Ej22t swap into 93 NA legacy with Rob tune wiring

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turbo wagon
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Ej22t swap into 93 NA legacy with Rob tune wiring

Post by turbo wagon » Mon Feb 17, 2014 6:44 am

I have found this information scattered on many Different threads but not all in one place for my kind of swap. I am swapping a ej22t into a 93 legacy wagon NA 5 speed with a Rob tune ecu. There are wiring projects to do for the turbo swap into NA car, Rob tune ecu, and 4 to 2 ignition. Most everything about each separate wiring project was covered in other theads but there are Some of questions I still have after comparing the ej22 wiring to the ej20g wiring. I will list everything I've found plus the questions that arose while doing the research.

ej22t into 93 legacy NA-

B56.1 crank + switch with B58.4 cam +
B56.2 crank - switch with B58.5 cam -
Wire in MAP to B48.3 power, B48.4 signal, B48.5 ground, B48.18 shield
Wire in Wastegate to F47.3
Wire in pressure exchange solenoid to F47.20
The barometric pressure sensor that was inside of the NA ecu is now a part of the MAP sensor.
Use the NA intake wiring harness and move the wires for coolant temperature sensors

Rob tune ecu-

De-pin F47.6 purge control
De-pin B56.11 California pin
De-pin B48.5 MAP ground and merge with B48.21
Ignore the absent wires on F47.4, F47.16 and B48.12

The questions I have:
1- B58.6 cam shield, there is no connection there in the ej20g. Do I merge this with a different shield wire?
2- B58.8 maf pin 5, there is no connection there in the ej20g. Is that a problem?
3- B58.9 neutral switch, There is no connection there in the ej20g. Is that a problem?
4- B56.15 and F47.18 select monitor, there is no connection there in the ej20g. Is that a problem?
5- did I miss anything else involved with my swap?

Thanks,
Derek
93 legacy wagon 5speed -Ej22t swap
92 SVX
86 vanagon with an SVX swap
01 outback the lactation-station-wagon

MikeyMeyagi
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Re: Ej22t swap into 93 NA legacy with Rob tune wiring

Post by MikeyMeyagi » Mon Feb 17, 2014 4:35 pm

1. no
2. no
3. no
4. no

my old car had the same setup, i never even de pinned the wires the 20g ecu didnt need, however i did merge the map ground. you have all the steps covered, if you do them correctly your car should run just fine.
94 Supra Turbo 6 speed. build in progress
98 Lexus GS300, single turbo 2JZGTE swap. daily driver
93 Impreza wagon, home brewed n/a-t ken block themed winter drift missle

*sold*
94 Alpine Sport Wagon... STi conversion, rotated turbo etc

Legacy777
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Re: Ej22t swap into 93 NA legacy with Rob tune wiring

Post by Legacy777 » Mon Feb 17, 2014 7:04 pm

turbo wagon wrote: B56.1 crank + switch with B58.4 cam +
B56.2 crank - switch with B58.5 cam -
The above wiring should just be:

Swap B56.1 crank + switch with B58.4 cam +

You don't need to swap the negative leads for the cam & crank sensors

turbo wagon wrote:
The questions I have:
1- B58.6 cam shield, there is no connection there in the ej20g. Do I merge this with a different shield wire?

Thanks,
Derek
The 92 liberty FSM that I have shows the cam shield being run to that same pin. Did you read something specifically that says there isn't anything at that pin?
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm

turbo wagon
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Re: Ej22t swap into 93 NA legacy with Rob tune wiring

Post by turbo wagon » Wed Feb 19, 2014 7:44 am

Yes on the wiring diagrams for the ej22 NA motor it has the cam shield entering the ecu at B58.6 and on the ej20g there is no connection at that pinout.
93 legacy wagon 5speed -Ej22t swap
92 SVX
86 vanagon with an SVX swap
01 outback the lactation-station-wagon

turbo wagon
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Re: Ej22t swap into 93 NA legacy with Rob tune wiring

Post by turbo wagon » Wed Feb 19, 2014 5:46 pm

93 legacy wagon 5speed -Ej22t swap
92 SVX
86 vanagon with an SVX swap
01 outback the lactation-station-wagon

turbo wagon
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Posts: 84
Joined: Wed Jan 09, 2013 11:35 pm
Location: Olympia, Wa

Re: Ej22t swap into 93 NA legacy with Rob tune wiring

Post by turbo wagon » Wed Feb 19, 2014 5:55 pm

My bad I was looking on the sti ecu v2 about the cam shield. Thanks guys.
93 legacy wagon 5speed -Ej22t swap
92 SVX
86 vanagon with an SVX swap
01 outback the lactation-station-wagon

