Вот так:
CHECK FLUID LEVEL
HINT:
Drive the vehicle so that the engine and transaxle are at normal
operating temperature.
Fluid temperature: 70 - 80°C (158 - 176°F)
(1) Park the vehicle on a level surface and set the parking
brake.
(2) With the engine idling and the brake pedal depressed,
shift the shift lever into all positions from P
to L position and return to P position.
(3) Pull out the dipstick and wipe it clean.
(4) Push it back fully into the pipe.
(5) Pull it out and check that the fluid level is in the HOT
position.
Если просто, то на прогретой коробке при включенном двигателе.