Thread: GTM36 and GTM26 problem with TMC on nuvi series 2xxx and 3xxx

Originally Posted by lolypop000

Problem with TMC is with original Garmin subscription and also with jetmous subscription.
I try this on nuvi 1490 with original subscription and then ad jetmous subscription.On 1490 work only GTM 25 and 35,but 26 and 36 wont work.
This is from nuvi 1300 with GTM25 where TMC work (subscription is from jetmous)

Ok Loly, I also had problems with GTMxx receptors, but were localized problems, some of software (reinstalled fw) other hardware, however this happens with everything that is produced in series. The question is whether these problems are widespread and, mainly, the cause of the problem. For example, for all devices I have tested and all references in the forums of my country, I can safely say that the signatures of JetMouse in GTMs 26, 36 and 60 when coupled with the new operating system of Garmin (24x5, 25x5, 3400 , 3500) do not work and that the GTM 25 and 35 work with these gps (in my country, vital details). I ask you or other friends: the JetMouse signature in GTM 26, 36, 60 with 24x5, 25x5, 3400, 3500 are operating in their countries? If yes, please, post a screenshot of “GTM Info” and “FM Traffic Status”. With them we can assess whether the tuning parameters transmitted by FM-RDS-TMC are 3 or 4 and so we can justify or not the issue of the importance of ecc.
Loly, when you say "I try this on nuvi 1490 with original subscription ad and then jetmous subscription. On 1490 work only GTM 25 and 35, but 26 and 36 wont work".. well, when adding a JetMouse signature being in the same place of the original signature, Jetmouse overwrites on it, by having the same or similar parameter, try it if you want to risk ... The problem may have been around. It would be ideal if you publish the screens this case..
In my country the 1300 and 1400 work perfectly with GTM25/35 receivers and also with 26 and 36 with JetMouse signature. The Garmin Traffic here was launched just over a year and officially only available in GPS with GTM26, but now also with GTM36. In the United States and South America all the new models of gps Garmin are coming with GTM26, 36 or 60, nor the refurbisheds comes with GTM 25 or 35. Surely these last should be overstock from Garmin or remain in these markets for some compatibility issue with the millions of existing old models of Garmin GPS. The entire range of FM-receiver RDS-TMC Garmin's work in the United States (GTM 10, 11, 20, 21, 25, 26, 35, 36, 60) but in my country, only GTM 25 and above works. Interesting, no? Surely it has to do with the tuning parameters transmitted by radios with TMC and necessary assimilation of GPS and receiver gtm firmware’s, and the concern of Garmin to avoid piracy signatures in new markets, something more difficult on vulnerable system of the older markets, as United States.
The problem we face, I repeat, is whether and why the signatures of Jetmouse, universally, work or no in new Firmware and GTMs (24x5, 3400 with GTM 26, 36..). I am very curious to know if it works in other countries...

The GTM25 came with a lifetime Clear Channel traffic (EX: TMC Infoblu) subscription and the GTM35 came with a lifetime ad supported Navteq traffic subscription.

That is why you get two different sets of traffic.

@roger1109, in all GTM25 I've ever seen, and there were many, coming mostly from the United States, the signing was Navteq. The differences between the GTM25/35/26 and 36 are logical and physical. The logical most likely has more to do with new security features (to prevent piracy of signature). Overall, my tests did not show any difference in performance, but are physically different, internally and externally, already dismantled some .. I have some screens of gtm26 and 25 dismounted...

Originally Posted by lolypop000

..Today GTM36 stop working on my nuvi 3490 i add supscription with jetmous and still no data recived but when i connect GTM25 i have on screen message (updating TMC reciver) and then i have working tmc all work,but when i connect back GTM36 no data available.

Loly, the best way to evaluate the problem is analyzing the screens of "GTM Status" and "GTM FM Table". You know very well how to enable the screenshot, but for those who do not know, just go to Settings, Display and select Screnshot, then just activate the camera. The screenshots are in the folder Screenshot gps ..

The intention is to understand why your 3490 with GTM36 not work. Moreover, would be great to know of some 34xx, 24x5, 25x5, 35xx with GTM36 or 26 (JetMouse signature) that works, in both would be important to observe the screenshots of the "GTM Status" and "GTM FM Table".
The GTM 36 and 26 with signature JetMouse work with all Nuvis 1xxx series in my country. The nuvis xxx don't work with gtm25/35/26/36 here (japanese fw for 1360 works only with gtm25 here).
In all cases that I observed, personally and with users forums of here, Jetmouse signature not worked in 24x5, 25x5, 3400 and 3500 with GTM 26 and 36, independent of alterations in region 140. A possible cause may be the hypothesis raised in my previous posts (the need of ecc in signature and TMC radio that transmits 4 parameters, including ecc) . I not only tested the relation of the change in region 140 of the new firmwares with the functioning of Traffic official signature in GTM36 and 26 of nuvi 3490. Apropos, the Traffic signature in your GTM36 in 3490 (pure or 3790?) was the official or of the Jetmouse?