Chevrolet 2007 Corvette Owner's Manual page 112

To adjust for compass variance do the following:
1. Find your current location and variance
zone number on the following zone map.
2. Press and hold the on/off button until a Z and
a zone number appears in the display. The
compass is now in zone mode.
3. Keep pressing the on/off button until the
desired zone number appears in the display.
Release the button. After approximately
112
four seconds of inactivity, the new zone
number will be locked in and the compass/
temperature display will return.
4. Calibrate the compass as described below.
Compass Calibration
The compass may need calibration if one of the
following occurs:
•
After approximately five seconds, the display
does not show a compass heading (N for North,
for example), there may be a strong magnetic
field interfering with the compass. Such
interference may be caused by a magnetic
antenna mount, magnetic note pad holder,
or a similar magnetic item.
•
The compass does not display the correct
heading and the compass zone variance is
set correctly.
In order to calibrate, CAL must be displayed
in the mirror compass windows. If CAL is not
displayed, push the on/off button for approximately
12 seconds or until CAL is displayed.
The compass can be calibrated by driving the
vehicle in circles at 5 mph (8 km/h) or less until
the display reads a direction.