Can Communication Signals Control: Notes
WARNING: This page is about a different car, the 2013 Subaru Forester, 2012 Subaru Forester, 2011 Subaru Forester, and 2010 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
By interchanging information between control modules such as the TCM, ECM, ABSCM & H/U, etc., the modules are controlled in accordance with the vehicle's driving conditions.
In CAN (Controller Area Network) communication, each control module is connected with 2 lines and a large amount of information is interchanged through such a small number of wiring. Each control module sends and receives information and reads only the necessary information for its own purpose.