Chevrolet 2005 Blazer Spezifikationen Seite 164

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Compass Variance
Variance is the difference between magnetic north and
geographic north. In some areas, the difference
between the two can be great enough to cause false
compass readings. If this happens, follow these
instructions to set the variance for your particular
location:
Setting the Variance
1. Find your location on the zone map. Record your
zone number.
2. Press and hold both the ON/OFF and the US/MET
buttons in the COMP/TEMP mode.
3. After five seconds, VAR CAL (Variance Calibration)
will appear on the display. When it does, release
both buttons.
4. Press US/MET until your zone number appears on
the display.
5. Press ON/OFF to set your zone number. Your
variance is now set and the display will return to
the COMP/TEMP mode.
Automatic Compass Calibration
The compass is self-calibrating, so it does not need to
be manually set. However, if CAL (Calibration) is
displayed, the compass will need to be calibrated. You
may also place the compass in a noncalibrated
mode by pressing and holding the ON/OFF and US/MET
buttons at the same time while in the COMP/TEMP
mode. After about 10 seconds, the compass will display
CAL and you can release the buttons. Drive the
vehicle in a complete 360 degree circle three times at a
speed of less than 5 mph (8 km/h), and the compass
will function normally. Once the calibration is complete,
the display will return to a compass reading.
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