Legacy777
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Re: Ej22t swap into 93 NA legacy with Rob tune wiring

Post by Legacy777 » Mon Feb 24, 2014 12:11 am

Ok, good deal.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm

MikeyMeyagi
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Re: Ej22t swap into 93 NA legacy with Rob tune wiring

Post by MikeyMeyagi » Mon Feb 24, 2014 4:31 am

if you want to clean things up under the hood you can put the map sensor and pressure exchange solinoid under the dash near the ecu. if you are gonna use a manual boost controller you can leave the BCS out of the equation, the car i just did didnt throw a CEL when i left it out. if it did come on, a resistor should take care of it.
94 Supra Turbo 6 speed. build in progress
98 Lexus GS300, single turbo 2JZGTE swap. daily driver
93 Impreza wagon, home brewed n/a-t ken block themed winter drift missle

*sold*
94 Alpine Sport Wagon... STi conversion, rotated turbo etc

nortonjefferson
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Re: Ej22t swap into 93 NA legacy with Rob tune wiring

Post by nortonjefferson » Tue Sep 04, 2018 8:15 pm

Bump from the dead. Didn't wanna start a new thread to avoid cluttering the forum. Can anyone shed any light on which color of wire should be sent to the ecu on the wastegate and pes? Obviously one needs a switched power source and the other wire goes to the ecu but I'm curious if anyone knows which color of wire goes where? Going from NA to ej22t with a robtune and have been searching for these answers for a while now to no avail. Thanks for any help you can provide.
White 1993 L Wagon AWD 5MT-Suspension upgrades Daily/Backroads Slayer 361xxx miles
White 1991 L sedan AWD 5MT-(Robtune 550 DOHC Ej22t swap coming together) 187xxx miles
Black 2005 LGT 5MT-Ej20x swapped daily running uel/vf40 setup for now..

Legacy777
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Re: Ej22t swap into 93 NA legacy with Rob tune wiring

Post by Legacy777 » Wed Sep 05, 2018 5:23 pm

Are you looking for the stock wiring color?

The switched power wire is yellow with a red stripe for both.
For the PES the wire going to the ECU is green with a yellow stripe.
For the wastegate solenoid the wire going to the ECU is Black with a white stripe.

This information is in the wiring diagrams (page 302 of 336) of the 92 engine & wiring service manual on my server. Page 281 of 336 has the wire color code table.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm

wtdash
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Re: Ej22t swap into 93 NA legacy with Rob tune wiring

Post by wtdash » Wed Sep 19, 2018 9:11 pm

What am I missing about the wire color? Is there a reason other than 'OEM'?

I did this swap years back (thanks to this site - and Josh!). I bought a 6-foot section of bulk wire harness from Home Depot that had 6 individual wires in it (had to make two runs, IIRC). Ran those for the turbo's 3 sensors on the passenger's strut tower to the ECU.

Although not part of the stock loom, they worked as intended for the Stock EJ22T ECU>>Revtronix>>RobTune upgrades I did.

Just curious.
Turbo Subies:
'87 GL-10 Turbo 4WD Wagon (pre-Loyale) - SOLD
'90 BJ, EJ22T/DOHC and 5-speed swap - SOLD
'04 FXT, Forged internals, VF39, STI TMIC, Cobb AP- SOLD
'93 Legacy SS - 5-speed, SOLD :-(
'02 WRX GG-SOLD
'96 BD - turbo'd-SOLD

Legacy777
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Re: Ej22t swap into 93 NA legacy with Rob tune wiring

Post by Legacy777 » Tue Sep 25, 2018 5:49 pm

wtdash wrote:What am I missing about the wire color? Is there a reason other than 'OEM'?
Not sure I understand the question?
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm

wtdash
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Re: Ej22t swap into 93 NA legacy with Rob tune wiring

Post by wtdash » Tue Sep 25, 2018 6:34 pm

Hi Josh,
Why does the wire's COLOR matter?
Turbo Subies:
'87 GL-10 Turbo 4WD Wagon (pre-Loyale) - SOLD
'90 BJ, EJ22T/DOHC and 5-speed swap - SOLD
'04 FXT, Forged internals, VF39, STI TMIC, Cobb AP- SOLD
'93 Legacy SS - 5-speed, SOLD :-(
'02 WRX GG-SOLD
'96 BD - turbo'd-SOLD

Legacy777
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Re: Ej22t swap into 93 NA legacy with Rob tune wiring

Post by Legacy777 » Wed Sep 26, 2018 5:56 pm

It doesn't unless you have OEM wire colors in the car or are trying to maintain the OEM wire color scheme.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm

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