mrfred

iTrader: (50)

I decided to go through the USDM Evo 9 Factory Service Manual this morning to verify the GEMs Evo 9 ECU pinout that's been circulating around on EvoM. Turns out that the GEMs pinout only partially correct for USDM Evo 9. I'm guessing that the GEMs pinout must be for a JDM or EDM Evo 9. I've posted my current draft of the USDM Evo 9 ECU pinout here. There are a few descriptions that are probably not yet totally accurate, and I don't have wire colors yet. I'll add that stuff later.

I kinda got carried away on this because I'm trying to find the unused ADC inputs on the USDM Evo 9 ECU. Got something in the works...

EDIT: Pinout updated with info on unused pins on ECU.

Feb 2, 2008: Pinout updated with more info on the 12 V power pins.

Jan 1, 2012: Updated pinout with more detail on the fuel pump relays and some other things.

kreionic

iTrader: (14)

Good stuff man. I am assuming the colors would match up to the GEM's? Atleast for the ones that are they same

TouringBubble

iTrader: (2)

Good to know. I've been using the old pinout and luckily everything I needed has been correct. Thanks for taking the time to define this for the USDM cars.

MR Turco

iTrader: (16)

I posted this same question a while back in the other pinout thread. So does the IX have an EGR? I have never heard of VVT equipped cars to have EGR systems nor do i see one anywhere on the exhaust but i see it listed. I am guess maybe it is just there but the ECU ignores it???

mrfred

iTrader: (50)

Yes, the USDM Evo IX has an EGR system. The ECU does not ignore it.

MR Turco

iTrader: (16)

Where in the exhaust stream does it bypass some of the gases though?

Skylineracer

iTrader: (21)

thnx!

mrfred

iTrader: (50)

The passage from the exhaust to the EGR valve appears to be built into the cylinder head.

MR Turco

iTrader: (16)

Oh ok that would make sense then. I have seen pictures of the JDM motor where the two nubs on the exhaust manifold have lines coming out of them that appear to be EGR. That is how i am used to EGR systems being used. In some cars they use cam overlap to grab some of the exhaust back into the cylinder. I am surprised mitsu didnt so something like that. Anyway thanks for the info.

kaonashi

iTrader: (34)

Oh man i think i found my problem.............

mrfred

iTrader: (50)

Those are the lines for anti-lag. :-)

MR Turco

iTrader: (16)

^^ oh hot!

mrfred

iTrader: (50)

New version of pinout attached to first post. Fixed a few errors and added a little more detail.

mrfred

iTrader: (50)

Added more info on 12 V power going into the ECU.

Richard L

iTrader: (5)

Mrfred,

Good info, I have just received the US EVO9 ECU - square pins!