Lexus 2003 LS Owner's Manual page 597

Current Position Calibration
D Tire change calibration
The tire change calibration function is to
be used when the tires are replaced. This
will adjust for any possible change in tire
circumference from the old tires to the
new ones. If this procedure is not per-
formed when tires are replaced, the cur-
rent vehicle position mark may become
incorrect.
To execute the fast distance tire calibration
"Tire change"
procedure, touch the
switch on the Calibration screen.
2UE030
The above message appears and the fast
distance calibration is automatically started.
A few seconds later, the Map screen returns.
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