Using a '93 3SGTE ECU on a '91 3SGTE Engine and Harness Options

[Dr_Tweak]

Some weeks back I had a customer doing a 3SGTE swap into a '91 Celica that I did a wiring conversion for. After he got it back and installed, I asked him for the part number on his ECU since I've seen many situations where the importers send the wrong ECU for the year of the harness. Sure enough, he had a '91 Harness but a '93 ECU. I advised him to get a '91 ECU, but he was having a hard time locating one.

About the same time, I started gathering parts and doing research for making jumper harnesses for various Toyota applications. I located the supplier for the female ECU plugs for a few different Toyota harnesses. When I got one in that matched the 3SGTE harnesses, I though, why not make a jumper harness that goes from a '91 harness to a '93 ECU, or a '93 harness to a '91 ECU? Then customers who run into this situation don't have to find another ECU or repin the whole harness.

Since I had this customer, Bryant, who had this very situation at hand, and since I happened to be going near where he lived on a recent road trip, I decided to whip up a prototype and give it a try.







There it is plugged into a 3SGE ECU as an example. This first one came out a little rough, the production model will be cleaner.

And here it is plugged into the car:



The jumper harness worked PERFECTLY. It fired up the first try and is running great, no codes and no problems at all

If anyone wants one of these jumper harnesses let me know, I'm currently building them to order.

Other applications for this setup include plug and play jumper harnesses for standalone units that don't already have a plug and play setup, like perhaps 3SGTE/Autronic, and so on.

-Doc

[Dr_Tweak]

I think I might do that.
BTW. I just got off the phone with the local toyota dealer and the main part numbers I listed were all available. I think I might stop in tonight to see if he can't tell me exactly which terminals I would need to go with them.

Yeah find out how much the terminals cost with a piece of wire crimped on them. They have them available. And you should definitely post up that PDF. I'll host it if you need a place.

Trust me Lagos, I have to empty my PM box almost every day from all the PMs I get asking questions about swaps. Just because my post count isn't as high as some of the people on here doesn't mean I'm not constantly contributing to this community. (Just a couple minutes ago: http://www.6gc.net/forums/index.php?showtopic=54764&hl=) Some people have the idea that I'm just trying to make money off 6GC and they neglect to recall that I was an enthusiast here long before I was a professional.

By the way, if you ever have any broken plugs and need a good one, just call me up, I have hundreds of them here in good shape.

-Doc

This post has been edited by Dr_Tweak: Jan 2, 2008 - 5:54 PM

[WannabeGT4]

I think I might do that.
BTW. I just got off the phone with the local toyota dealer and the main part numbers I listed were all available. I think I might stop in tonight to see if he can't tell me exactly which terminals I would need to go with them.

Yeah find out how much the terminals cost with a piece of wire crimped on them. They have them available. And you should definitely post up that PDF. I'll host it if you need a place.

Those terminals with wire were ridiculously overpriced. I accidentally laughed at the guy when he told me the price.

Anyway, this is the post I made with the PDFs for the connectors.
http://www.6gc.net/forums/index.php?showtopic=54817