Design News article on improving fuel efficiency includes an OBD-II interface circuit and a discussion of how fuel efficiency can be calculated from airflow and vehicle speed.interface vendor offers source code for Windows that is also reported to work in Linux under Wine.the classic "Jeff" interface OBD-II RS232.Freediag open source software that works with six different cables.Opendiag simple OBD-II to RS232 cable and information about Volkswagen-specific extensions.OBD-II resources Open Source Software and Interfaces 3.6.1 Control the connection to the scan tool.3.5.3 Allow non-root users to use the scan tool.3 How to get it working on openSUSE / Linux.To understand these figures, corresponding to the parameters (PID), we have included a small program free of charge in our software. Understanding sets of figures in the tables The exact procedure is explained on theĮOBD-Facile software page. In exchange for this contribution, the software functions are available for free. We asked the users of our EOBD-Facile software to help create this list by returning their "log" file of the connection to their vehicle. The tables list the support modes and their parameters. In general, the more recent your vehicle, the more diagnoses you can do on it. The second piece of useful information is the "level" of implementation of the standard.The list can be used (if your vehicle is on it), to know in advance if you can buy an ELM interface and whether it will work with your vehicle. While the official dates for implementing the standard have been defined, manufacturers have implemented the standard more or less early.Compatible vehicles can be diagnosed using generic (multibrand) ELM327 interfaces. The tables on this page represent lists of vehicles that are compatible with the OBD standard (EOBD or OBD2 depending on the country).
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