Navigation question
Thread Starter
Pro
Joined: May 2012
Posts: 547
Likes: 9
From: Westminster Md
Navigation question
My navigation seems to be working, but on the top left side of the navigation screen it has a line crossing through the GPS symbol.
The owners manual says that means i am not receiving the satellite signal when it has the line through it, but I must be receiving the signals because its working. Has anyone else had this problem?
Thanks,
Nelson007
The owners manual says that means i am not receiving the satellite signal when it has the line through it, but I must be receiving the signals because its working. Has anyone else had this problem?
Thanks,
Nelson007
Le Mans Master
Joined: Feb 2007
Posts: 8,514
Likes: 235
From: Currently somewhere in IL,IN,KY,TN,MO,AR,MS,AL, or FL
Yes, you are not recieving any GPS signals. The nav system uses inertial guidance when GPS is not available. It will appear to work but will eventually drift if you don't reestablish the GPS signal. The GPS antenna is in the rear bumper area connected to a VCIM (Vehicle Communications Interface Module) also mounted in the rear. Window tinting will sometimes block the signal. The recommended repair procedure for no GPS signal is to remove the antenna and cable from the car placing them outside. Does it work? If so the issue is window tint. If not replace the antenna. Does it work? If not replace the radio.
BTW, the GPS symbol is upper right, not top left.
BTW, the GPS symbol is upper right, not top left.
Last edited by FortMorganAl; Aug 19, 2014 at 05:22 PM.
Thread Starter
Pro
Joined: May 2012
Posts: 547
Likes: 9
From: Westminster Md
Thanks for the info, i will try to check it out tomorrow.
Nelson
Nelson
Yes, you are not recieving any GPS signals. The nav system uses inertial guidance when GPS is not available. It will appear to work but will eventually drift if you don't reestablish the GPS signal. The GPS antenna is in the rear bumper area connected to a VCIM (Vehicle Communications Interface Module) also mounted in the rear. Window tinting will sometimes block the signal. The recommended repair procedure for no GPS signal is to remove the antenna and cable from the car placing them outside. Does it work? If so the issue is window tint. If not replace the antenna. Does it work? If not replace the radio.
BTW, the GPS symbol is upper right, not top left.
BTW, the GPS symbol is upper right, not top left.
Burning Brakes
Joined: Sep 2013
Posts: 760
Likes: 6
From: Georgetown Texas
Yes, you are not recieving any GPS signals. The nav system uses inertial guidance when GPS is not available. It will appear to work but will eventually drift if you don't reestablish the GPS signal. The GPS antenna is in the rear bumper area connected to a VCIM (Vehicle Communications Interface Module) also mounted in the rear. Window tinting will sometimes block the signal. The recommended repair procedure for no GPS signal is to remove the antenna and cable from the car placing them outside. Does it work? If so the issue is window tint. If not replace the antenna. Does it work? If not replace the radio.
BTW, the GPS symbol is upper right, not top left.
BTW, the GPS symbol is upper right, not top left.
Last edited by GL10DR; Aug 20, 2014 at 03:17 AM.
Le Mans Master
Joined: Feb 2007
Posts: 8,514
Likes: 235
From: Currently somewhere in IL,IN,KY,TN,MO,AR,MS,AL, or FL
The rear hatch glass covers almost half the sky if you are trying to look up from inside the cover on the back bumper. There are 24 operational satellites in low earth orbit at any given time. 4 are needed to get a position. 12 will be below the horizon. Typically 4 will be too low to get a good signal. Block 2 more with buildings, trees, and the metal in the car and you are down to 6 left. Now block half of those with metalic window tint and you have 3 good signals but you need 4.
Le Mans Master
Joined: Mar 2013
Posts: 7,393
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From: Ahead of You :)
St. Jude Donor '14
http://en.wikipedia.org/wiki/Dead_reckoning
There's your answer. It goes off last known signal plus other variables.
In same link to be more specific it's this section...
http://en.wikipedia.org/wiki/Dead_re...ive_navigation
There's your answer. It goes off last known signal plus other variables.
In same link to be more specific it's this section...
http://en.wikipedia.org/wiki/Dead_re...ive_navigation
