Renolink mjukvara – komplett guide för installation, uppdatering och felsökning - Felkodsläsare

Renolink Software – complete guide for installation, update, and troubleshooting

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Renolink Software – complete guide for installation, update, and troubleshooting

Renolink is a powerful tool for Renault and Dacia that enables UCH matching, airbag programming, key coding, and EEPROM/FLASH reading/writing, among other functions. For everything to work stably, the correct software, proper drivers, and a few important Windows settings are required. This guide shows – step by step – how to install and use Renolink on Windows 10/11, how to update the database, and how to resolve common errors.

Brief version: Install driver (CH340 or FTDI), unzip Renolink program, run as administrator, select correct COM port, lock baud rate, update database, always back up before writing to ECUs.

Content

  1. 1) What is Renolink software?
  2. 2) System requirements & preparations
  3. 3) Drivers: CH340 vs FTDI (USB-serial)
  4. 4) Installation – step by step (Windows 10/11)
  5. 5) First start & basic settings
  6. 6) Updates & databases
  7. 7) Backups & security
  8. 8) Troubleshooting – common errors & solutions
  9. 9) FAQ – frequently asked questions
  10. 10) Useful links on Felkodslasare.se

Renolink software is the Windows program that communicates with your Renolink OBD2 cable (via USB). The program provides access to device-specific functions for Renault/Dacia, e.g., UCH matching, airbag clear, key management, and programming of certain control units. Unlike generic OBD apps (which primarily read fault codes), Renolink handles vehicle-specific databases and procedures.

2) System requirements & preparations

  • Windows 10 or 11 (64-bit recommended)
  • USB port (preferably directly on the computer – avoid unreliable hubs)
  • Driver for your cable's USB circuit (CH340 or FTDI)
  • Microsoft Visual C++ Redistributables (usually x86 & x64)
  • Administrator privileges on the computer
  • Stable power to the car (charger/maintainer recommended for programming)
Important: When writing to control units (EEPROM/FLASH), an interruption can cause damage. Use a battery charger on the vehicle and turn off power-saving features on the computer.

3) Drivers: CH340 vs FTDI

Renolink cables typically use one of the following USB-to-serial circuits:

  • CH340 (from WCH) – requires WCH driver
  • FTDI (FT232RL etc.) – requires FTDI driver

You can see which one you have in Device Manager when the cable is connected: "USB-SERIAL CH340" or "USB Serial Converter (FTDI)". Install the corresponding driver before starting the Renolink program.

4) Installation – step by step (Windows 10/11)

  1. Download the Renolink software from your product page on Felkodslasare.se. Unzip the ZIP file to a short path, e.g., C:\Renolink\.
  2. Install the driver (CH340 or FTDI). Disconnect the cable, run the driver installation, restart the computer, reconnect the cable.
  3. Verify COM port: Open Device Manager → Ports (COM & LPT). Note the COM number (e.g., COM3).
  4. Visual C++: Install/update Microsoft Visual C++ Redistributables (x86 and x64) if the program complains about missing DLLs.
  5. Run as administrator: Right-click on Renolink.exe → Run as administrator. Grant the program an exception in your antivirus if it warns (false positive is common for niche tools).
  6. Select COM port in Renolink and set baud rate as recommended (often 115200). Disable power saving for USB in Device Manager → USB Root Hub.
  7. Test communication: Ignition on (II), connect OBD, open Renolink, click Connect and read basic info. If OK → proceed.
Tip: Always use a short, reliable USB cable directly into the computer. Avoid extensions and poor hubs.

5) First start & basic settings

  • Language: Choose Swedish/English depending on the package.
  • Profile: Save your profile and default COM port.
  • Logs: Enable logging to file for troubleshooting.
  • Backup directory: Specify a folder for automatic backups.

6) Updates & databases

Renolink uses vehicle databases (definition files, procedures). Your download includes an up-to-date database. When an update is released, you place new files in the program's \database\ directory according to the instructions in the package. Restart the program after updating.

Good practice: Write down the version number you are running (app + database) in your order history so you know what worked on a particular vehicle.

