====== 1G Non-EPROM Conversion Process ======


Someone asked us to explain what was involved in the non-EPROM conversion process and I thought it was a good question we hadn't covered before. This page outlines the basic process.


This page shows the process on a 1G ECU. The 2G conversion process is even more complicated and delicate! You can see pictures of the 2G process here.


[[:nonepromprocess2g|2G non-EPROM to EPROM conversion page]]

===== Initial Non-EPROM Board =====
The following picture shows an original non-EPROM board, ready for modification (click to enlarge).

{{https://www.ecmtuning.com/images/forums/ecurepair/noneprom-cpu.jpg?350x280  }}

===== CPU Removed =====
The first step is to carefully remove the CPU and make a few other modifications to the ECU's PCB to prepare it for our conversion.  The following picture shows a board after this step is complete (click to enlarge).

{{https://www.ecmtuning.com/images/forums/ecurepair/noneprom-nocpu.jpg?350x280  }}

===== Adapter Plug =====
After the CPU is removed, we have to install an adapter plug in its place.  The following picture shows a board after this step is complete (click to enlarge).  Note the careful solder work involved on those pins.

{{https://www.ecmtuning.com/images/forums/ecurepair/noneprom-plug.jpg?350x280  }}

===== Finished Product =====
The final step is to snap our specially designed conversion board into place. The following picture shows the finished result (click to enlarge).

{{https://www.ecmtuning.com/images/forums/ecurepair/noneprom-done.jpg?350x280 }}