please look for a barcode that starts with C7 the only CLARION code available for free (using a serial number ) from anywhere on the Internet is if your radio also has a BARCODE SERIAL NUMBER beginning with C 7000000 + + + + on a label somewhere on the metal casing.
If not then it will only be available from your Main Dealer or a Decoding Service or your local Car Radio / Audio Store who will connect a laptop to read/recode the memory chip (EEPROM) inside your radio
Thanks for your reply, I did have the code via a paid for service on the internet, but like a fool I am I forgot to write it down, so shows it can be generated without connecting it up to a code breaker etc, as I gave them the SN and they e mailed me the code
If it does not have the barcode Serial Number then it cannot be obtained for free or even calculated using a Code Generator..It has to be looked up on a multi million database which is not commercially available to buy as software.
However there are several of the Professional Decode Services who have access to this original factory database so they are able to provide codes from the Serial Number beginning CL++++++++++++.
However as you already know from the previous time , you have to pay !