Navigation System 155
Frequently Asked Questions
The vehicle position icon on the map “lags” a short distance
behind, especially when I arrive at an intersection. Is there
anything wrong?
No. When at an intersection, the system is unaware of the width of the
intersecting road. Large differences in vehicle position can indicate a
temporary loss of the GPS signal. See GPS Reception Issues on page 129.
While I drive, my screen shows white dots (“breadcrumbs”)
on it. What do they mean?
These are called “breadcrumbs.” If you drive more than 1/2 mile from
mapped roads, the off-road tracking feature begins to function. See Off-road
Tracking on page 71 and 115.
How can I get rid of the white dots (“breadcrumbs”) from my
screen?
Go to “Vehicle” in the SETUP screen (Other), and set Off-road
Tracking to OFF, then return to the map. See page 115.
A road that I selected to avoid is being used when routing.
What is wrong?
When you “draw” your area to avoid, make sure to select sections of roads
that include at least one intersection. See page 110.
My elevation (shown when I display the current position)
seems to fluctuate even though my elevation has not changed.
This is normal and due to errors in satellite position. The elevation can vary
+/- 100 feet. See System Initialization on page 127.
My elevation is missing on the “current position” screen.
Why?
If the GPS antenna cannot receive signals from at least four satellites, the
elevation is not displayed. Try moving the vehicle into an open area. If the
elevation is zero, or below sea level, the elevation is also not displayed.
Problem Solution
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