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How to Fix USB Interface Not Found Error with VCDS



How to Fix USB Interface Not Found Error with VCDS




If you are using a Ross-Tech USB interface to run VCDS software on your Windows PC, you may encounter an error message that says "USB Interface Not found! USB Library Version 03:02:07". This error means that VCDS cannot communicate with the USB interface and cannot access your vehicle's diagnostic data. There are several possible causes and solutions for this error, depending on your setup and configuration.


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One common cause of this error is that your USB interface is not recognized by Windows or by the VCDS software. This can happen if you are using a virtual machine, such as Parallels Desktop on a Mac, or if you have other USB devices connected to your PC that may interfere with the interface. To fix this issue, you need to make sure that your USB interface is properly connected and configured in Windows and in VCDS.


Here are some steps you can try to resolve this problem:


  • Unplug and replug your USB interface into a different USB port on your PC. Avoid using USB hubs or extension cables.



  • Open Device Manager and look for the USB interface under "Universal Serial Bus controllers". It should be named something like "Ross-Tech HEX-V2" or "Ross-Tech HEX-USB+CAN". If you see a yellow exclamation mark or a red cross next to it, it means there is a driver problem. Right-click on the interface and select "Update driver". Follow the instructions to install the latest driver from Ross-Tech's website[^1^].



  • If you are using a virtual machine, make sure that the USB interface is assigned to the Windows guest system and not to the host system. For example, if you are using Parallels Desktop on a Mac, you need to go to Devices > External Devices and select "Connect to Windows" for the USB interface[^1^].



  • In VCDS, go to Options > Test and select "USB" as the port type. Click "Test" to see if VCDS can find the interface. If not, try changing the port number until you find one that works.



  • If none of the above steps work, you may need to use a different PC or device to run VCDS. Some users have reported success with using cheap Windows tablets or laptops that have a USB port[^1^]. However, make sure that the device meets the minimum system requirements for VCDS and that it has enough battery power.



We hope this article has helped you fix the USB Interface Not Found error with VCDS. If you have any questions or feedback, please feel free to contact us or leave a comment below.


Another possible cause of the USB Interface Not Found error with VCDS is that the USB interface is faulty or damaged. This can happen if the interface has been exposed to moisture, heat, dust, or physical impact. To check if the interface is working properly, you can look at the LEDs on it and see if they indicate any problem.


According to Ross-Tech's website, the LEDs on the USB interface have different meanings depending on the interface type and the mode of operation. Here are some common scenarios and what the LEDs should show:


  • If you have a HEX-V2 interface and you plug it into your PC without connecting it to a vehicle, the green LED should blink slowly and the red LED should be off. This means that the interface is in "bootloader mode" and is ready to receive firmware updates from VCDS.



  • If you have a HEX-V2 interface and you plug it into your PC and connect it to a vehicle, the green LED should blink rapidly and the red LED should be off. This means that the interface is in "normal mode" and is communicating with VCDS and the vehicle.



  • If you have a HEX-USB+CAN interface and you plug it into your PC without connecting it to a vehicle, the green LED should be on and the red LED should be off. This means that the interface is in "normal mode" and is ready to communicate with VCDS.



  • If you have a HEX-USB+CAN interface and you plug it into your PC and connect it to a vehicle, the green LED should blink rapidly and the red LED should be off. This means that the interface is in "normal mode" and is communicating with VCDS and the vehicle.



  • If you have a KII-USB or TWIN-USB interface and you plug it into your PC without connecting it to a vehicle, both LEDs should be off. This means that the interface is in "sleep mode" and is waiting for a signal from VCDS or from the vehicle.



  • If you have a KII-USB or TWIN-USB interface and you plug it into your PC and connect it to a vehicle, both LEDs should blink alternately. This means that the interface is in "normal mode" and is communicating with VCDS and the vehicle.



If you see any other LED pattern or no LED activity at all, it may indicate that there is a problem with the USB interface or its connection. You can try unplugging and replugging the interface, using a different USB port or cable, or resetting the interface by pressing the reset button (if available). If none of these steps help, you may need to contact Ross-Tech for support or replacement. 0efd9a6b88


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