How do you check transmission fluid in 1999 Toyota Avalon?

To check the Transmission Fluid in a 1999 Toyota Avalon, first ensure the vehicle is parked on a level surface and the engine is warmed up. With the engine running, locate the transmission dipstick, usually found near the back of the engine compartment. Remove the dipstick, wipe it clean, reinsert it, and then pull it out again to check the fluid level. The fluid should be within the marked range; if it's low, add the appropriate transmission fluid through the dipstick tube.