key doesn't work alarm - Alfa Romeo Forum
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(Post Link) post #1 of 7 Old 25-11-02 Thread Starter
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key doesn't work alarm

I've had a problem with one of the two red keys since its batteries failed and were replaced. It doesn't operate the alarm - the other one works fine. Has it got out of sync with the receiver?
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I've got this problem too, got one ket that works and one that doesn't. Hey we didn't both drop our keys close to each other...maybe you have my spare one lol.

Any help would be appreciated, dont fancy a 1500 bill if i lose my keys wink
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I have this problem too - it happens when the rolling code in the key and the receiver gets out of sync - it is recoverable, but you need the 4 digit pin code for the receiver which is located in the rear interior light (on 155) - with the pin you can relearn the code into the receiver and off you go!!


(Post Link) post #4 of 7 Old 02-12-02 Thread Starter
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Hi JamesM - whats the procedure for doing that?
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Is there a secret location for the code on 145/146's? We don't get a code card in the UK and although it should be on the Alfa database it invariably hasn't been entered.
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HI guys - here's the procedue (it was posted by somebody on the forum):

First ensure that the alarm is turned on at the glovebox.
1. Press the button on the Rx for approx 2 secs. The LED should flash for
the whole time you hold the button.
2. Release the button. After approx 2 secs the LED should flash once. This
is a request for the first digit.
3. Press the button the number of times corresponding to the first digit, ie
if the first digit is 4, then give 4 presses. Every press should cause a
brief flash.
4. Approx 2 secs from the last press, the LED should flash again to request
the second digit.
5. Continue in the same way for the other 3 digits. If a digit is 0 then
don't press at all, just wait for another request flash.
6. Having entered all 4 digits, the LED will either stay oncontinuously
meaning that either there has been an error entering the code, or the code
is incorrect. Or the LED will flash, meaning that the code is good.
7. At this point if the LED is flashing, hold the rx button down and press
the tx button.The rx LED should light continuously if the code has been
8. There is a country setting procedure that follows but I'll omit this as
it defaults to EEC so don't do anything.
9. The rx LEd should now flash 6 times to show all is OK. If you get 18
flashes start again from point 1.
10 Repeat for key 2.

If you do not have the correct code, check what the National Security Agency
have on record, (that the sticker you should have on the windows, or a
dealer can check for you), as they are given all the key and immobiliser
codes at the time of importation.

If none of the above works at all, then you are looking at a new roof rx
(90) and 2 or more new keys (50 ea) plus fitting and programming.

As for the code location - I don't know - I don't have mine so I'm stuck with one key, and I think as atated above, the only way to fix this is with a new receiver unit

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Member car:

155 Q4

can you change roof reciever without the change of keys as i think its my reciever that ats fault , i have full lockset for 156 with number cards but diff system same locks though if anyone has a reciever that is definately ok id swap lockset for it but remember someone saying you cant use one from another car?
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