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F430 key fob doesn't work

Discussion in 'Technical Q&A' started by azzurribaggio, Jul 14, 2019.

  1. So my 2nd key fob didn't work so I replaced the batteries in them and tried to arm the car but it still doesn't work.
    What is the next step now?

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  2. f355spider

    f355spider F1 World Champ
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    May 29, 2001
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    Hugh G. Rection
    Do you have a way to test the batteries? It is not unheard of to get defective ones. Or try swapping them with the batteries in the known good fob. Also double check the polarity. Sorry I don't know the key initialization process. If it isn't in the owners manual, it might require the assistance of the dealer. But I thought the initialization was only required once for a new key.
     
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  3. I put the two batteries in two different styles, both with " +" up and another time with the bottom "+" down and the top "+" up. unfortunately I didn't see the polarity of the old batteries when they came out.
    I hesitate to remove the batteries from the working one because I get nervous removing those covers! But that for sure would eliminate a few things so I'll try it out.

    Thanks!
     
  4. whatheheck

    whatheheck F1 Rookie
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    Mar 27, 2006
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    Dan L.
    As mentioned double check battery voltage. Some are old stock and voltage is too low.

    If not the dealer will need to reprogram your keys for you. You will need your key code.

    Expect to pay between 1 - 2 hours of labor.

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  5. Eric C

    Eric C F1 Rookie
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    Does it start your car or are you just having issues with locking the doors?
     
  6. Just cannot activate the alarm, I used this key fob to go for a drive a few weeks ago, when I got to our destination and tried to lock the car is when I first realized I couldn't activate the alarm.

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  7. whatheheck

    whatheheck F1 Rookie
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    There's an alarm reset procedures listed here somewhere. Kindly do a search.

    Also try doing a battery/ master power reset.

    Dan

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  8. Btw what should the polarity of both batteries in the key fob be? Both "+" facing up?

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  9. f355spider

    f355spider F1 World Champ
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    May 29, 2001
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    Full Name:
    Hugh G. Rection
  10. f355spider

    f355spider F1 World Champ
    Rossa Subscribed Owner

    May 29, 2001
    16,663
    USA
    Full Name:
    Hugh G. Rection
  11. Motob

    Motob Formula 3
    Professional Ferrari Technician

    Nov 11, 2003
    2,029
    Berkeley, CA
    Full Name:
    Brian Brown
    The alarm system has a rolling code, which means the code changes every time you lock/unlock the car. If you have a key that has not been used in a while, the code can roll so far that alarm fob will lose synchronization with the system.

    You can try to synchronize the fob by pressing the button until the code rolls enough so that it will work again. I have had fobs that have required 100 to 150 presses of the button until the fob works again. It doesn't take long, just press the button until the alarm responds again. If the fob will still not synchronize, use the procedure below to get it working (this is usually only done for fobs that have never been programmed to the car)

    To synchronize the Alarm Transmitters you must have one functional key.

    1. Using a functional key remote, slowly press the button sixteen times. This will

    enter the self learn mode as indicated by the LED not responding.


    2. Select one new key, press the lock button ONCE


    3. Select the second new key and again press the lock button ONCE (If more keys

    are available repeat step 3 accordingly)


    4. DO NOT continue to press lock/unlock button on the keys, this will cause the

    system to loose synchronization.


    5. To exit the self learn mode, install any key into the ignition and cycle the ignition

    one time. (If the door is locked after the last key is entered, do not use the lock

    button to open the car, use the key in the lock cylinder.)
     
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  12. So I tested the batteries with my volt meter and they are good, 3v reading.
    I'll try pressing the button 100-150 times (hopefully not that long) as motob stated above.
    For the 5 step procedure, in step 2, I don't have a new key. What do I do at that step?
     
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  13. BigTex

    BigTex Seven Time F1 World Champ
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    I have found that a local locksmith, if they are GOOD at modern systems can help you out, if the dealer is too far or too dear a cost.

    Ducatis have almost the same system as Ferrari is using, and they can examine your working key for codes, and so forth.
     
  14. Motob

    Motob Formula 3
    Professional Ferrari Technician

    Nov 11, 2003
    2,029
    Berkeley, CA
    Full Name:
    Brian Brown
    The procedure is to get the alarm system to learn new keys. You are trying to get it to learn an old key that the system is not recognizing. So where the instructions say "new key", you are going to use the key that you have that doesn't operate the alarm system.

    Since we know that the key that doesn't operate the alarm is for the car (as it starts the car and works in the locks), I have to assume that the alarm system learned this key in the past and now the code has rolled too far or the alarm remote portion of the key is malfunctioning.

    If pressing the button 100-150 times doesn't work, try the relearn procedure. If that doesn't work, you can take the key to a locksmith that has a device to see if the alarm fob has a good output signal. if it is broken, then you will need to get a new key/alarm fob, have the key cut to match the original, and swap the tiny immobilizer chip (The five sided chip in the upper right portion of the key in the photo above to the new key. You will have to then perform the alarm fob learn procedure as outlined above.
     

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