Update Ktag Clone From 225 To 270 Exclusive -
Yes. But with caveats.
Updating your KTag clone from 2.25 to 2.70 Exclusive transforms a legacy tool into a modern workhorse. You will be able to read/write 2024 ECUs that 2.25 can't even identify.
The Risk: If you interrupt power during the bootloader flash (Step 6), your clone is dead. No repair possible. The Reward: Access to MG1 and Trionic protocols, saving you $2,000 on a new original unit.
Version 2.70 (genuine) includes:
On clone hardware:
Therefore, 2.68 is the terminal version for this hardware revision.
It was 2 AM. Marco’s hands were steady but his mind was racing. He reconnected the ST-Link.
He erased the main flash but kept the bootloader. Then he manually flashed a known good 2.69 application that had the USB patch applied at the binary level—not via the unlocker. He used a HEX editor to verify the offset 0x1C4 patch: original value 0x00 0x00 0x00 0x00 changed to 0x01 0x02 0x03 0x04. A crude but effective clone handshake.
Then came the FPGA. On his clone, the FPGA was programmed by the STM32 at boot from a file called fpga.xsvf stored in the device’s internal SPI flash. He couldn’t update it via USB (dead), so he used the JTAG to program the FPGA directly using a Xilinx Platform Cable clone and iMPACT software. He loaded the fpga_269.bit file. update ktag clone from 225 to 270 exclusive
After the FPGA verified, he powered cycle the Ktag. Windows chimed again—this time with the familiar “Ktag Interface v2.69”.
| Component | Status pre-2.25 | Compatibility | |-----------|----------------|----------------| | MCU (STM32F407) | Authentic | ✅ Good | | FTDI chip | Clone (fake USB IDs) | ⚠️ Requires driver patch | | EEPROM (24C02) | Original clone data | ✅ Backed up | | Bootloader | Locked (v2.25) | 🔓 Unlock required | | Power supply | 12V stable | ✅ OK |
Backup performed: Full flash dump (STM32 + EEPROM) via ST-Link v2.
You need a USB-to-TTL serial adapter (CP2102 or FTDI). Connect to the Ktag's internal 4-pin header (3.3V logic!). Dump the current bootloader and firmware via STM32 Flash Loader Demonstrator. Save this .bin file to your desktop. If the new update fails, this is your only way back. On clone hardware:
| Test | Result | |------|--------| | USB enumeration | ✅ “KTAG V2.68” detected | | Self-test (internal) | ✅ All LEDs flash, relay clicks | | Read ECU (Bosch ME7.5) | ✅ Checksum OK | | Write ECU (partial) | ✅ Verified via checksum | | Tricore read (TC1766) | ✅ Password calculated | | CAN-FD test (on bench) | ✅ Up to 2 Mbps | | Protocol list | Shows ECUs up to 2024 |
No error codes, no unexpected resets.
For the casual user tuning older vehicles? Stick with 225. The stability is unmatched, and the risk of bricking your tool for features you won't use isn't worth it.
For the professional tuner or hobbyist working on 2015+ vehicles? Yes. The move to 270 unlocks a suite of ECUs that were previously inaccessible with the clone toolset. Therefore, 2
KTAG clones replicate the original Kess/KTAG interface for ECU read/write. Version 2.25 lacks support for many 2020+ ECUs (Bosch MED17.5.24, Sim18, TC17xx). Versions 2.68–2.69 add:
Version 2.70 (excluded) introduces hardware handshake with an Infineon security chip not present on clones.