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Frequently asked questions
Files formats (master, slave and backup)
Master file The master file can be freely modified, it is not encrypted. It contains all the data constituting the engine mapping. Slave file The slave file cannot be freely modified. It can only be processed by the master to which the slave tool is linked. The slave file is a file in .zip format that contains the same information as the backup file but also the data constituting the engine mapping. The information it contains is encrypted and intended to be modified by a master.
Bosch ECUs password reading
Some Bosch ECUs are protected by a password. When you perform a read, Autotuner automatically takes care of reading the password and then reads the data from the ECU. For Bosch ECUs with password, it is not necessary to proceed in two steps, Autotuner takes care of everything.
Meaning of the LEDs
Power (white) It indicates the presence of 12V output. When flashing, it means that the ECU is powered. Be extremely careful when the ECU is powered because there is a risk of short circuit with a metal object. Status (blue) It flashes to indicate that the interface is working properly. If it does not flash, it is recommended to unplug and restart the interface. USB activity (orange) It flashes when data is transferred via USB.
Manually update vehicles list
The list of vehicles is automatically updated each time the application is started. Nevertheless, in order to manually update the list of the compatible vehicles, you can click on the "menu" button and then "update ecu list".
All the vehicles compatible with Autotuner are listed at the following address: Compatibility List
Meaning of the buttons
When you have selected a vehicle, the interface displays the operations window. Different buttons are present on this window, here are their meaning: Identify The tool checks the communication with the connected ECU and displays the references of it. Help Access to the help interface : step-by-step instructions and ECU/OBD locations. Write Tuned file or backup: Select a file on your computer and then write it to the ECU. Original from server: Download the file corres
Use precautions - Safety
Use of Autotuner tool and its accessories implies the respect of basic safety precautions in order to reduce the risk of fire, electric shock and injury, including the following: : Avoid exposing the display to direct sunlight for long periods of time. Do not allow liquid, small particles or other foreign objects to get into the tool or accessories. Do not insert foreign objects into the connectors of the tool. The tool can not be brought into contact with water or any other fluid sour
Virtual Read vs Normal Read
What’s a virtual read ? Virtual read Some ECUs cannot be directly read. This feature is simply not implemented by the manufacturer because he never needs to read the content of the car’s ECU, only flash it for updates. So, the virtual read is the only way to read the ECU data. The virtual read file is an original file that corresponds to the software number of the ECU actually installed in the car. Virtual read is fast, the file is instantly downloaded from the server in a couple of seco
To access the list, click on "Select a vehicle" All the vehicles compatible with Autotuner tool are represented in lists. Compatible brands Models available for the selected brand Available engines for the selected model (sorted by fuel type) Reading method available for the selected engine For advanced users, a search function is available in the upper right corner of the window. This allows you to search and then select an ECU or a specific vehicle.
VAG FRF selection window (update, dowgrade and back to stock)
This feature lets you select and flash a complete and original FRF file from a list of files compatible with the selected ECU. It is available for both master and slave tools on the following ECUs : DCM6.2V EDC17C46 EDC17C54 EDC17C64 EDC17C74 EDC17CP44 EDC17CP54 EDC17CP74 MED17.1.10 MED17.1.27 MED17.1.62 MED17.5.21 MED17.5.25 PCR2.1
Autotuner hardware and software customization (logo)
You can apply your own branding on both software and hardware. Autotuner tool printed with your logo turns into an effective communication tool that will allow you to enhance your brand image. Software customization Large logo This logo is located at the top right corner of the Autotu
Backup file (how-to-use)
What is a backup file? The backup file contains all the memories of the MCU. The extension used is .bak and corresponds to a .zip file. It can be decompressed with any decompression software that supports .zip format. This file is automatically saved during boot or bench read in the "Autotuner ECU backups" folder. This folder can be accessed by opening the Windows File Explorer and pasting the following address: %userprofile%documentsAutotuner ECU backups ( The Windows File Explorer