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Disclaimer: For educational purposes only. Cloning violates Ross-Tech’s IP.

Tools needed:

Steps (short version):

  • Read current flash (backup) – many clones have a read-protection bit set. You must brute-force it via debug port (SWD for STM32, ICSP for PIC).

  • Patch the firmware:
    Find the USB request handler (offset ~0x1C00 in STM32 version). Replace:

    0x7C, 0x01, 0xA1, 0xC0 ... (original check)

    with NOPs or a jump to a routine that always returns 0x00 (success).

  • Flash patched firmware – then use vcdsloader.exe (a custom loader that bypasses the main EXE’s integrity check) to run v22.3.1 without triggering the brick routine.

  • Software reports wrong interface or firmware:
  • Intermittent disconnects:

    • To extend the life of your HEX-V2 clone running VCDS 22.3.1:

    | Do ✅ | Don’t ❌ | |-------|----------| | Keep a copy of the working driver INF file | Never click “Update Firmware” in VCDS | | Use a USB isolator (ADUM3160) to protect from car voltage spikes | Don’t install VCDS 23.x or newer over 22.3.1 | | Block Ross-Tech updates via firewall (outbound rules) | Don’t plug clone into USB 3.0 ports if issues occur – use USB 2.0 | | Store the clone in an anti-static bag | Never run VCDS on a laptop connected to a charger that causes ground loops |

  • Install VCDS 22.3.1 (not newer — clones often fail with 23.x or 24.x).
  • In the VCDS install folder, run DriverSetup.exe or VCDS_Installer_22.3.1.exe as admin.
  • When asked, point to the clone’s supplied driver (usually a modified FTDI driver with VID/PID spoofed).

    • The VCDS 22.3.1 HEX-V2 clone remains a popular low-cost diagnostic tool for VAG cars, but it requires careful handling. By following the installation steps precisely (disabling automatic driver updates, manually installing the clone driver, and never updating firmware), you can avoid most failures. If your clone does brick, an ST-Link reflash or simple CAN transceiver replacement can bring it back to life.

    Remember: Genuine Ross-Tech cables come with lifetime support and free updates. Clones are a gamble. But for the budget-conscious DIY mechanic, understanding repair and install procedures for a bricked HEX-V2 clone can save money and keep your diagnostic capabilities alive.

    Disclaimer: This article is for educational purposes. Cloning and using counterfeit diagnostic equipment may violate laws in your jurisdiction and void vehicle warranties. Purchase official Ross-Tech products when possible.

    Below are a few options for a forum post, depending on where you are posting (e.g., a diagnostic forum, a Facebook group, or a tech support board).

    If you are posting this on a public forum, be aware that some forums have strict rules against discussing "cloned" or pirated hardware. You may want to check the forum rules before posting, or phrase your question carefully (e.g., referring to it as an "unbranded interface" or "third-party cable").