ST165 to ST185 ECU Conversion
So is this the final shopping list? Anything else? UDSM or JDM ecu?
*female receptacle
174518-7 x1
*male plugs
174514-6 (16 pin) x1
174515-6 (22 pin) x1
174516-6 (26 pin) x1
*pins (large) 173631 x16
*pins (small) 173716 x48
*female receptacle
174518-7 x1
*male plugs
174514-6 (16 pin) x1
174515-6 (22 pin) x1
174516-6 (26 pin) x1
*pins (large) 173631 x16
*pins (small) 173716 x48
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[img]http://iamhenrychan.com/images/1655.jpg[/img]
UT2 (SCW) Chan - Oakland, CA
04 Duc Monster DS
90 All-Trac/ GT4RC :: hydra 2.17 :: 880 :: sb46 :: 205ic
400BHP @ 20#, low 12s
[url]http://www.cardomain.com/id/1BADGT4[/url]
UT2 (SCW) Chan - Oakland, CA
04 Duc Monster DS
90 All-Trac/ GT4RC :: hydra 2.17 :: 880 :: sb46 :: 205ic
400BHP @ 20#, low 12s
[url]http://www.cardomain.com/id/1BADGT4[/url]
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1BADGT4 - Club Member
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- Location: 510
<double posted>
Last edited by 1BADGT4 on Mon Oct 08, 2007 11:25 pm, edited 1 time in total.
[img]http://iamhenrychan.com/images/1655.jpg[/img]
UT2 (SCW) Chan - Oakland, CA
04 Duc Monster DS
90 All-Trac/ GT4RC :: hydra 2.17 :: 880 :: sb46 :: 205ic
400BHP @ 20#, low 12s
[url]http://www.cardomain.com/id/1BADGT4[/url]
UT2 (SCW) Chan - Oakland, CA
04 Duc Monster DS
90 All-Trac/ GT4RC :: hydra 2.17 :: 880 :: sb46 :: 205ic
400BHP @ 20#, low 12s
[url]http://www.cardomain.com/id/1BADGT4[/url]
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1BADGT4 - Club Member
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- Joined: Thu Aug 12, 2004 2:33 am
- Location: 510
so did anyone buy from onlinecomponents with their min order of $30? That means that you have a bunch of extras in hand. Let me know if you do and I will buy the needed parts from you. PM me as im really interested on how my car would work with the st185 ecu that the engine is originally designed to work on.
EDIT. Also for the pins, can anyone confirm the right part number for the 173631-? and 173716-?
EDIT. Also for the pins, can anyone confirm the right part number for the 173631-? and 173716-?
Patrick M.
st165

st165

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gpmarzan - Established Member
- Posts: 1537
- Joined: Mon Sep 06, 2004 9:28 pm
- Location: Greenwood, IN
id really like to get a 185 ecu in my car also. im pretty desprate to have it done. someone is going to make some cash!
88 st 165/w 185 swap sold :(
88 st165 revival in progress sold :(
93 mkiv supra NA-T (601whp at 19psi on e85) 1000hp goal build in progress
97 dodge 1/2 ton lifted and beaten to death daily.
13 dodge dart (not as fruity as a prius)
88 st165 revival in progress sold :(
93 mkiv supra NA-T (601whp at 19psi on e85) 1000hp goal build in progress
97 dodge 1/2 ton lifted and beaten to death daily.
13 dodge dart (not as fruity as a prius)
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xaftermath801x - Club Member
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- Location: slc, utah
im also looking to do this so i can run an ats rom tune.... but if this doesnt work out then 

Red st165 - Garage Queen turned wannabe track rat
White st165 - slapping back together and hoping for the best
Black st165 - gone
2011 FA5 - Family Truckster
White st165 - slapping back together and hoping for the best
Black st165 - gone
2011 FA5 - Family Truckster
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88st165 - Established Member
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ok guys, i am ready to purchase the necessary connectors from onlinecomponents. Anyone with me in purchasing these to get to their minimum order of $30? You can paypal me half of it and I will ship you your set free of charge when it gets here. How about it?
Patrick M.
st165

st165

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gpmarzan - Established Member
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- Location: Greenwood, IN
Re: ST165 to ST185 ECU Conversion
[/quote]All4Traction wrote::D![]()
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Well, I wired up my 185 ecu to my 165 harness and it started up in -10deg. celcius!
I have to wire the IC pump constant and then take it for a test drive tomorrow.
Here's a pic of the adapter harness i made so I didnt have to hard wire everything up in -20 to -35 deg. Celcius weather. Also it allowed me to switch back to my 165 ecu if it didnt work.
You didn't by any chance document the changes you made to the pin-outs, did you?
- aubeone
- Club Member
- Posts: 476
- Joined: Mon Jul 28, 2008 2:07 pm
- Location: Little Britain, ON
Hi, i'm cedric from perth, australia.
I ve got a st165 jdm with a st185 jdm engine. but was still running with the st165 ecu and loom.
I needed to swap to the st185 ecu because 1987 st165 jdm doesn't have fuel cut based on pressure from the PIM. It's measured with the air flow. So i cannot boost more than 10 psi.
I plugged everything. The car start, but the air fuel ratio is lean, and there is black coming out of the exhaust when i accelerate. I didn't test drive, just idle. Code error 32 ( open circuit on E2 or short between vc and vs.)
Could you tell me how did you do to plug FC and OX2 ?
Could it be because there s nothing plugged in PIM?
Thank you very much for your help, i 'm a bit stuck...

