FreeSSM

FreeSSM is an open-source project that provides a toolset of adjustments and diagnostic tools for Subaru vehicles. It deals with control units for the engine and the transmission of an automobile and can be operated from desktop systems, laptops or car computers.

Supported models include Impreza, Forester, Tribeca, Liberty, Baja and Outback. The software connects to the interface of the unit through the OBD-II serial port and depends on a VAG-COM cable in order to run properly.

Note that operating the program requires a high degree of tech knowledge regarding the vehicle and it should not be maneuvered by the driver of the car while behind the wheels. It is best to make use of it in a safe environment, such as a garage.

FreeSSM relies on a short and uncomplicated installation process and adopts a rather simple interface that doesn’t take long to understand. As mentioned, the focus falls on the engine and on the transmission equipment, which are controlled from two different interfaces. However, many of the commands are common.

Its most important highlights include the possibility to execute TCU resets (e.g.: for the check engine lights), as well as to display real-time data for various measuring blocks and to perform all sorts of system tests for various components of the engine: the fuel pump, the radiator fan or the air suction valve, to name a few.

The functionality of the software can be truly evaluated by professional mechanics and car engineers, but it is said that it can easily replace more complex monitoring tools such as the Subaru Select Monitor. While the latter is a paid option, FreeSSM is an open-source project and can be used commercially free of charge.