Toyota 2003 Avalon Owner's Manual page 196

The compass may not show the correct
direction in the following conditions:
D
The vehicle is stopped immediately af-
ter turning.
The compass does not adjust while the
vehicle is stopped.
D
The ignition switch is turned off imme-
diately after turning.
D
The vehicle is on an inclined surface.
D
The vehicle is in a place where the
earth's magnetic field is subject to in-
terference by artificial magnetic fields
(underground parking, under a steel
tower, between buildings, roof parking,
near a crossing, near a large vehicle,
etc.).
D
The vehicle is magnetized. (There is a
magnet or a metal object on or near
the roof.)
D
The battery has been disconnected.
The compass works to calibrate the direc-
tion automatically while the vehicle is in
motion, if deviation is small.
For additional precision or for complete
calibrating, see "CALIBRATING
COMPASS" below.
192
'03 AVALON U (L/O 0206)
Compass sensor
NOTICE
Do not put magnets or a metal object
on or near the roof of the vehicle.
Doing this may cause malfunction of
the compass sensor.
THE
2003 AVALON (OM41401U)
CALIBRATING THE COMPASS (deviation
calibration)
The direction display on the compass
deviates from the true direction deter-
mined by the earth's magnetic field. The
angle of deviation varies according to the
geographic position of the vehicle.
To adjust for this deviation, stop the ve-
hicle and push the "MODE" button several
times until "ZONE XX" appears on the
calendar display. Then push the "RESET/
ADJ" button, referring to the following map
to select the number of the zone where
the vehicle is.