Toyota Tundra 2005 Owner's Manual page 583

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ADVANCED FUNCTIONS
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Position/direction calibration
1. Touch the scroll arrows to move the
cursor to your desired location.
"Enter"
Touch the switch.
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2. Touch either the or switch to ad-
just the direction of the current vehicle
position mark.
"Enter"
Touch the switch and the map
screen will be displayed.
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Tire change calibration
The tire change calibration function will be
used when replacing the tires. This func-
tion will adjust the mis-calculation caused
by the circumference difference between
the old tires and new ones. If this proce-
dure is not performed when tires are re-
placed, the current vehicle position mark
may be incorrectly displayed.
To perform a distance calibration procedure,
"Tire Change"
touch the switch on the
"Calibration" screen.
The message appears and the quick distance
calibration is automatically started. A few
seconds later, a map screen will be displayed.