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

Originally Posted by lolypop000

..GTM36 work perffect on nuvi 3490 and 3590 in DE and FR but when you come in Slovenia GTM36 stop working. So where is the problem now in FW or Traffic provider.xml

In my opinion seems to be no problem of FW, but tuning problem related to external factors, which can either be the radio transmitter, which can confirm whether or not going to the store and comparing with other gps with gtm 36, or can also be strange frequencies of local radio interferences. From what I understand the station tuning of your region should be the 98.90 mghz, but sometimes appear over 5 station, and worse, sometimes with different parameters, blurring the line correct. One of these screens appears with 9/e4/0/21 (33), parameters that impede tune with 9/e4/1/33. The question is how to solve it. Perhaps entering parameters to neutralize it in trafficproviders.xml, suddenly the path may be out there. In this case the problem is with the SID = 0 should be annulled, allowing the tune to the correct sid = 1, what contained in trafficproviders. Finally, the parameter of the incorrect SID can be stored in some memory of gps or GTM receiver, there would be a case of them clean. Had already suggested a thorough cleaning of nonvolatile memory, making a broad and general reset and try manual tuning, you did it? Discover which the region of these non volatile memories and replace them with other empty would be a possibility too ...
The 006B048201.bin and 006B090100.gcd are fw of two variations of models of GTM25 receivers..

What is weird, why have 3490 and 3590 different versions and would they work on 3790?

@tom1807, why they have differents firmware family. The 1xxx and 37xx "old" firmware's not require ecc parameter to Traffic function and work with GTM that require (GTM 26,36,60) and with that not require (GTM 25, 35). The new firmware of the 24x5, 25x5, 3400, 3500 require ecc and only work with gtm 26, 36 , 60 with original signature, that have ecc (post 31) an dont work with Jetmouse signature (ecc=0). Lolypop case's and others seem to be of another order of causes..

Originally Posted by angelozip

The 006B048201.bin and 006B090100.gcd are fw of two variations of models of [COLOR=#333333]GTM25 receivers..

It is different SW for different TMC Reciever:

006B048201.bin - GTM10/12&20/21 (old classic TMC for all FM radio 10/12 - 1 generation and 20/21 -2 generation)
006B090100.GCD - GTM25/35 (3 generation)
006B125700.GCD - GTM26/36 (4 generation)
006B139900.gcd - GTM60HD (HD traffic)

Originally Posted by Giomen

It is different SW for different TMC Reciever:

006B048201.bin - GTM10/12&20/21 (old classic TMC for all FM radio 10/12 - 1 generation and 20/21 -2 generation)
006B090100.GCD - GTM25/35 (3 generation)
006B125700.GCD - GTM26/36 (4 generation)
006B139900.gcd - GTM60HD (HD traffic)

Giomen, very useful your intervention, however i reiterate that the 006B048201.bin firmware is of the GTM25. As I said, there are two variants of GTM25 (see screenshots) with different firmwares, where a fw does not support the firmware of another. One has Product ID 482 and other Product ID 901. Considering how reliable your information, which seems to be, we can say that one of these GTM25 is Generation 2 and the other Generation 3. Are different, by source firmwares, as indicated by the garmin's website which has separate specifics files: FirmwareUpdateforGTMxxTrafficReceiverType3_290.gcd (ID 901) and FirmwareUpdateforGTMxxTrafficReceiver_550.rgn (ID 482 and ?). The 006B048201.bin firmware I used for GTM25 ID 482 (generation 2) and 006B090100.GCD fw for the GTM 25 ID 901 (generation 3).
If you check both firmware with a hex editor, you'll notice the correspondence to each specific model. For example, the 006B048201.bin have the same SYS Ver 550 of the GTM25 ID482 (see screenshots). The question of the generation is also confirmed by the hex editor, which indicates GTMxx G3 in the fw of GTM25 ID 901.
In short, the 006B048201.bin is firmware of the GTM 25 ID 482, as seen from the screenshots and analyze of the hex editor, and should be, according to his information,
also firmware of GTMs 10/12 (generation 1) and 20/21 (Generation 2), ie, a upgrade firmware that covers an entire family of TMC receivers, something to confirm..

P.S.: is also very likely that files like 006B048201.bin are generic files names and of distinctive content that are read by the operating system to update of different GTM receivers, in the same way that the gupdate.gcd serve as a vehicle for updating firmware for different GPS's models.

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