Toyota Lexusc Owner's Handbook Manual page 283

STEERING WHEEL AND MIRRORS
Compass (type B only)
The compass indicates the direction in which the vehicle
is heading. The illustration shown above indicates the
vehicle is heading north.
264
Push the "COMP" switch to turn the compass system on
and off.
If the ignition switch was turned off with the system on, the
system will automatically turn back on when the ignition switch
is turned on.