Automatic Transmission Fluid Temperature Sensor
WARNING: This page is about a different car, the 2003 Toyota RAV4, 2002 Toyota RAV4, 2002 Toyota Highlander, 2001 Toyota RAV4, and 2001 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
Automatic Transmission Fluid (ATF) temperature sensor, located on wiring harness inside transaxle oil pan, converts fluid temperature into a resistance value, which is input to ECM. See Fig 1.