Power Window Operation Linked With Transmitter
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
When the unlock switch of the ignition key switch (transmitter) is kept pressed for approximately 2.5 seconds or longer, all the door windows can be opened, and is stopped by releasing the switch.