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Originally Posted by keithc
I'm wondering whether anyone can throw some light on this problem.
I have a 2003 E46 with Sat nav. The software is updated and I have a copy of 2008-1 High Navigation disc currently in the drive. Everything was fine until the clocks went back the other week. When I altered the clock, the computer alters the time +1 hr GMT and it does this within a few minutes of me altering it. I've narrowed it down to the sat nav disc as when I put my original 2003 disc in, the clock stays set. I've checked on the service menu and the clock is correct via the satellite in the menus.
Is there a way of adjusting the info on the disc via Navtweak or Navcoder? I have another copy of same disc and it does it with that as well. I still have the image on my hard drive but don't know what I'm looking for.
Any help on the matter would be appreciated, thanks.
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How strange!
Firstly. the GPS time is always in UTC and is not used by the car to alter the cars clock
The cars clock is actually in the instrument cluster, when the nav adjusts the time it sends a time adjustment command to the cluster.
I've never seen, or heard, of this sort of problem and never thought it would be possible. I never believed the map disc had anything to do with time and UTC offset.
Look on the map disc and read the LSC and PSC files in WordPad or Word (you need a unix capable text editor to read the files). See if there is anything about clock/UTC/GMT in there.