Fob problem

According to the user's manual on the alarm system, you press the fob 3 times within 10 seconds, and it is supposed to resynch with the car.

Note that this has never worked for me.

 

serch posts,is only one man for that job ,he fix mine ,never a problem again .unfortunaly i cant remember his name .

i think his name is GOBBLE?

 

Just a thought : look up the range extender thread as it could just maybe be your aerial and you are trying to plip right at the end of the range

 

Did you check the FOB batteries ? If they are even a volt lower could cause problems ....

 

Philip- It sounds like you may have two fobs, one of which is a clone of the other. If that is the case, it is guaranteed they will lose rolling code synch every time you switch fobs. Easiest thing to do if that is the case, is to alternate fobs every time you drive her. That way, you will keep the extra button pushes to a minimum (only the number of times you used the fob on her during that drive).

Many Ferraris out there now in the used car market have only one good fob and a clone of that fob since Gobble and Eric355 have been cloning fobs for several years now. The clone has exactly the same fob ID and rolling code sequence as the original and the Alarm ECU will not accept a rolling code it has already seen. This is to prevent someone from recording your fob transmission and later using it to unlock your Ferrari. Same rolling code technology is used in garage doors to prevent burglars from opening your garage door by recording your opener signal.

Did you get the Alarm PIN with your 360? If you did, you can buy a set of 3 matched fobs with a new PIN from your Ferrari dealer and program the Alarm ECU to accept the new set of fobs and new PIN. Here is how to do that yourself if you got lucky and have the PIN.
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There must be some fudge in the codes, otherwise if one accidentally presses the fob when not nea the car, you'd be out of sync.

So it's probably a range (warning - geek thing) such as:

n
n+1
n+2
....
n+ 10

is acceptable. Encrypting "n" would be good as well to stop someone from recording and just bumping the repeat code by one.

 

Don- No, it would not. If you press your fob's button, it generates a new rolling code the Alarm ECU has not seen. Press it again, same thing. So you can press the fob 100 times and it will generate a rolling code 100 times that the Alarm ECU has not seen. You would have to go to ~64,000 presses before you duplicate the rolling code, and by that time the ECU would have forgotten that original code. So you can press the button 100 times 3 miles from the car, walk up to it and the next button push will disarm the alarm and immobilizer.

Problem only occurs with two fobs with the same rolling code sequence, or possibly a malfunction.

The codes are alphanumerics with an algorithmic change and not a simple numeric code increasing by one per button press. Too easy to defeat if it were done that way.

 

Philip- Yup, that explains it. I thought Gobble included an instruction sheet that explains how a cloned fob works, but maybe not.

Alternating frequently will ameliorate the problem, and at least limit the number of times you have to press the button.

 

My clone has gone hopelessly out of synch after not using it for years. I am thinking of building up a solenoid that automatically activates it 64,000 times while next to that car. Once every 2 seconds, 30 times a minute, 1800 times an hour, about day and a half.

 

Is this the same for a 355 I have the Red fob(no hassles at all) but the black fob works sometimes and not others??? So just push the black fob button 3 times and it should work?? Cheers

 

Yes, it uses the same system.

 

Paul- Your black could be a clone of your red fob, but if it works part of the time, probably not. Replace the battery: pinch the contacts together first, install the battery and spin it to rub off any corrosion. If you can see corrosion, remove it with a small file or emery paper or stick. Or scrape with a knife blade until all bare metal.

Ferrari recommends replacing the batteries every 6 months, but so far I have gotten by fine with every year. I do mine on New Year's Day.

The document posted above shows the Duracell MN21B, which I like best, but any 12V alkaline battery of the correct size will work. Wish somebody made a lithium battery that would work.

 

AHHHHHHHHH! Taz you are a genius. My 355 has been stranded since my only black FOB died and would not transmit any longer. I sent it off to be cloned and when I got it back, I had to push it several times before it worked, but it did. I drove the car once and when I went out to restart it, it again took several tried to get it to work. This made me wary so I drive it home and parked it in the garage where it has failed to ever respond to the new cloned FOB ever again. Since this is a clone of the old remote, it is probably seeing a code it has seen before and not allowing me to start the car.
Is there anything I can do or try while I am waiting for my new PIN and FOB set from Ferrari?

 

Well, what do you know...I pushed the button three times in less than 10 seconds a few times..and the car is running for the first time in a few months! Bizzarre.

 

Edward- I love a happy ending. That trick does not work all the time, but glad it did for you.

 

This is normal behaviour. From the alarms perspective there is only one fob. A clone is a clone, identical. The keelog algorithm typically allows a code to be off by up to 3 steps. That means if you use one fob more than 3 times the other goes out of sync because it won't generate a code that is within 3 of the current/expected code.

 

Which means you should be able to press it quickly 3 times within 10 seconds and have it resynched, but it never did work .

 

No, for a lot of reasons. In a simple world the question would be how many times did you push Fob A? It would take that many to get Fob B to the same code set. BUT Keelog keeps a count and after a specified number of wrong codes it looks for a resync.

 

You can only use one fob at the time, if you unlock the car with one you can not lock it with the other, this is normal ....

 

Do you have an idea what that "count" is before key log looks for a resynch ?