Pioneer AVIC-Z1 - Manual (Page 185)

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• If your vehicle is turned on a turntable or simi-
lar structure.
• If your vehicle’s wheels spin, such as on a
gravel road or in snow.
• If you put on chains, or change your tires for
ones with a different size.
• If trees or other obstacles block the GPS sig-
nals for a considerable period.
• If you drive very slowly, or in a start-and-stop
manner, as in a traffic congestion.
• If you join the road after driving around a large
parking lot.
• When you pass around a traffic circle.
• When starting driving immediately after start-
ing the engine.
• If you turn your navigation system on while
driving.
Some types of vehicles may not output a speed
signal while driving at just a few kilometers per
hour. In such a case, the current location of your
vehicle may not be displayed correctly while in a
traffic congestion or in a parking lot.