Subaru 2000 Forester Owner's Manual page 157

Interior equipment
HS6010BA HS6011BB
1) Press the "ADJ" switch for the compass setting mode.
NOTE
D The compass starts blinking in this mode.
D This mode can be canceled by pressing the "ADJ" switch
again.
2) Make certain that it is safe to do so and then drive the vehicle in a
circle until the compass stops blinking. You may have to complete
more than one circle to perform this calibration.
NOTE
D When setting is completed, all blinking disappears.
D The setting mode is automatically cancelled if the "ADJ"
switch is pressed in the middle of setting or if the setting is not
completed within 2 minutes.
The motion indicator bars move in two patterns according to the
vehicle speed.
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