uConnect 15.26.1 is buggy; I want to downgrade. - Page 6 - Jeep Garage - Jeep Forum

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  #61  
Old 08-06-2015, 04:48 PM
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Re: uConnect 15.26.1 is buggy; I want to downgrade.

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Originally Posted by jacko15 View Post
NHTSA (https://vinrcl.safercar.gov/vin/) also doesn't know I did the update. Lots of folks who should know, don't.
most frustrating is it seems it could be really quickly done in an automated fashion. Seems that Uconnect is scanning our vehicles and blacklisting server access if you dont have the latest software update (symptoms are the app wont work and the website complains of wrong PIN). So they likely know in almost real time what vin has what software.

Yet they don't give you a notification in the app (I suppose that's yet another group- or probably 2 one for google and one for apple) or on the website of why this is happening. And as, above if you chat with the people via the website they'll actually argue with you not to bother them they aren't uconnect.

The app people (at least on android) will stop you in your tracks and flash a giant notification to update the app- but they wont do the same for the uconnect firmware even though their app is useless without out (at least for remote- not sure on pandora et al)


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  #62  
Old 08-06-2015, 09:44 PM
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Re: uConnect 15.26.1 is buggy; I want to downgrade.

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Originally Posted by Rocketrancher View Post
- Update for AirGapping the Rat -

I built-up a terminator but won't have a chance to try it for a few more days yet.
I did order some test adapters in the meantime so I can better measure in that awkward place behind the radio.
Crossing my fingers that they'll arrive and I can resume over the weekend.
Great! Hope it works!
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  #63  
Old 08-07-2015, 10:38 PM
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Re: uConnect 15.26.1 is buggy; I want to downgrade.

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Originally Posted by CaptWill View Post
Just posted a photo of the connector, in my previous post.

I do have the GPS Nav on my 8.4, and it has always worked fine. Not sure if there is some other GPS Nav option, that would be subscription, as I have never heard of it. Why does my factory Nav system work, if that is the GPS antenna? Just asking...
I was pondering this and have some ideas, but nothing I can back-up with documents. According to the Fakra guides, a blue connector is for GPS/telematics. Ours is a '14 Limited, too, and I'm looking forward to getting back inside my stack to see if I also have one of those tucked-away.

Two thoughts I have:
- IIRC, our '11 WK2 had a GPS patch antenna under the dash and I'm not certain if it served the MyGig radio or a telematics module that was stuffed into the right kick panel. Maybe this is a holdover and they still build the cars with it.
- When we got our '14 (after the front-end of our '11 was taken off by a red-light-runner), I remember a salesman saying they were upgrading 8.4a radios in cars as a promotion to help them sell alongside those with optional 8.4an's. I wonder if the 8.4a radio had a lightweight GPS antenna to serve the telematics that was then retired when the Nav was enabled, and they switched to the shark fin. (not having a blue mate available kinda eliminates this though).

This is a nice puzzle; maybe someone has another piece.

Speaking of pieces, I thought I'd add links to some Fakra connector charts. Looks like they're here to stay, and I'm starting to find them intriguing, with their strict color codes (like our PanTone colors) and tasty names

http://rfsupplier.com/images/Fakra/F...ries_color.jpg

http://www.whnet.com/4x4/radio/FAKRA.jpg
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  #64  
Old 08-08-2015, 08:54 AM
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Re: uConnect 15.26.1 is buggy; I want to downgrade.

The blue connector I found laying loose behind the center stack, looks just like the one listed in the Fakra connector ID sheet, so I think you are correct about it being for a GPS/telematics module of a different build.

The YELLOW "K" connector is SDARS Satellite, which I have and is connected, would be my GPS antenna. I also have a white one nect to it, and a larger gray one which must be the power.
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  #65  
Old 08-08-2015, 10:23 AM
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If the unit happens to have an external WiFi antenna for the overpriced uConnect hotspot feature I'd prefer to disconnect that as well.

Far less of a risk than the datalink, but it represents a pointless attack surface once the datalink is disabled.
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  #66  
Old 08-08-2015, 08:31 PM
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Re: uConnect 15.26.1 is buggy; I want to downgrade.

They updated my UConnect on 8/3/15 automatically when I brought the jeep in for service on the tranny. 'My Favorites' no longet come up on the tap in the top left when using Sirius. Songs/Artists still 'starred' though. Pretty frustrating - going to call up the dealership on Monday and see if this is common?

