The Flow Goes This Way

I haven’t gotten much done to the Impreza over the last few weeks. I’ve been working on a class for my Masters. I also spent most of a week out of town for work, so that didn’t help. Plus the release of TitanFall2 … too much fun and not enough time!

What I’ve been trying to figure out lately is how to get the wiring harness into the Impreza. There have been a few stumbling blocks. I was given some wiring diagrams for the Impreza which were okay, but they were B/W and hard to read. It was VERY hard to tell what the layout of the ECU connector was and the labeling of the wire colors was terrible. Luckily a guy on Stack Exchange provided me with some color ones, which are awesome. Here’s what they look like:


Looking at the two images, the right side of the top one connects to the left side of the bottom one. The ECU plug shown in the diagram actually looks like this when disconnected:


It’s actually upside down. Pin #1 is on the lower right side of the connector and runs across to pin #16, then continues down from there. I’ve found most of what I need to cull out of this to plug into the SVX ECU to make it work. We’ll see how it goes. I’m going to clip the wires I need off of the back of wiring harness (probably leave a pigtail) to connect. I’ll blog about it as I’m hoping to get the car started this weekend.

One of the other things I needed was a diode to fool the ECU into believing the “automatic” transmission is in park. Since the transmission in the Impreza is a standard shift, you have to include the diode in the mix so it will think it’s in either park or neutral. Without it, it thinks the transmission is in gear and that’s all she wrote … no cranking will occur. I was wondering what size of diode I’d need and where I’d be able to find one. Luckily, keeping the old wiring harness pays off. There just happens to be a pair of them already in the harness which you can use for this purpose. Here’s what they look like:


I’m still unsure of how they go into what I’m doing. Not sure of the direction alignment. Not sure of a lot of things, but ultimately I’ll get it figured out.

Like I said, I’m hoping to get it started this weekend. I’ll blog about my endeavours later most likely :o)

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