Car in Wrong Location on my PCM Nav
#1
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Not that I really use this system for the purposes of navigation, I do however open the map to watch the traffic. The other day when I did this, the display location was not consistent with where I was located.
I did turn off the car and restart.
I did enter a route.
I did search and found older posts that mentioned to disconnect the battery which I did not do since I was not sure about it.
Perhaps I should take it to the dealer?
Still shows some wrong location.
Doesn't seem to move either when I drive.
Has anyone else had this issue and or know the solution?
Thanks for your help.
I did turn off the car and restart.
I did enter a route.
I did search and found older posts that mentioned to disconnect the battery which I did not do since I was not sure about it.
Perhaps I should take it to the dealer?
Still shows some wrong location.
Doesn't seem to move either when I drive.
Has anyone else had this issue and or know the solution?
Thanks for your help.
#2
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On 997 models, this was typically caused by work that caused the GPS antenna to be disconnected followed by someone forgetting to reconnect it. Its reception is just poor. On 997s the GPS antenna is in one the passenger side on the trim near the wipers under the windshield and often would get disconnected when the windshield was replaced. I don't know where it is on 991 models.
The point is, it is likely the GPS antenna isn't working well and gets a large degree of error. Has there been any work done on the car that might explain a disconnected antenna? It might be as simple as plugging it back in.
The point is, it is likely the GPS antenna isn't working well and gets a large degree of error. Has there been any work done on the car that might explain a disconnected antenna? It might be as simple as plugging it back in.
#3
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The only work was installing a wire for the radar which the dealer performed about 2 weeks ago. It was from the fuse box to the rear view mirror so I could plug in my radar detector.
Not sure if I used the Nav in the interim.
Most of the posts I read were in the 997 forum.
Don't know where my antenna is for the Nav?
Is it the same for the satellite radio? Because that works fine.
Thanks for your help.
Not sure if I used the Nav in the interim.
Most of the posts I read were in the 997 forum.
Don't know where my antenna is for the Nav?
Is it the same for the satellite radio? Because that works fine.
Thanks for your help.
#4
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It appears from the diagram linked here that the GPS antenna (part 10) is separate from the satellite radio antenna (part 1) and is likely located in a different position in the car, although with this diagram it isn't clear where. See: http://www.gaudinporscheparts.com/au...and-radio-scat
You can't help but wonder if it related to your detector work somehow, but maybe not. In either case, hopefully your car is still under warranty and the dealer will work out the problem at no cost to you. I'd give it a 95% chance of simply being a problem related to the antenna.
You can't help but wonder if it related to your detector work somehow, but maybe not. In either case, hopefully your car is still under warranty and the dealer will work out the problem at no cost to you. I'd give it a 95% chance of simply being a problem related to the antenna.
#6
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Thanks for the input. You may be correct, as they mentioned the wire would've running along the pillar, which I see in the diagram.
So far the dealer has mentioned it is likely due to the weak signals??? But I will bring it to their attention about the possibility related to the radar wire install.
Thanks. I'll keep you updated.
So far the dealer has mentioned it is likely due to the weak signals??? But I will bring it to their attention about the possibility related to the radar wire install.
Thanks. I'll keep you updated.
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#9
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Originally Posted by mrhebert
Same thing happened to my 997. It is related to the antennae being disconnected. Very easy fix.
Originally Posted by RickIrons
This happened with my 991.1 a lot. The dealer was unable to fix it... It also happened a few times with my '13 Cayenne.
My update:
1) Dealer originally states it was satellite signals
2) Now they mention it is something in the PCM settings???
3) They firmly state it is not related to the installation of the radar wire.
They are going to investigate and get back to me.
Thanks everyone for your help. Much appreciated.
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Do we have a calibration process? I know on my old Garmin did. Go into calibration mode and then drive in a slow 360 degree circle, or something like that.
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Originally Posted by R_Rated
GPS tracking device will also do this![Wink](https://rennlist.com/forums/images/smilies/wink.gif)
![Wink](https://rennlist.com/forums/images/smilies/wink.gif)
#14
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Originally Posted by LexVan
Do we have a calibration process? I know on my old Garmin did. Go into calibration mode and then drive in a slow 360 degree circle, or something like that.
Do you know how to enter the mode for recalibration?
#15
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OP. The only reason a GPS produces poor readings is when it isn't receiving signals from enough satellites, typically due to interference from tall structures, too many trees, shielding from a human body (aka a bag of water), being indoors, or... a poorly performing antenna. I am certain this is the problem in your case unless you live in the midst of skyscrapers.
The only reasonable argument for accuracy in your car is if you live in the land of skyscrapers. Downtown LA is a known problem spot for example.
(I've worked on tracking apps for the military and transit systems and am familiar with a lot of the gotchas here.)
Last edited by StormRune; 08-27-2016 at 08:31 AM. Reason: Remove incorrect info on latitude and satellite locations! Doh