[CvilleDiesel]

I have 5300 miles on my GC Ltd Diesel.
All around, happy with car, but it has had numerous issues that confound and anger me. Top of the list is Nav. When I picked up the GC, Nav was great. A few weeks later, it put me in the middle of nowhere. It was off by a solid 60 miles for a good month.
If you went into the Where Am I setting, you can see what satellites are being used, and the answer was, none. Didn't know where I was at all. My average drive is about 20 minutes, and even when I would be on an Interstate for 2 hours, the Nav did not locate any satellites.
Then, one morning, it started working again. Worked for about 3 weeks. Then, today, nothing again.

Why not take it to the dealer? Because it is a royal PIA to go without a car when you are in sales. And frankly, the Nav doesn't stop me from being able to use the car. I want the dealer to look at this via wireless. No reason in the world why manufacturers aren't setting cars up for long-distance diagnosis other than them wanting us in the dealership.

This is not acceptable. Pretty much just want my $500 back for the Nav. No faith in the UConnect system.

 

[MDBones]

I haven't had any problems with the Nav in mine. Has so far been spot on as far as accuracy goes.

 

[Willx]

Sounds like an antenna system problem more likely at the Shark Fin.

This can not be diagnosed by the wireless system and must be looked at by the dealer.

Once the NAV is working it is great, voice activate routing works well and you can update the radio system software by USB.

 

[rfeng]

Are all the antennas combined in the shark fin for the NAV, Radio, Sirius?

Not had any problems with NAV but with Sat radio is the poorest performer on Sirius I have experienced.
I have other "Fords & external" sat receivers that have never faded out but the one in the this Jeep GC does a few times each day for a min or two. There are 2 Sirius sat systems the legacy XM (geosync 22,000 mi over the equator & legacy Sirius 3 sats in high eliptical over North America) The legacy Sirius system from my experience always worked better when driving in valleys traveling east - west due to the high sat angle. The XM bird though higher power was lower on the horizon and never worked well for me.

Does anyone know what sats this radio uses the old XM or Sirius or Both? I know they offer the same program channels on both legacy systems just wonder what actual sats this unit uses (XM or Sirius).

 

[MDBones]

I believe the Nav and SiriusXM both use the same antenna. The 2014 uses the Sirius package, not XM. They just combined the names.

I've had issues with Sirius dropping out in places I've never had a problem with in my other vehicle. I think a lot of this has to do with the change to the shark fin antenna. There is a TSB and a fix for it. Had mine in for it and I haven't had a problem with that weird dropout since.

Could that be causing problems with the Nav? I suppose that's possible if they're both sharing the same antenna.

 

[Willx]

It is a Hybrid antenna and the harness carries FM/Sirius/NAV.

I can grab either a photo or a wiring diagram of what it looks like.

 

[Willx]

Try turning off the wifi on the radio and see if this improves the satellite reception. If this is the case there is an updated Antenna that should be out in the fall to address the issues and or there is a separate case to check that the Radio side connection is not damaged at the plug for the Sirius Radio. I have included a diagram of the back of the radio #2 are all connections going to the antenna. I do not have a good diagram of the shark fin antenna but there are the three RF connections plus the Power connection at the Antenna.