Oldsmobile 1999 Intrigue - Manual (Page 103)

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Compass Calibration
To place the compass into calibration mode, press both
map lamp buttons and hold for over eight seconds
until the letter “C” is displayed in the mirror
compass window.
The mirror can be calibrated in one of two ways:
D drive the vehicle in circles at 5 mph (8 km/h) or less
until the display indicates a direction, or
D drive the vehicle on your everyday routine.
Compass Variance
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:
1. Find your current location and variance zone number
on the following zone map.
2. Press and hold both map lamp buttons on the bottom
of the mirror, for five to eight seconds, until the zone
number appears in the display.
3. Press the right lamp button to increase the zone
numbers or press the left lamp button to decrease the
zone numbers. After you have selected your zone
number, the display will show a compass direction
after five seconds. (Compass calibration may be
necessary. See “Compass Calibration” in the Index.)