Lexus 2003 SC430 Owner's Manual page 193

AUDIO
(c) Selecting a station
Tune in the desired station using one of the following methods.
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Seek tuning: Push the "SEEK" button. The radio will begin
seeking up or down for a station of the nearest frequency and
will stop on reception. Each time you push the button, the
stations will be searched automatically one after another.
Preset tuning: Push the button ( 1–6 ) for the station you want.
The button number ( 1–6 ) and station frequency appear on the
display.
Manual tuning: Turn the "AUDIO–TUNE" knob. The radio will
step up or down to another frequency.
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To scan all the frequencies: Push the "SCAN" button briefly.
"SCAN" appears on the display. The radio will find the next
station up the band, stay there for a few seconds, and then
scan again. To select a station, push the "SCAN" button a
second time.
To scan the preset stations: Push the "SCAN" button until
you hear a beep. "P.SCAN" appears on the display. The radio
will tune in the next preset station up the band, stay there for
a few seconds, and then move to the next preset station. To
select a station, push the "SCAN" button a second time.