Compass Calibration - Cadillac 2008 SRX Owner's Manual

Compass Operation
Press the on/off button once to turn the compass on or off.
When the ignition and the compass feature are on, the
compass will show two character boxes for approximately
two seconds. After two seconds, the mirror will display
the current compass direction.

Compass Calibration

If after two 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
appears in the compass window, the compass may need
to be reset or calibrated.
The mirror can be calibrated by driving the vehicle in
circles at 5 mph (8 km/h) or less until the display reads
a direction.
The compass can be calibrated by pressing and holding
the on/off button until a C is shown in the compass
display.
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.
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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 zone map that follows.
2. Press and hold the on/off button until a zone
number appears on the display.