Hi all. I've collected a few different ECU pinout drawings and wiring codes and combined the best descriptions into one. A couple were sourced from forums, one was a 3-page scan of a Mitsubishi document, and a couple were sourced from cross referencing to the 4G93 diagrams to see if the pinout had the same use or a better description. Nearly all of the info when put side between each of them matched up or made better sense which helped confirm each pinout. Basically I was comparing and confirming each pinout and entered the data into an excel spreadsheet (I sort of copied a layout someone did a while ago which I thought was a good idea but I added better descriptions to it).DOWNLOADABLE PDF FILEhttp://www.mediafire.com/?2guqyy3wl2y
orhttp://www.filefactory.com/file/ah4eeha ... INOUTS_pdfALSO
Anyone doing any serious work regarding these EVO ECU pinouts (engine converions, different computers, rewiring etc) also needs to know the pinouts of the main relay. It is called the "MFI Relay". It has 2 relays in it, one controling the fuel pump. The other sends power to the sensors, injector resistor, and the ECU. It is important to see a wiring diagram to see how the relay interacts with the ECU, pinouts are not always enough.
On some Mitsubishis, the fuel pump side of the relay is momentarialy powered by the starter signal while cranking. On the Evo I,II,III the starter signal is sent to the ECU. The ECU then decides when to activate the fuel pump relay (and it does this while cranking).
Not all Mitsubishi MFI relays are wired the same. The Evo I is a 8 pin connector and these are the pinouts.
1. to fuel pump Black/blue
2. sensor power Red
3. Main power to ECU, pins 12 & 25 on ECU
4. 12V power Black/yellow
5. fuel pump signal, from ECU pin 8
6. power signal, from ECU pin 38
7. Ignition and also pin 62 on ECU
8. 12V power Black/yellow