Transponder key programming

[davss]

Hi,

I have a Yaris from 09/2002 CDX 1.4 D-4D UK and recently replaced a falling apart original black remote key case with one that was cut by carkeyhelp.co.uk from a tag number attached. All the other keys have been lost by previous owners. To my surprise the new blank key was cut perfectly and all is working fine despite a couple of bad reviews of this website. Now, after reading some forums that it costs about £200-900 to replace ECU if I loose my only master key I got back to them to enquire about a transponder key (they said they'd not get a good price for new remotes and that should get from Toyota). A transponder key with no remote is about £18 including cutting so this is the most optimal option for a car worth mere £1400.

The problem is that instructions to determine which key I have from these guys/internet don't match i.e. they say after inserting master key into ignition without turning the security light should go off instantly but it keeps flashing as if no key was inserted. Also, if it was a valet key the security light would go off after 2 seconds so it's not the one I have either. Then last one states that if my key is unprogrammed the security light would keep flashing. This is what's happening in my case but with this key I can operate all functions and start my car (have been using for the past 3.5 years). So, none of the three information is correct in my case and the security light only goes off instantly when I turn my key to ON position when all dashboard lights come on. Therefore, am now puzzled and not certain what key I have and whether it's worth getting another one cut with transponder that can be programmed using various techniques available on the internet.