Caterpillar Machine Repair Guide

Here is a guide on how to build connection between laptop and CAT ET4 diagnostic adapter . To connect the Communication Adapter 3 (“Comm Adapter 3”) to the PC, perform the following steps: Step 1: Align and attach the DB25 connector end of the USB PC cable to the “PC cable” end connection on the Comm Adapter 3. Step 2: Plug the USB Connector end of the PC cable into the USB port of the PC To connect the Comm Adapter 3 to the data link, perform the following steps: Step 1 After connecting the Comm Adapter 3 to the PC, connect the DB15-style connector end of the data link cable to the “Data Link” connection on the Comm Adapter 3. Step 2 Connect the other end of the data link cable to the service connector on the product. The lights on the front of the Comm Adapter 3 will glow and then will sequentially turn off from the top (“Data Link” end) to the bottom (“Computer” end) of the device. The Power LED will turn color from orange to red, and then the blue "USB" LED will blink onc

To run the CAT ET 2022A diagnostic service tool,and make it work with CAT ET4 478-0235 the following 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.   CAT ET Diagnostic Software PC Requirements Recommended Configurations  PC containing a 2.0 GHz dual-core processor  3GB RAM  3GB of available hard disk drive  DVD-ROM drive  15.4 inch XGA Screen (1280x1024 compatible)  Microsoft Windows™ 7 Professional or Windows 8 Professional (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 9 or newer is recommended. Note: