Communication Method
WARNING: This page is about a different car, the 2006 Mitsubishi Montero. 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), sunroof motor assembly (incorporating the sunroof-ECU), RV meter and these components communicate with each other.