Circuit Description
WARNING: This page is about a different car, the 2004 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
Unless the driver's door is opened then closed within 43 seconds after the ignition switch is turned from ON to OFF, the instrument panel J/B (body ECU) supplies the power source to the master switch.
HINT:
If a malfunction is detected in the jam protection pulse sensor and limit switch, the operation after the ignition switch is turned OFF will be prohibited by the fail-safe function. At this time, the AUTO UP and DOWN operations will be prohibited, as well.