Communication Method
WARNING: This page is about a different car, the 2005 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
As shown in illustration, signal wires used exclusively for transmitting multiplex signal data connect the ETACS-ECU, front-ECU, column switch (incorporating the column-ECU) and sunroof motor assembly (incorporating the sunroof-ECU) and these components communicate with each other.