4WD Input (Land Cruiser, Sequoia, Tacoma, Tundra & 4Runner)
WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2003 Toyota Tundra, 2003 Toyota Tacoma, 2003 Toyota Sienna, 2003 Toyota Sequoia, and 2003 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
On 4WD models, Engine Control Module (ECM) receives an input signal from transfer L4 position switch and transfer neutral position switch to indicate transfer case position.