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  #1  
Old 01-06-2006, 08:36 AM
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NAV not showing correct position

It just started doing this today, MKIV drive, says I'm about 60km from where I really am. Drive north it shows south, east for west etc. The GPS isn't showing any little green dots (box on top left corner) - any ideas?


thx
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Old 01-06-2006, 11:06 AM
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a thought. I had all the electronics out of the vehicle the other day and I'm wondering if I possibly forgot to plug the antenna back into the drive. It was probably using the wheel sensors initially. So is the GPS antenna wire much like a mini coax that plugs into the back of the MKIV? I think I plugged that into the CD changer by mistake.... advice?

thx
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Old 01-07-2006, 05:41 AM
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Yes there is a GPS Antenna cable... it's a thin black one I think, like you said... looks like mini coax. You need to plug it into the back of the nav drive.

I didn't know it could fit into the CD changer.
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Old 01-07-2006, 06:47 AM
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I have the same issue, but it goes away after a 15-30 minute drive, that is, the system correctly locates the vehicle. I have never unplugged the antenna cable, so I do not think this is the cause (although it might be). In my case the problem appears as in the following situation.

I drive through long highway tunnels where the reception is lost. If the reception is not restored soon after exiting a tunnel and the map is not very accurate at that specific location, the navi system attempts to calculate the position of the car assuming some nearby location (on a road) and following the car movement sensors. This completely disorientates the system to a point that it reboots itself (after 15 minitues or so) and the problem is corrected.

The higher my road speed, the more easily does it lose the correct location and the more it takes to restore things after reception has been restored. As I said, it rarely takes more that 20 minutes at moderate speeds (80 km/h or so) to correctly locate itself again. The more difficult it is for a gps to operate properly (high buildings, cloudy day, etc) the worse it is. In a city, usually the time it takes to wait at traffic lights is enough to correct its position once connection is restored.

Hope it helps...
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Old 01-07-2006, 06:26 PM
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yup it was unplugged on mine. I think some CD changers/amps have the coax option for dsp, although from what I understand they've eliminated that and used the other plug-ins for dsp....
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