key fob problems

[joffy79]

hi im back on repairs and i have an issue with my key fob being
when i prwss the button the light doesnt come on
i can still lock the car with the key but it doesnt activate the imobiliser or alarm
does any body now of a solution
(i have changed the batterys)

please help !!!!!!!!!!!!!!

[GialloEvo94]

If the light doesn't illuminate with new batteries then the circuit in the fob is either dead or faulty.

If it's the RF system with the remote in the key then you might be able to get the circuit repaired (search eBay for "Alfa Key Repair"). Otherwise you can purchase a second-hand key with a working circuit and just swap the circuit into your own key, then code it you your system.

If it's the IR system with a separate square black fob then there is no repair option currently available that I know of so you will have to purchase another fob (either new or secondhand) and then code it to your system.

[joffy79]

ok so iv got a recond circuit for my key quite easily from ebay person (cheers for the tip ).
i rang alfa for my alarm unlocking code only to be told after being on hold for 20 mins that they didnt keep the codes for it as it was to old .now my question is is there any way to find out the code or reset the reciever and allarm box to a virgin state to recieve a new code?
also to make it more difficult i dont have the master key
also when i disconect the battery and take out the ECU (so as not to fry it )when i connect it all back up will the alarm arm or will it remain off?
because if it will stay disarmed when reconected then its not such a problem as its only the welding that is stopping me getting a MOT

hope youl can help !!!!!!!!!!!!!

[GialloEvo94]

I've sent you a PM about getting your remote receiver virginised.

You don't need the master key to program red keys to the remote receiver so nothing to worry about there. The master key is only used to program red keys against the immobiliser which is a separate system to the remote central locking / alarm.

When you disconnect and then reconnect the battery again, the alarm returns to the same state as it was in before you disconnected the battery. If the alarm was armed then it will re-arm itself again (the siren will beep and the indicators will come on momentarily as you reconnect the battery). If the alarm was disarmed it will remain disarmed.

If you're talking about removing the ECU during welding then you don't need to actually remove it completely. Just disconnect the plugs from it. It's also safer to leave the battery connected and use a surge protector across it during welding which avoids the alternator being fried. This is what I did when I was welding mine up and I've just got one of the cheap Draper surge protectors that cost me less than £15. Some people don't bother doing any of that and haven't had any problems but I do it as a precaution and for peace of mind. As long as you make sure the earth clip of the welder is connected as close to the welding area as possible then you shouldn't really have any problems.

HTH

[joffy79]

exelent !!!!!!!!!!!!!!!!!!!!!!!!
iv sent a pm reply -question
thats brilliant news thanks for that i can get the welding done and mot`d so im on the road again il keep youl informed on progress

[HelsBels]

Hi Joffy

I had a similar problem with both my key fobs, the light came on on one of them but not the other and even with new batteries the buttons would not work so I had to resort to locking/unlocking the car manually with the key. This of course means the car immobiliser is not set.

After looking on forums on here and searches on google I was directed to this site on e-bay and so I thought for just under £30 I didn't have much to lose! (Alfa garage quoted £300 for a new key - and couldn't even tell me without booking the car in what the problem might be)

http://www.ebay.co.uk/itm/ALFA-ROMEO...item45fbd39f6c

So this morning I received my key fob back from P&D keys and - YAY! it works - unlocks/locks/imobiliser sets and something which has never worked since my boyfriend bought the car a couple of years ago - the boot now unlocks from the key fob!!

I recommend this company and am one very happy customer - will be sending the other key off next week! hope this helps!

[GialloEvo94]

Joffy's problem was a little different. He had a remote key circuit that had never been programmed into his car. Without any of the 4-digit security codes from the original keys to his car there was no way to program the new (alien) remote key circuit to his car. In this situation, the only way to do this is to virginise the remote receiver which then allows any remote key to be programmed into the receiver for an initial period of time without needing to know any security codes. This has now been done and his remote central locking and alarm are now working again

Just one other point to mention is that you appear to have a 147 which uses a different system to the 145/146 so the same fix for a 147 won't necessarily work for a 145/147.

Anyway, glad you got your problem sorted

[joffy79]

Hi update
Yes problem solved thanks gialloevo your a genius
Iv now got another key blank from ebay for £30 had it programmed and cut for £30 quid
At a local locksmiths used the new code and programmed it into receiver
Voilla two fully functioning keys .it saves a lot of money and time asking the guru's on here
Cheers guys