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VWRX.com - Volkswagen Vanagon powered by Subaru WRX STi Turbo engine

ECU Harness Fabrication

Starting with this mess:

Things are getting a bit more organized:

Now it's looking pretty simple:

Since the JDM WRX wiring is different than the newer OBDII USD WRX and OBDI USD 2.2, I had to carefully trace each wire from the ECU and confirm where it was going.

Here is a document of my findings: 95 JDM WRX STi V2 EJ20 Pinout Wiring Charts

Note: The "coil-on-plugs" on this engine are not the same as the USD WRX's. These coil packs are the same as the coil packs from a mid-nineties SVX engine. This also means that the SVX external igniter could be used as a replacement if ever needed.