the car is vw caddy 1.6 tdi model -12 . i have changed the injectors and they have to be matched whith the ecu box so i need the security access code to the box. sorry i didn't make my self clear.There is a different number on each injector that has to be put in to get the wright amount of fuel in the cylinder.
The security code he needs to enter before he is allowed access to coding any of the new diesel injectors . I believe PIN code is another name for Security code which allows you to perform changes.
Which Tool are you using............? If you have Vag-Com than try go into Engine ECU>>>>Security Acc>>>>you will see code for enable adaptation>>>Adaptation and see options in drop down .............