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Thread: Td5 discovery 2 FOB key not detected help please

  1. 20th August 2021, 08:15 PM #1
    1madgerman
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    Td5 discovery 2 FOB key not detected help please

    Hi all, need some help fixing my keyless entry.
    The car is a 2003 Discovery 2a.

    The car is new to me never has the remote worked.
    What I have done so far.
    Central locking works, and car can be started with EKA code.

    1.Checked battery voltage on car and remote battery.
    2. Checked fob at the landrover dealer its producing a 433mhz signal.
    3. Changed reciever with one from the Land rover wreckers.
    4. Tried to reprogram the key to the BCU can not get it to read the key press.
    5. The RF signal test with the nanocom fails does not see the key.
    6. Earth is good on the reciever.

    Where do I start looking next?
    Thanks.
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  2. 21st August 2021, 12:57 PM #2
    PhilipA
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    Maybe the replacement receiver is crook.
    Regards PhilipA
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  3. 21st August 2021, 04:10 PM #3
    PETER S
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    Smile

    Look on this link here you might have to upgrade the software for the nanocom to 1.36b also look on the nanocom forums.
    Nanocom programmable fobs? Where to source?
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  4. 21st August 2021, 07:45 PM #4
    1madgerman
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    Quote Originally Posted by PETER S View Post
    Look on this link here you might have to upgrade the software for the nanocom to 1.36b also look on the nanocom forums.
    Nanocom programmable fobs? Where to source?
    Ok just ran that update on the nanocom still no joy, any other ideas?
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  5. 21st August 2021, 10:46 PM #5
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    reefmagnet
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    Quote Originally Posted by 1madgerman View Post
    Ok just ran that update on the nanocom still no joy, any other ideas?
    Check the RF receiver isn't a 315Mhz unit?
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  6. 23rd August 2021, 04:57 AM #6
    1madgerman
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    Quote Originally Posted by reefmagnet View Post
    Check the RF receiver isn't a 315Mhz unit?
    Yeah both same numbers on the sticker on the reciever.
    I don't know if there a bench test way to see if the reciever is working or not.
    Ordered a new key to see if that helps or not.
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  7. 23rd August 2021, 07:28 AM #7
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    reefmagnet
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    I used an rtl-sdr dongle on the computer to verify the frequency of my fobs and to confirm they were transmitting a signal.
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  8. 26th August 2021, 08:48 AM #8
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    d2dave
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    Quote Originally Posted by reefmagnet View Post
    I used an rtl-sdr dongle on the computer to verify the frequency of my fobs and to confirm they were transmitting a signal.

    Can you transfer this into layman's terms for those of us not so computer savy?
    Dave.

    I was asked " Is it ignorance or apathy?" I replied "I don't know and I don't care."


    1983 RR gone (wish I kept it)
    1996 TDI ES.
    2003 TD5 HSE
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  9. 26th August 2021, 09:14 AM #9
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    reefmagnet
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    It's basically a plug in USB radio receiver.

    About RTL-SDR

    What is RTL-SDR? RTL-SDR is a very cheap ~$25 USB dongle that can be used as a computer based radio scanner for receiving live radio signals in your area (no internet required). Depending on the particular model it could receive frequencies from 500 kHz up to 1.75 GHz. Most software for the RTL-SDR is also community developed, and provided free of charge.
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  10. 31st August 2021, 06:02 PM #10
    1madgerman
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    Fixed, should have followed the kiss principle. Keep ⁴it simple stupid, it ended up being a corroded fuse in the engine bay it's all working now. Thanks everyone for your suggestions.
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