Yeah, it's a first world kinda problem - but it worked great until the dealership took the liberty to update the software
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  #67  
Old 08-08-2015, 11:10 PM
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Re: uConnect 15.26.1 is buggy; I want to downgrade.

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Originally Posted by CrimsonKing View Post
They updated my UConnect on 8/3/15 automatically when I brought the jeep in for service on the tranny. 'My Favorites' no longet come up on the tap in the top left when using Sirius. Songs/Artists still 'starred' though. Pretty frustrating - going to call up the dealership on Monday and see if this is common?
The recall update was done when I had the oil changed. So far nothing wrong, everything is working as it was before the service
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  #68  
Old 08-08-2015, 11:20 PM
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Re: uConnect 15.26.1 is buggy; I want to downgrade.

http://www.oemautopartsco.com/produc...override-cable

I think this is the termination cable we're looking for! That's one expensive resistor
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  #69  
Old 08-09-2015, 01:26 AM
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Re: uConnect 15.26.1 is buggy; I want to downgrade.

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Originally Posted by jeepgrandcherokeesal View Post
911 Vehicle Phone Override Cable

I think this is the termination cable we're looking for! That's one expensive resistor
Ain't that neat? Nice find!
And, yeow, what a price tag.

Suspiciously familiar profile under the tubing.
We have ways..........and the test adapters came today!!
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  #70  
Old 08-09-2015, 02:06 PM
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Re: uConnect 15.26.1 is buggy; I want to downgrade.

Quote:
Originally Posted by Rocketrancher View Post
Ain't that neat? Nice find!
And, yeow, what a price tag.

Suspiciously familiar profile under the tubing.
We have ways.
.........and the test adapters came today!!

...and when closing that webpage, I got a popup saying "Don't leave. Order now and get $10 OFF and free shipping".
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  #71  
Old 08-09-2015, 02:13 PM
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Re: uConnect 15.26.1 is buggy; I want to downgrade.

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Originally Posted by CaptWill View Post
...and when closing that webpage, I got a popup saying "Don't leave. Order now and get $10 OFF and free shipping".
Yessir! I tried entering that code at checkout and got a message "Your cart does not meet the requirements for the GIVEME10 discount code"
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  #72  
Old 08-10-2015, 04:05 AM
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Re: uConnect 15.26.1 is buggy; I want to downgrade.

Well, it was a pretty long, hot afternoon. I pulled into the backyard under a mighty oak, set a fan, grabbed a buncha instruments, and got after it. I am really thankful that @jeepgrandcherokeesal asked for additional measurements on the CDMA antenna, because the 50-ohm termination Did Not Work. Really stunned, because I was expecting a nominal comm. antenna feed. But armed with that extra info, I was able to fend-off the nag screen as well as keep the radio from registering with Sprint ~99% of the time.

I have pictures to sort and post, so it will take a bit for me to organize, but here's the short answer: Terminate with 10k, and cage it.

First thing I found was the radio is putting 2.5vdc (center positive) on its antenna connector. I attached the 50-ohm load and was crushed to quickly get the nag screen and watch the radio register with the carrier. I was able to record some RF sweeps and got predictable activity to use later. Also observed the load for temperature change, just in case there might be an antenna current issue. I think not, although the load temp did rise about 4 degrees above ambient but stayed well below what the rest of the radio was dissipating thru the case.

So I turned to the antenna and measured:
(with TDR) Termination is 17 feet away, and higher impedance than the 50-ohm cables.
(with LCR bridge) L: 55mH C: 670pF R: 10k <--- .Oh, Really?

Sooooo, it was back to the bench, replace the 50-ohm load with 10k, and the next trial went much better. There was no nag screen, but the radio still registered. The RF measurements were way lower but the load was radiating.

Sooooo, it was back to the bench, solder a piece of tubing over the load,
and the results were ideal: No nag; No registration; No RF activity

I left it all running for an hour with no change, and then closed it up.

I drove around later and did notice the radio indicate service for a period when I was within the shadow of a known Sprint tower, but I'm also thinking I need to close the end of the shield over the load - the tubing is open-ended. Just maybe?

I'll gather up the rest of the show and put it up soon, but I think we're very, very close.

This is the current state of the device:



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