Update Ktag Clone From — 2.25 To 2.70

After updating to 2.70, immediately make a full disk image of the SD card using Win32DiskImager. Store it on your PC. Next time Windows corrupts the card, you restore in 5 minutes, not 5 hours. Have you successfully updated your Ktag clone? Share your experience in the comments below. Bricked your tool? I’ve included the recovery pinout diagram below. [Diagram not shown, but typically involves shorting MCLR to ground].

If you are reading this, you likely own a Chinese Ktag clone (also known as a Kess V2’s big brother for ECUs). You’ve probably been running version 2.25 for years. It works—mostly. But as vehicles evolved (Bosch MD1, Siemens SIM18, Delphi DCM6.7), your trusty 2.25 clone started throwing errors: "Protocol not found," "Checksum error," or worse, "Authentication failed."

happy with older Japanese or European cars. 2.25 remains remarkably stable for pre-2016 vehicles. Update Ktag Clone From 2.25 To 2.70

This guide is for educational purposes. Updating clone hardware violates the original manufacturer’s terms. Use at your own risk.

However, this is a dangerous minefield. Unlike official Ktag units, clones require a specific dance of bootloader updates, firmware flashing, and software patching. One wrong move, and you brick a $200 tool. After updating to 2

Go to Device Manager → Unknown Device → Update Driver → Browse → Let me pick → Have Disk → Point to the FTDI folder from your 2.70 package. Select version 2.12.00.

If you decide to proceed, follow every step in this guide precisely. Backup your old SD card. Use a stable power supply. And never, ever update over USB alone.