3sgte swap, ECU Question Options

[115celi]

Basically, I am middle of a 2nd gen 3sgte swap and my wiring is setup for a 90-91 ecu (pinout from DR Tweak). It cranks but there is no spark. We have checked the igniter, coil, distributor and wires using the BGB from celicatech, and they all check out.

I went to google to see if I could find any info and ran across a web-site with some ecu part numbers. http://www.toysport.com/webpages/WebUpdate...A20ECU20WEB.htm
I found an ecu that had 89661-20760 for the part number and was wondering if there is a difference between this one and the 89661-20750?

I thought mine was right, I thought the part number on the ecu was 89661-20750 but part of the 5 is missing and it isn't really legible. I figured it was right based on the part numbers listed in a thread I found.
JDM 185 ecu's-
89661-20750=89/10-90/03(superceded to 20751)
89661-20751=90/03-91/08
89661-2b310=91/08-92/02
89661-2b280=91/08-93/09

Does anyone know if there is any difference between the ecus with 89661-20760 and 89661-20750, thanks.

[115celi]

after a little more searching i found this site and i guess that the only difference is one is usdm(60) and the other jdm(50).

http://www.ts-ogn.no/files/3sgte-ecu-pinout.htm

usdm has cold start and egr on 26 pin, and doesn't have act or cco on 22 pin.

Any ideas why i wouldn't be getting spark, I did the trouble shoot in the bgb from celicatech.com and everything tested out. i'll keep seaching.

I am glad to have this site as a recource otherwise i'd be completely screwed!

[Coomer]

Have you pulled off the ECU cover (should just be a few screws) and seen if there are pinouts printed on the circuit board where the harness plugs plug in?

I know AE101 ECUs have the pinouts printed there...AE111 ECUs don't, and I have no idea about ST185 ECUs.

[Gary]

ST185 ecu has pinouts printed on the circuit board.
Remove the cover and compare the pinouts with the one in BGB.

This post has been edited by Gary: Feb 11, 2007 - 10:45 PM

[115celi]

ST185 ecu has pinouts printed on the circuit board.
Remove the cover and compare the pinouts with the one in BGB.

What if there is no pinout on the curcuit board? I checked for this before and I am sure it wasn't there but I'll double check.
DR_Tweak gave me the right pinout for the JDM st185(which I'm sure is what the ecu is out of because we had the whole front clip), and that is how it is wired.

[Gary]

ST185 ecu has pinouts printed on the circuit board.
Remove the cover and compare the pinouts with the one in BGB.

What if there is no pinout on the curcuit board? I checked for this before and I am sure it wasn't there but I'll double check.
DR_Tweak gave me the right pinout for the JDM st185(which I'm sure is what the ecu is out of because we had the whole front clip), and that is how it is wired.

It is there.
If you have 2 boards, you'll need to remove the top one first.

[toyotacrazy]

Basically, I am middle of a 2nd gen 3sgte swap and my wiring is setup for a 90-91 ecu (pinout from DR Tweak). It cranks but there is no spark. We have checked the igniter, coil, distributor and wires using the BGB from celicatech, and they all check out.

I went to google to see if I could find any info and ran across a web-site with some ecu part numbers. http://www.toysport.com/webpages/WebUpdate...A20ECU20WEB.htm
I found an ecu that had 89661-20760 for the part number and was wondering if there is a difference between this one and the 89661-20750?

I thought mine was right, I thought the part number on the ecu was 89661-20750 but part of the 5 is missing and it isn't really legible. I figured it was right based on the part numbers listed in a thread I found.
JDM 185 ecu's-
89661-20750=89/10-90/03(superceded to 20751)
89661-20751=90/03-91/08
89661-2b310=91/08-92/02
89661-2b280=91/08-93/09

Does anyone know if there is any difference between the ecus with 89661-20760 and 89661-20750, thanks.

This sounds all too familiar. I went through the same thing a few months back. Turns out the ecm that came with my swap was for the wrong year. If you need a new ecm, Ive got one for sale. 89661-2B280 Let me know if you need any help. This might help you

celica wont start

[115celi]

ST185 ecu has pinouts printed on the circuit board.
Remove the cover and compare the pinouts with the one in BGB.

What if there is no pinout on the curcuit board? I checked for this before and I am sure it wasn't there but I'll double check.
DR_Tweak gave me the right pinout for the JDM st185(which I'm sure is what the ecu is out of because we had the whole front clip), and that is how it is wired.

