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My nav screen say a program cannot be read
check out if any disk is got internally stuck up in the unit.check it and remove.press the upper right corner and then the lower right corner of the nav screen. if this is not helping and still the same problem then its a firmware problem.
the nav firmware should be upgraded.get the latest firmware update from the dealer.then check out.
2007 Lexus LS...
on Sep 06, 2013
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