Murano FWD V6-3.5L (VQ35) (2004)
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Mirror Compass Operational Description
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This electronic compass is able to display 8 primary directions: N, NE, E, SE, S, SW, W, NW.
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All standard compasses determine direction relative to Magnetic North; however, this electronic compass is designed to display direction relative to
True North.
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The difference between Magnetic North and True North varies from place to place across the surface of the earth.
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This electronic compass must be "told" approximately where it is on the earth's surface so that the Magnetic North reading can be properly converted
into a True North display.
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To tell the electronic compass where it's at, the earth is separated into numbered "Zone Variances" (see zone variance). The Zone Variance number
in which the compass is to function must be entered into this electronic compass.
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Each zone is magnetically about 4.20 wide. Typically, anything under 22.50 total zone change is not noticed on the electronic compass display.
However, over 22.50, a reading may be off by one or more primary directions.
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On long trips, a vehicle may leave its original zone and enter one or more new zones. Generally, you do not need to reset the compass zone if you
travel between 3 or 4 zones, such as business travel or vacation. The typical driver will not notice any difference on the display within 3 or 4 zones.
However, if the vehicle is "permanently" moved to a new location, it is recommended that the compass zone be reset.
Compass Troubleshooting
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The electronic compass is highly protected from changes in most magnetic fields. However, some large changes in magnetic fields can affect it.
Some examples are (but not limited to): high tension power lines, large steel buildings, subways, steel bridges, automatic car washes, large piles of
scrap metal, etc. While this does not happen very often, it is possible.
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During normal operation, the Compass Mirror will continuously update the compass calibration to adjust for gradual changes in the vehicle's
magnetic 'remnant" field. If the vehicle is subjected to high magnetic influences, the compass may appear to indicate false headings, become locked,
or appear that it is unable to be calibrated. If this occurs, perform the calibration procedure.
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If at any time the compass continually displays the incorrect direction or the reading is erratic or locked, you need to verify the correct zone variance
(see steps 1, 2 and 3 of the Compass Calibration Procedure).
Compass Troubleshooting Chart
Mirror Compass Calibration Procedure
NOTE:
The compass calibrates itself under normal driving conditions. However, occasional circumstances may cause the compass to operate inaccurately.
Example:
