ECU question EJ22T

1-3-2-4 · Post by **1-3-2-4** » Wed Nov 09, 2005 12:04 am

I'm looking at the Pinout for the Legacy and I'm looking at the ECU for my 95 Impreza.

My VSS for the Impreza is E29 Pin 4

For the Legacy it's B58 Pin 11 Ok...

What has me a little confused is if I'm pulling my impreza engine harnless wires out from the EJ18 and putting the Legacy one's in Why would I need to work do hard in to finding the correct pinouts?

yes I understand some items on my car depend on the ECU and it's not direct on the engine. Like the VSS...

Having said that I was told I would need the Schematics for both cars?

vrg3 · Post by **vrg3** » Wed Nov 09, 2005 1:12 am

What?

azn2nr · Post by **azn2nr** » Wed Nov 09, 2005 1:22 am

your trying to do two things at once here.

if your swaping over the legacy motor and harness you shouldnt need the pinouts and the wiring should be fairly stright foreward with the exception of the dashboard.

if your not swapping the harness than you need the pinouts.

1-3-2-4 · Post by **1-3-2-4** » Wed Nov 09, 2005 1:48 am

I'm swapping the harness, but I was told some things in my 95 Impreza Not related to the engine but it still taps to the ECU might not be the same on the Legacy ECU.

azn2nr · Post by **azn2nr** » Fri Nov 11, 2005 12:37 am

now im really confused. there shouldnt be anything thats not motor related thats on the ecu. if your swapping the harness than it shouldnt matter.

btw can you send me the 1.8 pinouts. ive been looking for them

1-3-2-4 · Post by **1-3-2-4** » Fri Nov 11, 2005 12:51 am

Well I was told some stuff could be motor related but i'm like you... If I swap the harness then why wont it work??

Only Issue I might have is because my is a CA FWD model, it has a Fuel tank Pressure sensor & a Fuel tank Temp sensor... Only for FWD CA models

vrg3 · Post by **vrg3** » Fri Nov 11, 2005 2:03 am

Are you talking about when I said the wiring harness for the ECU was integrated into the body harness on the Legacy?

rallysam · Post by **rallysam** » Fri Nov 11, 2005 4:38 am

azn2nr - how do you understand what he is writing?

azn2nr · Post by **azn2nr** » Fri Nov 11, 2005 4:51 am

well i understand the 2 ways to do this swap and from what i can desipher hes trying to do both ways at the same time.

1234, if your gonna use the legacy harness and the legacy ecu and the legacy motor, there is no need for the 2 sensors you mentioned. just the ones that the legacy ecu uses. for example, youll need the legacy maf map and presure exchange ect ect.

edit to be helpful, you need factory knock sensor, maf sensor, map, pressure exchange, and boost control solenoid. bascily the knock sensor is under the manifold, you should know where the maf is and youll need all that stuff thats on the passanger side strut tower. all these will work with the legacy harness and ecu, if you use a maf that is not for the legacy you need to make sure that it will work with the legacy. some are missing a few wires, 3 to be exact.

Natoe · Post by **Natoe** » Sun Nov 13, 2005 4:59 am

i understand man... im in the middle of this swap right now.

i am NOT using the legacy harness... instead im using my 1.8L harness since it plugs into mostly everthing, then i cut the wires from the 1.8 ecu, carefully labeled them of course, and ill solder the ones that correspond onto the legacy ECU connectors. the ones that dont match up are taken care of individually, and all the boost stuff i pulled from the legacy harness, and LEFT it connected to the leg ecu so i dont have to re solder those ones on too.

1-3-2-4... if you havent, you need to check out my thread on nasioc "Rewiring my EJ22T" in the conversions forum

one thing i need to figure out is the ignition.... it looks like it should work, but vrg3 says i need to take care of something else, ill look into that.
-nathan

azn2nr · Post by **azn2nr** » Sun Nov 13, 2005 8:16 am

dude, you could have repined the harness instead of cutting and sodering. most of the pins should be the same size, save yourself alot of time and headache

Natoe · Post by **Natoe** » Mon Nov 14, 2005 3:17 am

ya know what... your right, i dont know how to get the wires out of the pins though, and i thought you couldnt really. but oh well, its going smooth and we have lots of the reconnecting done. (crimp+heatshrink..)

azn2nr · Post by **azn2nr** » Mon Nov 14, 2005 3:38 am

cool cool. it took me a while to figure it out. but i got it now.

Natoe · Post by **Natoe** » Mon Nov 14, 2005 3:40 am

can you explain?

vrg3 · Post by **vrg3** » Mon Nov 14, 2005 4:07 am

I don't think he's talking about taking the wires out of the pins; he's talking about taking the pins out of the connectors.

Natoe · Post by **Natoe** » Mon Nov 14, 2005 4:30 am

huh? like out of the ecu?

vrg- there are a couple things on the legacy ECU that have their own grounds, but on the 1.8ecu all ground in the same thing... can i just ground them all in the same place on the one wire? i assume so since they are just grounds.

about that self shutoff thing... the impreza you were talking about in that thread did it not have self-shutoff so you told him how to get around it? because mine DOES have self shutoff (mine is a 95, OBD "I-1/2") and all the wires match up, but it still wont work?
thanks

vrg3 · Post by **vrg3** » Mon Nov 14, 2005 5:29 am

Out of the harness, not the ECU.

Are you talking about the sensor grounds? Yeah, joining them should be fine... make sure you're aware, though, of which ones are grounds provided by the ECU and which ones are provided to the ECU.

All Imprezas have self-shutoff.

azn2nr · Post by **azn2nr** » Mon Nov 14, 2005 7:00 am

yeah im talking out of the harness connectors. if you go get the harness plugs from the junkyard and pull all the pins out. then carefully do the same on the 1.8 harness and mark them then repin them into the empty harness plugs you wouldnt have to soder so many wires. not to say you elminate sodering but you take care of alot of it.

Natoe · Post by **Natoe** » Mon Nov 14, 2005 8:27 am

well actually... there arent really many plugs i need to change over in the engine bay. cam and crank sensors match up, injectors do of course, even the IAC does, 02 does, TPS and MAF are the only things i have to change over, but the maf im running straight to the ECU ( i left it all connected and ran it through the firewall) so really just the TPS i need to add a wire.

azn2nr · Post by **azn2nr** » Mon Nov 14, 2005 10:34 am

i really need to figure out how to be more clear but im talking about the harness plugs into the ecu not the motor

Natoe · Post by **Natoe** » Mon Nov 14, 2005 7:06 pm

oohhh.. well ive gotten those out fine... i dont know how that cuts down on splicing though, it sorta did since i fed the plug with all the boost stuff connected through the firewall so i didnt have to splice those ones back in.

1-3-2-4 · Post by **1-3-2-4** » Fri Jan 27, 2006 5:46 am

hmm I might be back onto the Ej22T, I found a place that has them for around $638 only thing is they are used engines but they have a 30 day warranty.

I guess a Full teardown would be best before running it?

If anyone wants to know the site it's partsjobber.com

Natoe · Post by **Natoe** » Fri Jan 27, 2006 8:33 am

have you checked yet if they have them in stock even? they may just list everything and then when you try and get it it tells you whether or not its in stock... it seems like they wouldnt have ALL those parts in stock... not sure though

1-3-2-4 · Post by **1-3-2-4** » Sat Jan 28, 2006 12:24 am

Sorry, I got so tied up in finding the front rotors for me car, Only for them to give me the Wrong rotors at 2 Auto stores!!

they both gave me rear rotors when I asked for Front rotors, so I pretty much been running around since 9Am this morning, I will give them a call tomorrow, I take it you want to know about the Ej22T as well?

On the upside I FINALLY picked up a Hanyes Subaru Legacy repair manual, lol I've picked it up so many times to read it in the store, but I finally got it today, pretty helpful, and helpful come time of the swap.

Natoe · Post by **Natoe** » Sun Feb 19, 2006 5:12 am

vrg3 wrote:Are you talking about the sensor grounds? Yeah, joining them should be fine... make sure you're aware, though, of which ones are grounds provided by the ECU and which ones are provided to the ECU.

crap, i believe THIS may be my problem now, how can i tell the difference between grounds provided to the ECU and ground provided by the ECU...?

sensor ground, injector ground, and main power ground are the only ground provided to the ECU, and then individual sensor grounds are provided by the ecu? but i can ground them all to the body to make sure cant i?

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ECU question EJ22T

ECU question EJ22T