Nope, not another 'how do I clear mine' question!

I was having no luck with FiatECUScan - I appear to have a TRW2 airbag ECU rather than a TRW MY97 and it was unable to detect the ECU. If you have the paid FES you could try the Alfa 156 Allied Signal Airbag which might work apparently.

Since I didn't want to buy FES on the off-chance that it might possibly work I downloaded this app:

http://www.peter-feil.eu/~peter/obd/trw2scan

His main site appears to be down at the moment (download link above still works) so I accessed it through google cache - please read the warnings!

http://webcache.googleusercontent.com/search?q=cache:IQTJB_BqdXsJ:peter-feil.eu/mediawiki/index.php/Trw2scan+trw2scan&cd=1&hl=en&ct=clnk

Anyway I ran it like this:

trw2scan trw2.obd

It found a low voltage error and cleared it for me. I hope this helps someone else out!