How do you check the transmission fluid on a 2012 Toyota Highlander?

To check the Transmission Fluid on a 2012 Toyota Highlander, first ensure the vehicle is on a level surface and the engine is running at idle. Locate the transmission dipstick, which is usually found near the back of the engine bay. Remove the dipstick, wipe it clean, reinsert it fully, then remove it again to check the fluid level; it should be between the "full" and "add" marks. If needed, add the appropriate type of transmission fluid through the dipstick tube.