Lexus 2003 LS Owner's Manual page 80

GAUGES, METERS AND SERVICE REMINDER INDICATORS
16l074b
To rectify the deviation, stop the vehicle, and push and hold the
"RESET" button on the steering pad for more than 6 seconds.
"DRIVE IN CIRCLES" appears on the display. Perform the
following calibration.
CAUTION
Do not adjust the display while the vehicle is moving.
Be sure to adjust the display only when the vehicle is
stopped.
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16L075
Drive the vehicle slowly (at 8 km/h (5 mph) or lower) in a circle
until the direction is displayed. If there is not enough space to
drive in a circle, drive around the block until the direction is
displayed.
After driving in 1 to 3 circles in the above method, calibration
is complete with the direction shown on the display.
If calibration cannot be performed because the vehicle is
magnetized., take your vehicle to a Lexus dealer.
If you want to cancel the calibration before it is complete, push
and hold the "RESET" button on the steering pad more than 6
seconds. To calibrate the compass again, push and hold the
same button more than 6 seconds. After "DRIVE IN CIRCLES"
appears on the display, follow the calibration procedure above.
A Do not perform circling calibration of the compass in a place
where the earth's magnetic field is subject to interference by
artificial magnetic fields (underground parking, under a
steel tower, between buildings, roof parking, near a
crossing, near a large vehicle, etc.).