Peugeot/Citroen Keypad

[the_big_d]

Hi, Just been having a bit of a clear out of my garage & found a Keypad from the old Citroen & Peugeots.
Now i know the PIN is stored in the ECU but my understanding is the last code that unlocked it is stored in the keypad?
So just for fun/practice how would i go about extracting the PIN from it? which of these chips is it hiding?

[davorOS]

MOTOROLA MCU