hi Guys
i am Nico from South Africa.
my car knowledge on ECU and BSI and imobilizers is not that great. but my electronics is not to bad . i build staff for a digital communication company. i do program on micro c chips from micro chip in C++ , so i understand something on the programming part like EEprom, and ram Rom data etc.
it cant be so dificult is always my moto.

we bought 2 citroens c3. 1 was stripped and the other in an accident
we start to build the parts over in the engine compartment but not the BSI
the unit did not start. we later changed almost everything , PSF fuse box, BSI , transponder coil + key. unit did not start.
we checked the system with a delphi OBD to found the ECU locked , i think it was because the bsi and the ECU did not match.
now need a 4 pin code to unlock it.
can someone help. the agent was not very help full.

the vin number is VF7FCNFUC26632725
some software number 9649811380
software version 33
index 2

ECU ref 506971
if someone can help please.