Caution: Be aware that upgrading your 8.4n garmin firmware
Sat Aug 10, 2013 5:16 pm
Last night, I tried to upgrade my 2011 Garmin unit with the 4.14 firmware update, which resulted in a bricked navigation screen.
There are two updates floating around, one for the CTP13 (2013) units (v3.15 I believe) and one for the CTP2012 (2011-2012) units (v4.14).
I used the CTP2012 (v4.14) file, and my unit is stuck on the Garmin splashscreen with "Loader Loading..." text on the top. It will not boot any further.
I've tried a couple of things to try to reflash it, including re-flashing the entire Uconnect system with the 2011 update and for the heck of it even tried the CTP13 upgrade.
Nothing worked, so I've put in a request to Garmin to see if they can help me get the "correct" update file, but I'm not holding my breath since it's a OEM unit and I don't think they like people messing with them in the first place...
Luckily, this is my "spare" experimental radio, so if I can't get it working again it's not a huge problem.
In short, I would suggest that if you have no compelling reason to upgrade your Garmin firmware, you shouldn't do it. There are too many different builds out there to be completely sure that your update is 100% compatible. I think that it's safe to say that there are dozens of unique builds for each model depending on which week it was made.
This does NOT mean that there is any trouble updating your maps, this warning is only for using the "GUPDATE.GCD" file to update your firmware.
There are two updates floating around, one for the CTP13 (2013) units (v3.15 I believe) and one for the CTP2012 (2011-2012) units (v4.14).
I used the CTP2012 (v4.14) file, and my unit is stuck on the Garmin splashscreen with "Loader Loading..." text on the top. It will not boot any further.
I've tried a couple of things to try to reflash it, including re-flashing the entire Uconnect system with the 2011 update and for the heck of it even tried the CTP13 upgrade.
Nothing worked, so I've put in a request to Garmin to see if they can help me get the "correct" update file, but I'm not holding my breath since it's a OEM unit and I don't think they like people messing with them in the first place...
Luckily, this is my "spare" experimental radio, so if I can't get it working again it's not a huge problem.
In short, I would suggest that if you have no compelling reason to upgrade your Garmin firmware, you shouldn't do it. There are too many different builds out there to be completely sure that your update is 100% compatible. I think that it's safe to say that there are dozens of unique builds for each model depending on which week it was made.
This does NOT mean that there is any trouble updating your maps, this warning is only for using the "GUPDATE.GCD" file to update your firmware.
Fri Sep 06, 2013 12:54 am
Tambam so you bricked your CTP2012 using CTP2012 v4.14 firmware?
I guess I should consider myself lucky, since I updated my wife's CTP2012 with that same firmware a few months back.
I guess I should consider myself lucky, since I updated my wife's CTP2012 with that same firmware a few months back.
Re: Caution: Be aware that upgrading your 8.4n garmin firmw
Sat Jun 09, 2018 9:34 am
Dear all,
I've got a 2011 Lancia Thema, wich is mainly a Chrysler 300c, italian styled.
My navigation system is CPT12. Yesterday I tried to install CPT13 firmware and, as result, I've bricked my unit. It remains loading. Does anybody know how to solve it?
Does anybody keeps a copy of CPT12 firmware? Maybe I could reflash the unit and recover it.
Thanks a lot!
I've got a 2011 Lancia Thema, wich is mainly a Chrysler 300c, italian styled.
My navigation system is CPT12. Yesterday I tried to install CPT13 firmware and, as result, I've bricked my unit. It remains loading. Does anybody know how to solve it?
Does anybody keeps a copy of CPT12 firmware? Maybe I could reflash the unit and recover it.
Thanks a lot!
Re: Caution: Be aware that upgrading your 8.4n garmin firmw
Sun Dec 20, 2020 12:32 pm
Does anyone has the firmware ctp2012?
Re: Caution: Be aware that upgrading your 8.4n garmin firmw
Wed Sep 14, 2022 9:24 am
Re: Re: City Navigator Europe NTU 2026.20 FID 12956
Mon Sep 22, 2025 6:12 pm
Hello guys. 
At the moment, i have a 2011 Thema with CTP 12 Uconnect also, with 2025.10 NT. I am wondering to upgrade to 2026.20 NTU, but I have one question, maybe you can solve the mistery, and know if the upgrading to the newer map can solve my problem.
So, is there anyone, who know what could be the problem ? After update, turn-by-turn directions disappear from cluster.. it used to show arrows, roundabouts, etc, but now, it is just showing only street names, but not any pictograms. like this : [Please Register or Login to download file]
I could not figure out what could be the problem. JCV works well, navigation works well, everything is ok, but the turn-by-turn insturctions in the cluster
Zakres , your turn by turn works well after update?
At the moment, i have a 2011 Thema with CTP 12 Uconnect also, with 2025.10 NT. I am wondering to upgrade to 2026.20 NTU, but I have one question, maybe you can solve the mistery, and know if the upgrading to the newer map can solve my problem. So, is there anyone, who know what could be the problem ? After update, turn-by-turn directions disappear from cluster.. it used to show arrows, roundabouts, etc, but now, it is just showing only street names, but not any pictograms. like this : [Please Register or Login to download file]
I could not figure out what could be the problem. JCV works well, navigation works well, everything is ok, but the turn-by-turn insturctions in the cluster
Zakres , your turn by turn works well after update?