I had posted about this before but had garaged the car and not fixed the problem. I made the mistake of jacking up my 355 with the alarm set which triggered the immobilizer and the alarm. I needed to put the car up on dollies to move it in my garage. For some reason the alarm would not shut off with the fob and the only was to disable was to shut off the battery at the master switch. I shut everything down and haven't driven the car for about 45+/- days. I have never had any alarm/immobilizer issues in the past and I and assumed that in shutting down the main battery it would reset the system. This morning I lowered the car off the dollies and turned back on the main battery power and the alarm immediately went off. Again it would not shut off with the fob and putting the key in the ignition did nothing either. The immobilizer is active and nothing is working. Any suggestions on how to correct the problem? Other than shutting off the battery is there any other re-set for the alarm/immobilizer?
There is another thing to try. From about 100 ft, hold down the fob button and start walking toward the car. That is supposed to reset the fob. Or, Suggest you remove the immobilizer controller behind the driver seat, send it to Gobble so he can find the code, and reprogram your fobs.
I don't understand how you got the alarm to stop by shutting off the battery. Does the alarm time out after a while? I had a problem with my '98 spider, where I couldn't turn off the battery without triggering the alarm. I'm not sure what eventually fixed it, but I tried closing all the things that were meant to be closed (doors, engine lid, etc) and let the car sit for a while. Have you tried using different fobs? Are your fobs original or clones?
I dont understand why the alarm shuts off unless the internal battery is dead. Even withthe master shut off I thoughtthe alarm will still go off.
It does on mine (if I haven't disabled the alarm beforehand). I think it's supposed to prevent would-be criminals from cutting off the battery to stop the alarm activating. Perhaps jacking up the car simply highlighted an existing back-up battery fault.... or you have more than one alarm problem.
Change the FOB battery, and see if that changes anything. Then change the car battery, could be a voltage issue.
Thats what I am saying. His alarm is not functioning correctly. The key fob all ways turns it off on mine. Try one of your other fobs.
I had this strand me once. #=%€#==!!! Ferrari! I wish gobble could delete immobilo So I don't have to ship to Australia or whenever. Answer use the pin code and start the car. That will reset the alarm if the fob will not shut it down. Worked for me...
Have you ever disabled your car battery and had the alarm go off (with the immobiliser active)? In this case, my alarm won't turn off with the fob if it has been triggered by putting the battery to the cutoff position. I have to turn the battery back on then use the fob to cancel the alarm. This makes sense to me because the immobiliser ECU will have no power to process the fob radio signal. As far as I know, the immobiliser unit doesn't have its own backup battery.... only the siren. The siren's electronics appear to have a memory. i.e. The siren seems to remember the immobiliser system state prior to the car's battery being switched off. The siren has 3 wires: Red wire: Car battery power (possibly from the front battery bus bar). I believe this power can be cut off using the car's battery cutoff knob Black wire: earth Green wire: from the immobiliser (pin D10?). Perhaps this green wire provides a trigger for the siren when the immobiliser unit is powered (and the alarm armed) and also provides an alarm disable signal (if the owner wants to turn off the car's battery). I think I'd be checking the car battery voltage before deciding to change it
Yes and what yo said is the same for mine. His battery would have to be very low but I do agree that could happen
Battery is relatively new and showing full charge on my ctek tender. I have one original fob and a clone from gobble. When I shut off the main power, the alarm continues to sound for about 30 seconds and then shuts off. The fob I am using seems to work fine (doors lock and unlock) other than the alarm/immobilizer issue. I will try the cloned fob and see if it does anything different however as I don't use that fob much it usually takes 200+/- pushes o0n the button for it to cycle back around to work.
Tried again today. Checked the batter and all good. Turned on the battery main and alarm goes off. Hit the immoblizer button about 150 times and the alarm and moblizier clears. WTF? Wish I could share some great words of wisdom on the fix but no idea. I had done this the other day to no avail. It's just typical MFF. More Ferrari F##kery! No one knows why. #MFF (Feel free to use this. It pretty much sums things up)
Interesting. Good to know (I assume it's normal). I guess there must also be a timer in the siren. The manual tells you to disarm/mobilise the car prior to jacking, but it doesn't tell you what the consequences are if you don't. When I had problems starting my car recently due to a faulty new engine wiring harness, I couldn't start the car even after I had fixed the harness. Fortunately, the car was at a Ferrari service centre. The technician first had to plug his diagnostic tools into the immobiliser unit to reset the immobiliser before he could reset the Motronics ECU with his SD1. How is your battery tender hooked up to the car. When you turn off the battery, is your tender still supplying power to the car? Is the alarm system really losing all its power? (EDIT: Sorry... You posted as I was writing this message... Great to hear you solved your problem !)
As you noted those cloned fobs get out of sync. Sounds like your other one is not transmitting. Gobble can now do a set of three fobs that function like the originals....no out of sync. And he'll take your old ones on trade.
I generally use my ctek tender with the accessery/cigarette adapter plug. That plug is hot all the time so it works when tbe car is shut off. In this case with the alarm running, i hooked the tender directly to the vattety compartment in the front to mame sure i had a full charge. My fob should not have been out of sync as i had just driven it using the fob right before the issue. Dont know why it wouldnt ckear before but did now. MFF Lesson learned on hacking the car with the alarm on.
Just to clarify.... When you said you wanted to try resetting the alarm by shutting off the battery for an extended period, I just wanted to confirm that the tender was also switched off. The immobiliser unit may still be powered if your tender/charger is still connected to the electrical system. Sounds like you've been celebrating your success
I just went and played with one of the immobilizers I have in my workshop. When the alarm is triggered, you have to hold the button down on the fob for probably 5 seconds to shut it off. A press or 10 presses or 150 presses won't shut it off. You have to hold it down and don't let off until the alarm shuts off. . Also, I'm not entirely sure how it works, but my understanding is there is a battery in the siren that acts as a backup should someone disconnect your battery when trying to steal the car. I've heard of that being an issue but have no first hand experience. The clone shouldn't have been (and sounds like it wasn't) the issue, but there are better solutions now.
Mark, Do you have a way to make the 5.2 motronic no longer look for the immobilizer? I would like to completely remove it. My immobilizer causes "me" much more problem than any thief.
I'm not aware of anyone figuring out how to completely remove the immobilizer. I would think that would take a pretty serious effort because it's tied into a few different parts of the car's systems. Not great for resale either....
Well one day if you ever figure that out let us know. Maybe a way to hardwire a FOB circuit board and splice it into whatever ecu wire and every time the key is turned the rolling code the ecu looks for is pressed. I know I know why not just press the button before you start the car? Well the reason is stupid stuff happens like problem peter has in this thread. I got trapped by it too once in the hot sun and I wasn't happy. LOL! As to resale value....I destroyed that long ago!
That’s great if you want to spend almost as much bypassing it as getting an entire new system from the dealer. The immobilizer still remains in the car.
