Saturday, June 25, 2016

Carprog error: Antena not connected (SOLVED)


Nice!! Hi, all!! Happy to share this for you all, for I just succeeded to solve my Carprog with error Antena not connected.
Background:
Days ago, I bought Carprog at www.uobdii.com from China. I put antena into Carprog clone and choose toyota key, put trannsponder into antena and read ok but i chose transponder vag key show me “antena not connected”.
Ps. Here is the connection diagram, and I connected the device to the power via USB cable. All I did is according to the user manual.






Solutions!!
Yesterday I did a little research around transponder section of carprog hardware, because i always got the message – antenna not connected when i tried to read a key with transponder. I found the datasheet for HTRC110 – this is the ic that is responsible for communication with transponders through its antenna. The antenna is a simple coil, and it should form a serial lc circuit with the capacitors soldered on the PCB. The antenna’s inductance (i measured mine) is 283 µH. To form a serial resonant circuit at 125 khz we need a capacitor with approximately 6 nF (i put in my carprog a 7.4 nF because that was what i found). Now my China Carprog clone is reading the transponder (i have only one from my caddy).
Here are the mods i did:
1. replaced 150k with 15k (resistor)
2+3+4 here we need to solder a capacitor with aproximately 6-7 nF(put one or combine from 2-3 capacitors)
5. removed 100 nF capacitor
6. removed 100 pF capacitor
in position 2 it was a 2.8nF capacitor
in pos 3 it was 0.5 nF cap
in pos 4 it was 100 nF cap




Hope this helps you all.

11 comments:

  1. hi do you have a final image about your circuit?

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  2. pls if you can writeme citsis16@hotmail.com

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  3. Thanks for helping! It's really work.

    ReplyDelete
  4. Hi! I've tried your way to fix and yes is real. But still have problem . Carprog say transponder signal too low. If you know how to fix it ill be verry happy. Thanks

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  5. Carprog V8.21 Online Full+ Manual,
    http://diagnosticsoftwarekeygen.ga/

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  6. Hello. I have problem mit antena - antenna not conected . And with Immo Toyota eeprom 24c02

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  7. Hi.Hello. I have a problem with Carprog 8.21 - with "antenna not connected". When reading a VW transponder, he reads, when I want to read Toyota key transponder 4C or 4D, it pops up - antenna not connected. Where is the problem. The resistor is 15K and the capacitor is 6.8 nF

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  8. and with immo Toyota reads eeprom 24C02

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