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Compass Calibration
If after a few seconds the display does not show a
compass direction, (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, note pad holder, or similar object. If the
letter C or CAL appears in the compass window, the
compass may need to be reset or calibrated.
To calibrate the compass, do the following:
1. Make sure CAL is displayed in the display. If CAL is
not displayed, press and hold the compass button
until CAL is displayed.
2. While CAL is displayed, drive the vehicle in circles
at 5 mph (8 km/h) or less until the display reads a
direction.
Compass Variance
Compass variance is the difference between earth’s
magnetic north and true geographic north. If the mirror
is not adjusted for compass variance, the compass
could give false readings.
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 the vehicle is
driven outside zone eight. Under certain circumstances,
such as a long distance, cross-country trip, it will be
necessary to adjust the compass variance.
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 compass button until a Z and a
zone number appear on the display.
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