When the engine switch is on (IG) and the rear sunshade is raised, moving the shift lever to R causes the Park/Neutral Position switch (A/T) or back-up light switch (M/T) to send a reverse-linked signal to the main body ECU LH. Then the main body ECU LH sends the signal through the multiplex communication line to the rear sunshade relay. The relay then lowers the rear sunshade.