TomTom 930 GPS location shows to the left of road im on

ChrisJones · Occasional Visitor Joined: Oct 04, 2003 Posts: 28

Hi. I have just become the proud owner of a TomTom 930 after using an Ipaq with navigator for many years. I went on my first journey today and the journey to my destination appeared fine. on the way back, the blue arrow showing my car location was to the left of the actual road I was on. this caused TomTom to constantly try and reroute me from parallel roads onto the actual road I was on. One of these was the M3 travelling south where I kept getting 'turn left' instructions. I switched off and on the unit several times with no difference. As soon as the GPS picked up again (which was almost instantly) it was again out of position from the road. I got back to the office, searched the net to no avail and then a few hours later drove home. the GPS appeared to be correctly positioned on the road all of the way home. Has anyone else encountered this? Is there a GPS calibration that needs running? I also noticed an issue when I had an Ipod connected and my bluetooth phone. The ipod was playing through the FM transmitter together with voice instructions. when I received a call, all was well with this directed through the GO's speaker (shame this cant route through fm transmitter!) but when the call ended, all sound was lost until I reset. It looks to me like these units are still bugged. after £400 I am hoping that if it is all firmware glitches, these will be corrected shortly. I would love to hear from anyone who has had similar issues with the x30 series. Thanks.

mikealder · Posted: Thu Sep 11, 2008 7:28 pm Post subject:

There seem to have been quite a number of reports recently of the GPS position being out by some distance, this could be due to the Quick GPS Fix data (if you use it).
Otherwise it could be down to a number of things, local GPS Jamming by the military, you mention the M3, were you close to Farnborough or the area the army use for "playing" with tanks?
Atmospherics, Sun Spot activity/ Solar flares etc but at least two or three others have reported problems in the last day or so - Mike

carl_the_cobbler · Frequent Visitor Joined: Jul 22, 2007 Posts: 251

Could it be the black holes in France?

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Warning ** I am joking ** Warning
Warning ** I am joking ** Warning

ChrisJones · Occasional Visitor Joined: Oct 04, 2003 Posts: 28

Hi Mike, thanks for your reply. I am pleased to hear I am not the only person with this issue. My trip was to Portsmouth from Windsor down the M3. The issue did not seem to be limited to any part of the journey. I noticed it kicked in just as I arrived in Windsor prior to a final roundabout. The issue still existed several hours after arrival as I set off to return home. Again, initially shown on this roundabout but continuing for the whole hour and a half journey back to the office. I switched it off in the end as the info was useless to me. Switching on for my journey home from the office, all was well so maybe you are correct with atmospherics but surely this would affect everyone at least everyone in the same approximate part of the country?

Trevor1234 · Posted: Thu Sep 11, 2008 8:48 pm Post subject:

Hi ChrisJones
I will be interesting to see if you have the same trouble when you next travel the same route.
_________________
Tomtom Go 720.
Navcore 9.510
Central and Western Europe v855.2884
GPS World Traffic cameras
Home 2.7
iPhone 3G

LesP2008 · Posted: Thu Sep 11, 2008 9:11 pm Post subject:

Today i was on the M25 and from jcn2 A2 until i got onto the M23 towards Gatwick the whole TomTom went haywire.
The cursor was in a field alongside the motorway the red planned route line was showing on country lanes alongside and the status bar kept telling me to turn every couple hundred yards even though there was of course no where to go.
I have never had this happen to my device before. When i got onto the M23 it sorted itself out and ran as it should, which was a relief as i honestly thought the 720 had gone bung.

mikealder · Posted: Thu Sep 11, 2008 9:14 pm Post subject:

Are you chaps all using the Quick GPS update via TomTom Home or not? - it would appear most reports of problems have been from a similar area though so it could be jamming. Although when testing jammers the MOD have previously announced it and the areas most probably affected - Mike

kichu1979 · Regular Visitor Joined: Jan 29, 2008 Posts: 99

Happened to me twice lately. Just reset the unit (through the bottom hole) and it should be fine. Probably has something to do with quickgps data.

LesP2008 · Posted: Thu Sep 11, 2008 10:24 pm Post subject:

Yes Mike i do use the quick fix data.
Tomorrow i will try it without the Gps fix and see if it behaves itself.

ChrisJones · Occasional Visitor Joined: Oct 04, 2003 Posts: 28

Hi all. Many thanks for all of your responses. Yes, I too have been using the GPSFix info. I didnt try to reset using the hole underneath, only switched on and off. I will try the hard reset if it happens again.

Andy_P · Posted: Thu Sep 11, 2008 11:41 pm Post subject:

When it was doing it to me, resets didn't make any immediate difference. It just went away by itself.

It's only happened once in the last few months though.

lamplight · Regular Visitor Joined: Sep 13, 2004 Posts: 130

Happened to me yesterday evening around 6.30 and again at similar time this evening in and around Leicester on my 520. My given postiion was 'out' by varying distances from around 20 or 30 yards to sometimes only a few yards...and sometimes a spinning route on screen. Switching unit on and off didn't cure it, nor did a reset. However it righted itself on each occasion after around 15 minutes or so. I'm not using GPSfix, so that wouldn't be the cause for me.

There were a host of similar reports several months ago of course (and I experienced them at that time in the same area). But given the distance between current reported incidents, it seems unlikely to be caused by just local jamming.

andy-c1 · Posted: Fri Sep 12, 2008 8:08 am Post subject:

yep that happened to me yesterday too ,it doesn't happen often though
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TomTom 5001

wibbly · Frequent Visitor Joined: Dec 20, 2003 Posts: 315

Not yet seen this on any of the other forums. Has it only affected TomTom's this time?

technik · Posted: Fri Sep 12, 2008 10:17 am Post subject:

I also had the off road GPS error last week, but it's been fine this week.

It's either a problem with TT hardware or quickfix data

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