Toyota 2009 Tundra Owner's Manual page 308

3-1. Using the air conditioning system and defogger
CAUTION
n To prevent the windshield from fogging up
Do not use
difference between the temperature of the outside air and that of the wind-
shield can cause the outer surface of the windshield to fog up, blocking your
vision.
NOTICE
To prevent battery discharge
n
Do not leave the air conditioning system on longer than necessary when the
engine is stopped.
284
during cool air operation in extremely humid weather. The