Navigation System Distance Calibration
01-11-02, 06:08 AM
#1
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Navigation System Distance Calibration
Page 62 of the 2001 GS430 Navigation system Owners Manual says that distance calibration compensates for the change in tire circumference when the tires are replaced.
It claims to provide a more accurate indication of current vehicle position. Does it also correct the odometer and speedometer?
How does the nav. system accomplish whatever it is that it does?
It claims to provide a more accurate indication of current vehicle position. Does it also correct the odometer and speedometer?
How does the nav. system accomplish whatever it is that it does?
01-11-02, 01:24 PM
#2
It does not caliberate for odometer and speedometer for my understanding. Both are only offer the so call "reference information". The way Nav caliberation is compairing the data on database to wheel rotation and GPS signal, and position the mark on the map more accurate and distance travel or route calculate more accurate.
01-12-02, 03:59 PM
#4
When car is in stop position, the calibration does actrually "receiving" the at least 4 satellites signals to readjusts the actrually map display to its correct location. In normal use of Nav, system only "compares" the actually GPS signals with its last knowing position and "calculated" positon based on speed sensor, steering angles, travel direction and wheel rotations, ect. Over the time, depends the way individual driving style, it will adds some of discrpency from time to time. If you using routing a lot, it actrually helps re-calibrate more often. High speed long distence travel, will normally means less self caliberation due to computer "thinks" it is easy to calculate the position because it is quicker than every time to get signals than determine the actrual position. I hope that makes sence to you. The bottom line is the calibration like ask computer to "reset" from this "location" rather than calculate using the "reference" location.
Last edited by hzhao; 01-12-02 at 04:02 PM.
04-01-02, 09:13 AM
#5
Lexus Test Driver
hzhao-
Question: should you then calibrate distance while car is parked outside (not inside a garage) so that it can coordinate with the satellites at that point?
Question: should you then calibrate distance while car is parked outside (not inside a garage) so that it can coordinate with the satellites at that point?
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