I ve got a st165 jdm with a st185 jdm engine. but was still running with the st165 ecu and loom.
I needed to swap to the st185 ecu because 1987 st165 jdm doesn't have fuel cut based on pressure from the PIM. It's measured with the air flow. So i cannot boost more than 10 psi.
I plugged everything. The car start, but the air fuel ratio is lean, and there is black coming out of the exhaust when i accelerate. I didn't test drive, just idle. Code error 32 ( open circuit on E2 or short between vc and vs.)
Could you tell me how did you do to plug FC and OX2 ?
Could it be because there s nothing plugged in PIM?
Thank you very much for your help, i 'm a bit stuck...

CEIKA Demo car 1987 ST165 JDM 1000kg/700hp http://ceikaperformance.com
- MXP_57
- Club Member
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- Joined: Mon Sep 29, 2008 1:26 am
- Location: Auriol, FR
I have made an Excel Spreadsheet that converts the ECU side of the harness and the Engine side of the harness from the 1st Gen 3SGTE to the 2nd Gen and provides wire colour-to-wire colour equivilants.
I've been working on it for a year now, and have been fortunate to have a Toyota dealership's resources at my disposal.
I am unsure of how to post it, so if anyone wants a copy, shoot me an email and I'll fire it off to you promptly.
Evan.
I've been working on it for a year now, and have been fortunate to have a Toyota dealership's resources at my disposal.
I am unsure of how to post it, so if anyone wants a copy, shoot me an email and I'll fire it off to you promptly.
Evan.
- aubeone
- Club Member
- Posts: 476
- Joined: Mon Jul 28, 2008 2:07 pm
- Location: Little Britain, ON
I am most of the way done my harness adapter, but wanted to check with other who have already succuessfully completed this to make sure I'm on the right track.
I have used the female plug from a 162 ecu that wasn't every going to see the light of day again, and picked up the male plugs from Dany. I moved the required pins (finally realized after about 30 minutes of trying to work the first pin free that there's a release on the plug...) and am well on my way to making a much less visually appealing version of the picture above.
Here's my question: This adapter is to get the engine to run on it's own computer, utilizing the 165 harness already run throughout the car right? Will the 165 harness, already attached to the lights, doors, etc. continue to work those items?
I guess what it mentally tripping me up is the idea that the 185 has a seperate harness for the inside of the car.
Also, I have been using the online BGB from CelicaTech for the 185...does anyone know if the pin-outs are different for the jdm 185 than the usdm 185?
I have used the female plug from a 162 ecu that wasn't every going to see the light of day again, and picked up the male plugs from Dany. I moved the required pins (finally realized after about 30 minutes of trying to work the first pin free that there's a release on the plug...) and am well on my way to making a much less visually appealing version of the picture above.
Here's my question: This adapter is to get the engine to run on it's own computer, utilizing the 165 harness already run throughout the car right? Will the 165 harness, already attached to the lights, doors, etc. continue to work those items?
I guess what it mentally tripping me up is the idea that the 185 has a seperate harness for the inside of the car.
Also, I have been using the online BGB from CelicaTech for the 185...does anyone know if the pin-outs are different for the jdm 185 than the usdm 185?
- aubeone
- Club Member
- Posts: 476
- Joined: Mon Jul 28, 2008 2:07 pm
- Location: Little Britain, ON
a/c works with adaptor??
Just one more question did the a/c end up working ??? I read that u were not sure and my car has a/c so im curious?? thanks robusk
- robusk
- Club Member
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- Location: hamilton, ontario, canadaw
polarmoment wrote:female receptacle is amp/tyco part # 174518-7
the male plugs are part #'s 174514-6 (16 pin), 174515-6 (22 pin), and 174516-6 (26 pin), with contacts being part #'s 173631 (large) and 173716 (small). you'll need 16 of the larger and 48 of the smaller ones.
I shouldve done my research some more. The female receptacle part # listed above is for an st185. I received my order today and playing around with it, i was able to hook up the female recept with the male plugs which I automatically said "damnit." I think the part # for the st165 female recept is 172319-7.
Patrick M.
st165

st165

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gpmarzan - Established Member
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- Joined: Mon Sep 06, 2004 9:28 pm
- Location: Greenwood, IN
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