Carprog transponder signal to low

[golona88]

transponder signal to low
had such a case I tried czyba of 20 times and no result in different positions, the antenna 3.3om for volvo s40

[pianoman58]

What transponder is it is it 7931 7935 or T5

[gutman33]

id48 crypto

[bugajewski_pl]

Try immobilizer antenna from Opel immo2.

[golona88]

works great on the box of the old Opel
thanks ziomal

[thunderwinged]

Original antenna carprog work good

[radrad10]

Hi
While reading the transponder T25 carprog gets the message "transponder signal is low". I tried with the antenna from clone carprog (adapter A3) and immobilizer antenna from Opel immo2, what am I doing wrong?
266788266787

[lupu_sandu]

Use this mod for CP:

[radrad10]

Precisely for this I used, I did 6.6 nF in positions: 2,3,4.
266809

[igorr]

Precisely for this I used, I did 6.6 nF in positions: 2,3,4.
266809
disconect antena and press read transponder what message do you get,if you get transponder signal to low you must do more modification

[radrad10]

after disconnecting the antenna also get this message "transponder signal to low" what could be broken?

[lupu_sandu]

I don't see capacitor six from you CP removed.
Also, use one VW coil

[Shemek]

open up the carprog...do it without covers...I have this issue and for me works without coves...
did you plug in external +12v..???

[radrad10]

I don't see capacitor six from you CP removed.
Also, use one VW coil

Yes I removed capacitor six according to instructions, really should however be the capacitor six on PCB, if yes then on what value?



Shemek (http://www.digital-kaos.co.uk/forums/members/415749-shemek/) without covers antenna don't work, with external +12v and without external +12v also don't work.

[Shemek]

If you have done all repairs then you should check your antenna it should be between 5.8-6.5ohm
I have got few antennas and the best one is as above...
Other antennas below 5ohm wont work...I got always signal too low...
good luck..

[lupu_sandu]

For me worked only with VW coil (23-25ohm). Fiat,Alfa or Opel coil will not work on my CP

[Shemek]

my one works only with antenna with 5.8-6.8ohm...do you know why is like that...???

[radrad10]

My antenna clone carprog resistance is 3 ohm, immobilizer antenna from Opel immo2 resistance is 5,9 ohm with my carprog not work unfortunately.

[Shemek]

my one did not work too from opel immo2 5.9ohm..
I have added extra 5cm of cable from other antenna and end up with more then 6.2ohm and now is working...
also I have other antenna from clone cp and it was already 6.2ohm and was okay from first use...

[radrad10]

Shemek (http://www.digital-kaos.co.uk/forums/members/415749-shemek/) I soldered to the antenna Opel Immo2 5cm cable and now resistance is 6.2 ohm, but did not help. lupu_sandu (http://www.digital-kaos.co.uk/forums/members/61191-lupu_sandu/) from what VW group car with the antenna you are using (model car and year) ?

[radrad10]

Hi
I replaced on the PCB, HTRC110 01T to a new, via an antenna 23,5 ohm I read the transponder.
I do not know if correctly, I can not save the contents of the transponder to file.
The movie is in this link to download:
cp T25.avi - Przeklej.org (http://przeklej.org/file/MWtJAL/cp.T25.avi)

[Marek_Spy]

Hi
I do not know if I'm right but I think the most important is the impedance rather than resistance.

[boxsport]

For me worked only with VW coil (23-25ohm). Fiat,Alfa or Opel coil will not work on my CP

Hello there.
i know this thread is old but i hope you can help me out.
i have clone carprog and i need to prepare transponder for Volvo.
I tried to read transponder but i have error "transponder signal to low".
My carprog pcb seems to have the mods already done for the resistor and capacitors.
i already tried with Opel antena but still same error.
I also have this error with or without the antena connected.
i also tried with 12v connected, but same result.
what can i do to make this work?
I need to finish this transponder ASAP.
Do you think that with VW antena will fix my problem?
Is there anything else i can do?

is it possible to prepare transponder file for volvo with carprog and program transponder with FVDI 2018?
I can read transponder in FVDI and copy info to carprog, but in ID i cant copy value...
Could you give me tips on what can i do to sort this out?

Im sharing a picture of my carprog pcb
Thanks

[boxsport]

hello guys,
I was able to get the carprog to recognize the transponders by using the VW antena...
Its seems that i also have other issues with this carprog unit, because doing the test with the A9 adapter, i have "errors" and its marking some damage chips...
Will need to replace these, but it worked for me to prepare the transponders...
I just hope that they work...

Anyway, i want to Thank You All, because the comments you made here helped me to solve this issue that i had with the transponder...
Cheers.

[klaus87]

how did you succeed? that doesn't work for me:(thanks

[Jurgis]

I had a strange experience with this. Carprog out of the box didin't read anything - I always got "Transponder signal too low". Mine already had 15k resistor, so I decided to swap it with 120k and temporarily soldered 1/4W resistor. Everything was fine then - it managed to read my VAG key ten times out of ten with stock antenna. As soon as replaced temporary resistor with permanent one, everything went wrong again - "Transponder signal too low". I soldered back the same 1/4W 120k resistor once again, but still no luck, same error. Wtf?

[Jurgis]

Update: fixed it by replacing HTRC110 chip with genuine one.