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

[lagos]

Don't take it the wrong way Lagos, we're cool. I don't know what you do for work, but just imagine for a minute that you work a commission-only job, you have just about sealed a good "sale", and then the buyer calls you up and says that someone talked them out of it. (Brian Forster comes to mind).

I worked commission only job for about 5yrs. So i know all about that.
As for Brian, I actually walked Brian (and dozens of other swappers) through doing his swap from start to finish, over the phone, email, pm and AIM. Ive yet to get the commission check for those jobs.

Back on topic.... make a 2nd gen to 3rd gen conversion harenss. You'll make a killing on them with the mr2 guys. I expect 10% off each sale for the idea


WannabeGT4, you should start a new thread with info on where to get different harness plugs from. Not to take business away from anyone, but to provide a place, other then the junk yard, to source harness plugs from. There have been a few times that i had to replaced a damaged plug, but never found a place where i can just buy them new.

This post has been edited by lagos: Jan 2, 2008 - 5:47 PM

[WannabeGT4]

WannabeGT4, you should start a new thread with info on where to get different harness plugs from. Not to take business away from anyone, but to provide a place, other then the junk yard, to source harness plugs from. There have been a few times that i had to replaced a damaged plug, but never found a place where i can just buy them new.

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.

This post has been edited by WannabeGT4: Jan 2, 2008 - 5:52 PM