The File Extensions Database

.A2L File Extension

  • Developer by: ASAM MCD-2MC
  • Category: CAD Files
  • Format: Text

What is an .A2L file?

.A2L is ASAP2 ECU Description File

Standard file format specified by the ASAM MCD-2MC (ASAP2) workgroup; describes the interfaces, measurements, and parameters of an Electronic Control Unit (ECU), an electronics component that is used to control various parts of a motor vehicle; helps in the process of transforming an ECU model design into a physical ECU; also helps in the process of calibrating and testing the ECU.

The A2L format has been adopted widely by the "xCU" development, testing, and calibration community. It is used by products such as AVL CRETA Calibration Data Management, a solution for the calibration of powertrain systems (automobile propulsion).

Programs that open ASAP2 ECU Description File
File Viewer Plus
AVL CRETA Calibration Data Management
NI ECU Measurement and Calibration Toolkit

How to solve problems with A2L files

  • Associate the A2L file extension with the correct application. On :
    Windows: Right click on any A2L file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.A2L files". Mac: Right click (or Ctrl-click) the A2L file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .A2L is ASAP2 ECU Description File. Because only the current version supports the latest A2L file format. Search, therefore, e.g. on the ASAM MCD-2MC manufacturer website after an available .A2L is ASAP2 ECU Description File update.
  • To make sure that your A2L file is not corrupted or virus-infected, get the file again and scan it with antivirus software.