Hi Wiscony,

There's a backup setting in the GPS called "dead reckoning" - which uses the rotation of your tire, then calculates your relative position in reference to your speed via the tread circumference. In the event your GPS module loses its signal or has issues interpreting your location, the dead reckoning intends to maintain your position until it is able to make another satellite reference. If this issue becomes persistent, my first suggestion would be to consult with your dealership. Your tire tread is going to change over time, which is inevitable, but this shouldn't be consistently affecting your navigation accuracy.

In regards to your ambient light concern, this is a behavior that our techs are currently monitoring. Ford service advisers are instructed to investigate the occurrence and diagnose the Accessory Protocol Interface Module (APIM) accordingly.

Hi windzurfer,

This issue has been observed when over-sized tires are involved. However, the dealership should have means of re-calibrating your sensors to adjust for the difference. One thing I want to note is that your dealer is limited by the number of presets they are able to make the adjustments for. In any case, I want to see what other sort of options I can make available. Please PM your full name, VIN, mileage, and servicing dealership.

Hello SofaKing,

I recommend consulting with your dealership regarding this behavior - stock tires should definitely not be causing any navigation hiccups.

Although some have reported success with pulling the negative battery cable, I want you to be cautious if this is an approach you decide to take. Your warranty may not apply if anything goes wrong or gets damaged during the attempt.

Antonio

 

Thanks for the response Antonio. Sitting in my truck here I do notice I have a circle blinking around my arrow. Thinking back to my phone gps, means I don't have accurate signal. Which then according to you defaults to the dead reckoning.

A. I wonder if the GPS module is going or the satellites are falling from the sky!

B. I'm surprised the dead reckoning is that far off.

 

Wiscony,

I would definitely bring it up with your service adviser during your next visit. They should be able to examine your ambient lighting concern as well.

Antonio

 

Thank you for the response Antonio. My GPS also has the blinking circle around the arrow and has since I purchased the truck. Is this a sign of a poor signal as Wiscony mentioned or does this not apply to our factory GPS units?

 

So Antonio, you are telling us that if we replace our battery, we void our warranties?????? I really appreciate your help here, bu that sounds like flawed advice.

 

I have the ring too when it is off track. I'll PM my stuff to Antonio later today. Thanks.

 

Quote "Hello SofaKing,

I recommend consulting with your dealership regarding this behavior - stock tires should definitely not be causing any navigation hiccups.

Although some have reported success with pulling the negative battery cable, I want you to be cautious if this is an approach you decide to take. Your warranty may not apply if anything goes wrong or gets damaged during the attempt.

Antonio __________________
FORD IN-VEHICLE TECHNOLOGY TEAM"

Considering no dealership has been able to fix the problem that numerous people are having with this, what else would you like us to do? My factory GPS on my $50,000 3 month old vehicle was basically useless because it was constantly recalculating and giving me directions from roads I was not on! My 10 year old TomTom was far better than this.

The circle has always been on mine. There is nothing that I have found that describes what it is and no one on here has of yet has said either. Anthony?

To be told by any Ford representative that you might void your warranty by disconnecting your battery is irresponsible at best. Sounds more like an attorney than a tech. How about Ford comes up with a fix for their system so we don't have to do things like this.

 

SofaKing,

I actually had to check with the nav team on this one. The blinking circle is present on the nav for North American, South American, and Chinese markets; the circle is solid and unblinking for nav-equipped vehicles sold in Europe however. I was advised that the circle has nothing to do with GPS location, it's a benign animation as part of the interface.

Hi CptCook,

I appreciate your candor and I will elaborate. Removing your battery cables do not necessarily void the vehicle warranty, no. Warranty-related inquires are beyond my scope anyway, but my intention was more to incite caution when attempting to apply a DIY solution. Mistakes happen all the time, but are unfortunately unwarrantable. Under normal circumstances, I would sooner recommend the vehicle be serviced at a dealership.

windzurfer,

Please see my reply to SofaKing above, in regards to the blinking circle. I'll keep an eye out for your message.

Antonio

 

The problem with the Navigation is an easy fix...simply disconnect your battery for a few minutes and then reconnect it.

I purchased my truck and drove it home (200 miles) with absolutely no problems with the GPS. I drove straight to Discount Tire and had them mount my rims and tires (1" taller tire). My GPS was instantly off. I tried several different trips, ALL IN PLAIN VIEW OF THE SKY and the GPS was off after a few miles.

I read on here how you can disconnect the battery and it will fix it. So that it was I did. Sure enough, it has been dead on ever since. If you have ANY GPS problems, try this first. Mine has been fine for just over 3000 miles.

 

I'm giving the neg cable pull another shot right now. maybe I didn't leave it disconnected long enough the first two times I tried it. What's the magic time? an hour, 12 or a whole 24? I left it disconnected for an hour each time I did it previously and it always resumes it's flakiness.

[MENTION=80868]5111[/MENTION]: just an FYI, I went from the stock 275/55r20's to 35x12.5r20's so I'm going 3 inches (or 1.5" on the radius). So they can only get close to 35 since the biggest option appears to be a 315/70r17 which is only 34.5. Ford should issue an update to include more tire sizes.


Mine always starts out on the spot for the first mile, but I have a lot of turns get out of the neighborhood and once I go straight for about 5 miles, then make a turn, the navigation is about 1/4 mile behind (which makes sense since the truck thinks it's going less distance due to bigger tires and no calibration) and takes the turn into the rice fields and will at that point continually be off until I stop and let the module get a true mark. I'll report back if this lasts longer on this disconnect cycle. later in the weekend.