Transmission Control Switch Circuit: Description
WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
When moving the shift lever into the S position using the transmission control switch, it is possible to switch the shift range position between "1" (first range) and "5" (fifth range).
Shifting up "+" once raises one shift range position, and shifting down "-" lowers one shift range position.