ECU Definition Files

Overview

ECU Definition Files describe the memory layout of the ECU so that GWv4 can present the information stored in the ECU in a logical way and display/edit values using physical units such as Celsius or Fahrenheit rather then the internal representation used by the ECU.

Before you can connect to an ECU or edit Calibration Files, an ECU Definition File for the ECU will therefore need to be installed into GWv4.

Installation

There are a few ways to install ECU Definition Files:

1. Drag & Drop your ECU Definition file onto GWv4 to install it.
2. Open a Calibration or attempt to connect to an ECU. GWv4 will guide you through the process of locating an ECU definition file.
3. Use the ECU Installations dialog. From the main menu go to Installations... and click the ‘Install…’ button.

The installation process archives ECU Definition files to an installation folder in the ProgramData folder in the EcuDef format.

ECU Definition File Formats

• GIN (*.gin) - GEMS Proprietary ECU Definition file.
• A2L (*.a2l) - ASAM Standard ECU Definition file. Requires an XCP License. A2L files have the file extension “.a2l”.
• EcuDef (*.ecudef)- Compressed archive that, amongst other things, contains either a GIN file or an A2L file. EcuDef files take up considerably less disk space than GIN or A2L files. EcuDef files can also contain other supporting files.