Where a factory alarm is fitted, this unit controls the remote central locking and alarm activation. If the key is not working with the system and the red light is flashing on the key, the key has become un-paired. To re-pair the key with the system, you need the 4-digit code of a key that is known to remotely unlock the car (not the code of a new key). The code is available from Fiat for around £25 per code or you can find alternatives to extract the code from the PCB in the key for around £10. Do not replace this unit with a second hand item without the code. New units are unlocked by default and will pair with any key. Key pairing process is in the service manual. Note: if fitting a new unit, read the service manual regarding pairing a key for the first time – even if you already know the process - as after the key is paired, the country code for the alarm must be set.
Remote key
The surface mounted switch on the PCB of the key tends to become loose after a while. To fix, get a cheap soldering iron and just press it on the contacts to re-solder it back to the PCB.
Alarm country code
The process for changing the country code is outlaid in the service manual but if you are changing it because you lights don’t flash or alarm doesn’t chirp on arm/disarm, note that code 5 (UK) causes the alarm to automatically arm itself after 60 seconds which can be very annoying. Set it to code 8 (EU) and it will flash and chirp as it should but not automatically arm.
المفضلات