It is there.
If you have 2 boards, you'll need to remove the top one first.

i only have one board and no pinout on my ecu.

Basically, I am middle of a 2nd gen 3sgte swap and my wiring is setup for a 90-91 ecu (pinout from DR Tweak). It cranks but there is no spark. We have checked the igniter, coil, distributor and wires using the BGB from celicatech, and they all check out.

I went to google to see if I could find any info and ran across a web-site with some ecu part numbers. http://www.toysport.com/webpages/WebUpdate...A20ECU20WEB.htm
I found an ecu that had 89661-20760 for the part number and was wondering if there is a difference between this one and the 89661-20750?

I thought mine was right, I thought the part number on the ecu was 89661-20750 but part of the 5 is missing and it isn't really legible. I figured it was right based on the part numbers listed in a thread I found.
JDM 185 ecu's-
89661-20750=89/10-90/03(superceded to 20751)
89661-20751=90/03-91/08
89661-2b310=91/08-92/02
89661-2b280=91/08-93/09

Does anyone know if there is any difference between the ecus with 89661-20760 and 89661-20750, thanks.

This sounds all too familiar. I went through the same thing a few months back. Turns out the ecm that came with my swap was for the wrong year. If you need a new ecm, Ive got one for sale. 89661-2B280 Let me know if you need any help. This might help you

celica wont start

thanks, but i am going to try to find 89661-20750 or 89661-20751 first, otherwise i would need to repin some things. i'll keep it in mind tho.

[WannabeGT4]

You have a 90-91 ECU so if the doc did everything right the wiring should work fine with that ECU wether it's USDM or JDM... You'll just get an EGR code if it's a USDM ECU.

Most if not all 90-91 ECUs don't have the silk screening on the board. The 92-93 ECUs do and they also have the second circuit board.

Have you checked your fuses? Have you tested your coil and are you using the right spark plug wires for the 90-91 3SGTE? Are you getting fuel? What's the part number for your igniter? Have you contacted Dr_Tweak?

[Dr_Tweak]

Did I wire up this harness?

[WannabeGT4]

Did I wire up this harness?

LOL. Oops. I thought you did. I guess you just gave him the ECU pinout.

In that case talk to whoever did your harness. Don't bother Doc Tweak, he's a busy man.

[Dr_Tweak]

LOL I don't know, I think I just gave him the pinouts but I get so many emails, PMs, and harnesses sent to me that I loose track from time to time

-Doc

[toyotacrazy]

any updates?

[x_itchy_b_x]

i have a 93 jdm 3s and its ecu only has one board and no silk screen pin lables.
but heres some good pinouts.

http://mr2oc.com/showthread.php?t=157628

[CilverSeliST205]

If it turns out that you have a good ecu and wiring, check your igniter's ground connection (igniters bracket) and make sure that it gets good ground - mine had a thin layer of rustage and that made my car crank over with no spark

[brianforster]

also check EFI fuse in the engine bay

[zipstrips]

also check EFI fuse in the engine bay

damn that fuse!...

checkk the ST fuse under your dash too!!!!!!!!!!!!!1

[115celi]

If it turns out that you have a good ecu and wiring, check your igniter's ground connection (igniters bracket) and make sure that it gets good ground - mine had a thin layer of rustage and that made my car crank over with no spark

Thanks, this fixed my spark issue, but it still won't start.

I am getting codes 22,24,31,32,41 and 51. I am going to trouble shoot those sensors tomorrow before work.
Anyone have any ideas? Thanks alot for all the help.

[lagos]

it sounds like you forgot to hook up your afm, water temp sensor, throttle position and speed sensor. you did get an afm with your motor, right?

[toyotacrazy]

If it turns out that you have a good ecu and wiring, check your igniter's ground connection (igniters bracket) and make sure that it gets good ground - mine had a thin layer of rustage and that made my car crank over with no spark

Thanks, this fixed my spark issue, but it still won't start.

I am getting codes 22,24,31,32,41 and 51. I am going to trouble shoot those sensors tomorrow before work.
Anyone have any ideas? Thanks alot for all the help.

Do you have the correct ecm for the engine? And was it wired using the correct wiring diagram?

JDM 185 ecu's-
89661-20750=89/10-90/03(superceeded to 20751)
89661-20751=90/03-91/08
89661-2b310=91/08-92/02
89661-2b280=91/08-93/09