 20,2021

    What’s the best operating system, windows 10 pro will work?

    Reply #1 by Cara Jan 20,2021
    Hello , you mean software support system ? If so windows 10 pro can work with the software ,but not install any antivirus software on it , thank you


  • by rolando sampang,Dec 12,2020

    how long and how much to ship to kentucky, United States of America

    Reply #1 by Cara Dec 12,2020
    Hi , it usually need about 5-7 days ship by DHL , thank you


  • by Thomas G. Morris,Oct 26,2020

    will this machine work for 2006 cat c15 ?

    Reply #1 by Cara Oct 26,2020
    Yes , it can work for 2006 cat c15 , thank you


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About Us - Professional Auto Diagnostic Tools Supplier. We provides car diagnostics tools for Do-It-Yourself and professional automotive mechanics. If you have any problems, don't hesitate to contact us, send email to or chat online. We are well organized by a group of rich-experienced design experts who have been engaging in auto diagnostic tools for more than 10 years. FREE, Professional & Unlimited Technical Support, Factory Price!

Shipping Terms:

a     1) Items will be sent to all the countries over the world.This package will be sent by Hongkong Airmail Post,EMS,UPS or DHL.

b     2) Items will be checked carefully before sent out.

c     3) We will use air bubbles to wrap the items carefully.

Shipping Time:

Usually the shipping time is about 5-7 days via DHL, UPS, TNT and Fedex Express, 15-30 days via POST AIR to Worldwide, but Because the COVID-19 Global Pandemic recently, the delivery date will may be delayed. We are sincerely sorry to bring all inconvenience to you.
Note: We hope it arrive on time but since this is an international delivery, shipping time will be highly depended on the courier company and local customs/duties. Thank you for your understanding

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If you are not satisfied with your purchase .please contact us quickly, we can exchange one to you,but buyers is responsible for the returning shiping cost .
If you have any item problem, just email us quickly, we will do our best to slove it in 24 hours, please don’t leave bad feedback before contacting us, it is not the best way to slove problem. thank you!
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