ECU EPROM Chip - What does it do?

[Mikol]

Cheers for the input mate

On the upside it seems the EPROM itself is a fairly standard component, can easily google and find the pin breakdowns. It has 15 inputs and 7 outputs, 512Kbit storage capacity. Good to know, lol

If someone with experience in mapping can tell me an engine map needs more than 512Kbit of storage space that's one rumour down already.

When I say transponder I mean the keypad immobiliser. Slip of the tongue (keyboard). Just edited the 1st post