Chevrolet avalanche 2002 用户手册

In order to calibrate, CAL must be displayed in the
mirror compass windows. If CAL is not displayed, push
in the COMP button for approximately eight seconds or
until CAL is displayed.

The compass can be calibrated in one of two ways:
D Drive the vehicle in circles at five mph (8 km/h) or

less until the display reads a direction, or

D drive the vehicle on your everyday routine and after

several turns the compass will become calibrated and
will display a direction.

The mirror is set in zone eight upon leaving the factory.
It will be necessary to adjust the compass to compensate
for compass variance if you live outside zone eight.
Under certain circumstances, as during a long distance
cross

-

country trip, it will be necessary to adjust for

compass variance. Compass variance is the difference
between earth’s magnetic north and true geographic
north. If not adjusted to account for compass variance,
your compass could give false readings.

To adjust for compass variance, do the following:

1. Use the COMP button located at the bottom of 

the mirror.

2. Press and hold the COMP button for three seconds

until a zone number appears in the display.

3. Find your current location and variance zone number

on the following zone map.

4. Press the COMP button on the bottom of the 

mirror until the new zone number appears in the
display. After you stop pressing the button in, 
the display will show a compass direction within 
a few seconds.