Reflashing a VCDS interface based on the ATmega162 (typically a HEX-CAN or "fake" HEX-V2 clone) is necessary if the device has been "bricked" by an official software update or if the license has been revoked. Prerequisites
Hardware: A "real" ATmega162-based cable. Note that newer STM32-based clones use a different process.
Software: You will need a loader (such as VCDSLoader or VIIPlusLoader) and the corresponding firmware/EEPROM dump files.
Safety: Disable Antivirus software and disconnect from the Internet during the process to prevent the files from being deleted or the cable from being re-blocked. Reflash Methods Method 1: USB Flashing (via Loader)
If the cable is still partially recognized, you may be able to reflash it via USB using a specialized loader tool like VIIPlusLoader or VCDSLoader.
Download: Obtain the loader and VCDS software version recommended by your cable's seller. vcds atmega162 reflash 2021
Install: Install the VCDS software but do not run it yet. Delete any desktop shortcuts it creates.
Run Loader: Install the loader program and run it. Connect your cable to the PC's USB port.
Update: Click "Start" or "Update" in the loader. For many modern clones, the loader will automatically detect and update the firmware on first connection. Method 2: Bench Flashing (Direct to Chip)
If the USB method fails (cable is completely unresponsive), you must flash the ATmega162 chip directly.
Preparation: Open the interface housing to access the circuit board. Reflashing a VCDS interface based on the ATmega162
Connections: You will need an AVR programmer (like a USBasp or MiniPro TL866+). Connect the programmer to the ATmega162 pins (MISO, MOSI, SCK, RST, VCC, GND).
Flashing: Use software like AVRDUDE or the programmer's proprietary software to: Flash the Flash memory (.hex file). Flash the EEPROM (.eep file).
Fuses: Ensure the fuse bits are set correctly for the ATmega162 to operate at the required frequency (typically 16MHz). Usage Tips to Prevent Future Bricking
Never Update: Use only the VCDS software version provided with your loader. Official updates will often re-brick clone hardware.
Firewall: Block the VCDS.exe file in your Windows Firewall to prevent it from reaching the Ross-Tech servers. Set fuses (example for 16MHz external crystal) avrdude
Loaders: Always launch the diagnostic software using the Loader shortcut, never the original VCDS.exe.
Hex V2 Clone - Licence revoked - Help please? : r/CarHacking
11 Dec 2025 — Comments Section * _ne555_ • 4mo ago. If you say "Hex V2" vlone, I assume it's one of those old clones that is actually a Hex (V1) Reddit·r/CarHacking VAGCOM Interface Fix for ATmega162 | PDF - Scribd
avrdude -c usbasp -p m162 -U lfuse:w:0xFF:m -U hfuse:w:0x89:m -U efuse:w:0xFF:m
This feature outlines the process of restoring, updating, or converting a legacy VCDS (VAG-COM) diagnostic interface based on the Atmel ATmega162 microcontroller. The 2021 revision focuses on modernizing legacy "dumb" interfaces to support the latest VCDS software versions (20.x and newer), improving USB connectivity stability, and ensuring compatibility with the HEX-V2 protocol emulation layer.