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Old 02-26-2009, 03:15 PM   #1
turboL
Scooby Specialist
 
Member#: 111735
Join Date: Apr 2006
Chapter/Region: South East
Location: Philly for now
Vehicle:
96 Legacy2.0GTSOLD
Bimmer Tech

Default 2003 EJ20 Swap into 96 Legacy GT 4EAT

Couldn't find much info on this so figured id post what I am doing.



This is the wiring guide for the TCU wires only.

1.
B84(80)(Pink)---> WRX B20(Brown w/ Red tracer)

2.
B84(79)(Blue)---> WRX A19(Red w/ Yellow tracer)/WRX A18(Pink w/ green tracer). Note: this is the torque control signal, the 96 TCU has one input for this, the 03 TCU has two inputs for this. But the signal itself is 5v KOEO and KOER so unless the currents are much different I think merging these together should work.

3.
B84(47)(Green w/ Orange tracer)---> WRX B28(Green w/ White tracer). Note: On the 96 TCU this is designated MAF sensor signal for AT, on the 03 TCU this is designated AT Load signal. The expected voltage KOEO for the 96 TCU is 0v-.3v. The expected voltage KOEO for the 03 TCU is 4.3v-4.4v. This may cause an issue. However, the KOER voltages expected are much closer. The 96 TCU expects .8v-1.2v and the 03 TCU expects .9v-1.4v. I don't think there will be a driveability issue, but maybe a CEL due to the KOEO voltages.

4.
B84(64)(Black w/ Blue tracer)---> WRX C9(Green)
This is the engine speed input for the TCU. Should be no issues here.

5.
B84(6)(White w/ Black tracer)---> WRX B7(Light green)
This wire is the TPS signal wire, B84(6) needs to be spliced into WRX(B7)

6.
B84(21)(Red)--->WRX B9(Sb)
This is the 5v ref signal. B84(21) needs to be spliced into WRX(B9)


Notes:

WRX C14(Yellow w/ Red Tracer) is the "Torque Control Cut signal". This input is not present on the 96 TCU.

I'll add more later.
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Last edited by turboL; 03-21-2009 at 07:36 AM.
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Old 02-27-2009, 12:19 AM   #2
turboL
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Member#: 111735
Join Date: Apr 2006
Chapter/Region: South East
Location: Philly for now
Vehicle:
96 Legacy2.0GTSOLD
Bimmer Tech

Default

First issue, I have a 5mt harness...none of these WRX pins are there. ACK!

Last edited by turboL; 02-27-2009 at 01:35 AM.
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