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  1. Flash ECU - This button is how you activate the flash routine to change files on your ECU over OBDII

  2. Console - This is where important flashing information is displayed in real time. Map Notes, completion percentage, etc, will be displayed here during the flash process.

  3. Profile - Profile affords multiple different logging profiles which can be customized to cater to specific systems we are focusing on trying to improve. Every M-Tuner will come with a “General” logging profile.

  4. Start Monitoring - This will activate live data as well as datalogging. All data displayed is subsequently recorded. Each datalog consists of .csv and .ldat files. When emailing datalogs to M-Engineering please email the .ldat files as well.

  5. Actuators - This is where you will find actuators to turn on and off certain functions. Such as turning on and off the fuel pump to pump out fuel, or turning radiator fans on to help cool the car down in the pits after a long track session.

  6. Logging Rate & License - Your current logging rate is displayed in this panel. When logging your sample rate is displayed in Hz. The License portion displays who this particular version of M-Tuner is licensed to. The license allows your vehicle to communicate with M-Tuner.

  7. Dyno Mode - This panel is where you can enable and disable dyno mode. This is required for the vehicle to run properly on any dyno.

  8. Read/Clear Faults - Here you can read McLaren specific faults and clear faults in all modules.

  9. License - Here you can add additional licenses or pick the proper license for the vehicle you are working on. This is particularly useful for shops who have many customers who are running M-Tuner.

  10. Map Notes - With this button you can open your M-Tuner files to view the map notes. This is useful if you forget your map slots.


If this is the first flash or datalogging you are completing on M-Tuner, licensing of the software is needed. Click on “Read Info” and you will be prompted to enter in your Customer Name for the license. You can simply put whatever you like in the box such as your full name and the year/make/model of the car. Once this step is complete this allows you to gain full control of reading and clearing faults as well as datalogging.


Flashing Your ECU

*During the flash process, the vehicle must be in the on position but the engine off and not running*


  1. Be sure you have installed the proper drivers delivered with your M-Tuner. openport_setup.exe will install the proper drivers if you haven’t done so.

  2. Open M-Tuner and connect the OBD dongle to your vehicle and PC via the supplied USB cable.

  3. If you have a profile open and a good connection to the vehicle “Start Monitor” (4), “Dyno Mode” (7), and “Clear Faults” ( 8 ) will be in bold and no longer grayed out.

  4. “Start Monitor” (4) will now begin displaying live data in the monitor panel (5) and your logging speed (6) will be displayed near the bottom.

    1. Whenever you start to monitor a datalog is created automatically. When you first datalog a folder called “Datalogs” will be created in the same folder as M-Tuner. This is where all datalogs are saved.

  5. Datalogs are saved as both a .csv and a .ldat.

    1. .csv files are files you are welcome (& encouraged) to review. Knowing what to look for in datalogs can be a great tool in early detection of an issue.

    2. .ldat files are encrypted files that contain proprietary calibration data.

      1. We are always available to review datalogs.

        1. If you have a datalog you’d like us to review shoot us an email at with the subject header “McLaren Log Review” Please be sure to also include your VIN in the email.

  6. Our Datalogging Parameters page can help you make sense of most vital monitors.