7) Backups & security

  • Always backup: Read out and save EEPROM/configuration before writing anything.
  • Stable voltage: Use a battery charger/maintainer during flashing.
  • One change at a time: Verify results between steps.
  • Legality: Use the tool legally and on vehicles you have the right to modify.

8) Troubleshooting – common errors & solutions

Renolink does not detect the cable

  • Missing/incorrect driver – install CH340/FTDI correctly.
  • Wrong COM port – check in Device Manager and select the same in Renolink.
  • Permissions – run the program as administrator.

"Access denied" / Port busy

  • Close other OBD programs (they lock the COM port in the background).
  • Restart the computer, connect the cable last.

Unstable connection / Timeouts

  • Change USB port and cable, avoid hubs.
  • Disable USB power saving in Device Manager.
  • Check vehicle battery voltage.

Antivirus flags the program

  • Add an exception for the Renolink folder (false positives occur).
  • Verify the file's source (only from Felkodslasare.se).

"No ECU response"

  • Ignition in position II? Some modules require the engine to be off.
  • Wrong menu/vehicle selection – select the correct model/year.
  • Module sleep – unlock the car, wait 60 seconds and try again.

Writing failed

  • Ensure stable voltage (charger).
  • Wrong database/file – check compatibility.
  • Restore from backup if needed.

9) FAQ – frequently asked questions

Does Renolink work on Windows 11?

Yes, Renolink works on Windows 10 and 11. Make sure the driver and Visual C++ Redistributables are installed and that you run the program as administrator.

Which driver should I choose – CH340 or FTDI?

It depends on which USB circuit your cable has. Check Device Manager when the cable is connected. If it says CH340 → install WCH driver. If it says FTDI → install FTDI driver.

Do I need to do anything with the COM port settings?

Yes, note the COM number and select the same in Renolink. Set the baud rate to 115200 and disable power saving for USB ports.

Do I need internet for use?

No, the program runs locally. Internet is only required to download updates and any license checks depending on the version.

Can antivirus stop the program?

Yes, some antivirus programs can give false positives. Add an exception for the program directory if you are sure of the source (Felkodslasare.se).

How do I update the database?

Place new database files in the \database\ folder according to the included instructions, then restart the program.

Can I brick a module?

The risk exists during an interruption while writing. Use a battery charger, stable USB, and follow the guide. Always back up first.

Does Renolink work for key coding?

Yes, on many models. Always check model support and have all necessary codes/key blanks ready before you start.

The program shows "No ECU response". What do I do?

Check the ignition position, correct vehicle selection, wake the module from sleep mode, and ensure good contact in the OBD socket.

Do I need a driver every time?

No, the driver is installed once per computer. If you change the USB port, the COM number may change – check the setting in Renolink then.

Can I use a USB hub?

We recommend direct connection to the computer for stability, especially when writing.

Are all Renault/Dacia models supported?

No, support varies. See the product page for model and function support and update the database if necessary.

Where are backup files saved?

Select a dedicated backup folder in the program's settings, e.g., C:\Renolink\Backups\. Back up regularly.

Can I run in a virtual machine (VM)?

It can work but is not recommended for beginners due to USB pass-through and latency. Preferably run on bare-metal Windows.

Error "Access denied" on the COM port

Close other OBD programs (e.g., generic scanner apps) and restart the computer. Run Renolink as administrator.

Which USB cable is recommended?

Short, shielded USB-A to USB cable of good quality. Avoid long extensions and cheap hubs.

Can I restore if something goes wrong?

Yes, if you have taken a backup, you can usually restore. Always document the original VIN/configuration.

How do I contact support?

Please send order number, Windows version, driver (CH340/FTDI), COM port, and log file to info@felkodslasare.se.

10) Useful links on Felkodslasare.se

HowTo: Install Renolink on Windows 10/11

  1. Download and unzip Renolink to C:\Renolink\.
  2. Install the correct USB driver (CH340 or FTDI) and restart the computer.
  3. Connect the cable and note the COM port in Device Manager.
  4. Start Renolink.exe as administrator and select the COM port.
  5. Set the baud rate, disable USB power saving, enable logging, and backup folder.
  6. Test communication with ignition in position II. Update the database if needed.
Note: For all writing operations – use a battery charger and do not touch the OBD connector.

Last updated: November 3, 2025