Toyota FORTUNER 2021 Owner's Manual page 299

Four-wheel drive usage frequency
You should drive in four-wheel drive for at least 16 km (10 miles) each month.
This will assure that the front drive components are lubricated.
Shifting between H2 and H4
If you have trouble shifting in cold weather, reduce your speed or stop the
vehicle and reshift.
Shifting to L4
VSC is automatically turned off.
When driving on dry paved surface roads and expressway
Use H2 position. If the vehicle is driven in H4 or L4 position for a long time, a
warning buzzer sounds and a warning message is shown on the multi-infor-
mation display. In this case, follow the displayed message.
WARNING
While driving
Never turn the front-wheel drive control switch from H2 to H4 if the wheels
are slipping. Stop the slipping or spinning before shifting.
For normal driving on dry and hard surface roads, use H2 position. Driving
on dry and hard surface roads in H4 or L4 position may cause drive com-
ponent oil leakage, seizure, or other problems resulting in an accident.
Further, it may cause tire wear and increased fuel consumption.
Avoid turning suddenly in H4 or L4 position. If you do turn suddenly, the
difference in turning speeds between the front and rear wheels may have
a similar effect to braking, thus making driving difficult.
4-5. Using the driving support systems
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