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Old 01-11-2011, 12:16 PM   #1
gloyale
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Default 8 un-identified wires on 02 WRX ECU?

So I am prepping a harness to install an 02 WRX engine in an 87 RX.

I have I.D.'d all the wires shown on the USDM diagrams. Seems like everything needed to run the engine.

However this harness is a bit wierd. When I got it for the strip, there where these 8 wires seperated from the rest of the loom, poked though a little hole made in the firewall grommet. No connectors on the end. All 8 wires go to the ECU on the smallest of the 5 connectors (E on the charts)

Could this be a JDM ECU? Perhaps these wires are for a Variable Valve timing engine?

If anyone could tell me what these wires are for I would be greatly happy.
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Old 01-28-2011, 12:02 PM   #2
gloyale
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Wow....

Nobody? All these people with all this WRX/STI knowledge and NOBODY knows about 8 wires added to the ECU connector "E" on an 02 WRX harness? What would they be for? Is there any known trick, or reason to add wires to an ECU?

They are DEFINATELY not original to the harness.......not wrapped in the tap with it, just ziptied to the outside nad poked through a slot in the firewall grommet. 4 of them where one length, and 4 where longer, leading me to think they went to 2 devices....one on each side of the engine? Like Variable Valve timing controls? IDK?

Here's some pics.





This is why I preffer USMB. People actually respond to questions. Maybe without an answer, but at least a response.
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Old 01-28-2011, 05:34 PM   #3
AKGC8
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Quote:
Originally Posted by gloyale View Post
This is why I preffer USMB. People actually respond to questions. Maybe without an answer, but at least a response.
Ugh, I should just let this thread die after a post like that and let the USMB try to figure it out.

No offense, but your first post was pretty much useless. There are 8 wires coming off connector E but outside the factory harness is basically all you said. There are some smart people here on wiring, but nobody here is good enough to figure out wtf you're talking about without specific information.

Where did you get the engine and what did they tell you it was(02 wrx, usdm/jdm)? The information off the ECU or a picture of it could help identify it. Are the wires spliced into factory wires on connector E, if so which wires? If not spliced, what pins on the connector do they go to?
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Old 01-31-2011, 03:03 PM   #4
02 Scoob-TN
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I think you may have guessed right, those do look just like the wires I pulled out of my JDM Harness to add to my USDM harness for the AVCS. You probably got a harness from someone who had done a jdm swap..
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Old 02-02-2011, 12:04 PM   #5
gloyale
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Quote:
Originally Posted by Eby View Post

No offense, but your first post was pretty much useless. There are 8 wires coming off connector E but outside the factory harness is basically all you said.
I said there were 8 wires not shown in any USDM diagrahms. That is a pretty specific piece of information.

Quote:
Originally Posted by Eby View Post
There are some smart people here on wiring, but nobody here is good enough to figure out wtf you're talking about without specific information.
See the response from 02 Scoob-TN

"I think you may have guessed right, those do look just like the wires I pulled out of my JDM Harness to add to my USDM harness for the AVCS. You probably got a harness from someone who had done a jdm swap.. "

Apparently Eby, you underestimated your Nasioc Brethren.

Quote:
Originally Posted by Eby View Post
Where did you get the engine and what did they tell you it was(02 wrx, usdm/jdm)? The information off the ECU or a picture of it could help identify it. Are the wires spliced into factory wires on connector E, if so which wires? If not spliced, what pins on the connector do they go to?

I find this kinda funny because you DID respond after I posted pics. So, pics DO getr responses, however not all of them are constructive.

I don't have the engine. Harness was shipped to me as a USDM 02 WRX harness to be stripped down for a swap into an 87 RX.

Quote:
Originally Posted by 02 Scoob-TN
I think you may have guessed right, those do look just like the wires I pulled out of my JDM Harness to add to my USDM harness for the AVCS. You probably got a harness from someone who had done a jdm swap..
This is excactly the type of info I hoped for.

I knew that this type of mod had to have some precident and history.

Thanks
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Old 02-02-2011, 01:59 PM   #6
Zephyr
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Those eight wires are for the AVCS control, the car that this harness came out of had to have had a JDM V7 or V8 engine in it at some point. This may cause an issue for you if you are running an engine that still has TGV's on it. Check the black plug that goes into the engine harness. If all four rows are occupied you may be OK, if not you are going to need to do some repinning.
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Old 02-02-2011, 02:36 PM   #7
gloyale
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Thanks to all of Nasioc. It's great that you are here.

Didn't mean to be talking trash.....too much

I'll update this post with a link to the build thread of the car if the owner approves.....likely he's a member here too.... 2K4Sti?

I'm sure he will be happy to read this thread and know what those wires are for.
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Old 02-02-2011, 04:20 PM   #8
gloyale
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Quote:
Originally Posted by Zephyr View Post
Those eight wires are for the AVCS control, the car that this harness came out of had to have had a JDM V7 or V8 engine in it at some point. This may cause an issue for you if you are running an engine that still has TGV's on it. Check the black plug that goes into the engine harness. If all four rows are occupied you may be OK, if not you are going to need to do some repinning.
The forward section of the harness, from the SMJ to the the 2 main engine connectors was actually from a different car even, still an USDM 02 wrx. It matched wire for wire with the 11 page ECU diagrahms.

Every wire shown on the USDM diagrahms is there. I set the Harness up to run a USDM engine as per stock wiring. I tucked the 8 wires to the side?

I believe the engine it will run is a USDM engine. I'm unsure of the ECU. I didn't take pics of it somehow So I don't have the ID #'s

Would the JDM ecu run a USDM engine though the USDM harness? With just these added AVCS wires bundled up or just cut off?
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Old 02-02-2011, 08:06 PM   #9
AKGC8
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Quote:
Originally Posted by gloyale View Post
I said there were 8 wires not shown in any USDM diagrahms. That is a pretty specific piece of information.



See the response from 02 Scoob-TN

"I think you may have guessed right, those do look just like the wires I pulled out of my JDM Harness to add to my USDM harness for the AVCS. You probably got a harness from someone who had done a jdm swap.. "

Apparently Eby, you underestimated your Nasioc Brethren.


I find this kinda funny because you DID respond after I posted pics. So, pics DO getr responses, however not all of them are constructive.
Says the guy who was whining about not getting any type of response from NASIOC.

Your useless first post makes sense now, all you've got is a harness and have no clue what engine and ECU you're wiring it for.
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Old 02-02-2011, 08:47 PM   #10
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Default

/thread

ppl shouldn't have even bothered answering the OP. He was a condescending asshat from the start and doesn't deserve the assistance of the good ppl of NASIOC.
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Old 02-02-2011, 09:05 PM   #11
gloyale
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2 very helpful and resourceful responses.

and 2 trolls. From either perspective

Seems to me not only was it a valid question that helpful members where able to answer, but I even had a correct guess about what wires where for in the first place.

EBY and WRX STI.l

Since you both seem to suggest this is a worthless thread, how about you UNSUBSCRIBE and NOT POST IN IT.
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Old 02-02-2011, 09:10 PM   #12
AKGC8
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Great, you know what the wires are, case closed.

Oh wait, unless you know what engine and ECU they are being used on you don't know what to do with them. Hence why I was asking all my questions in my first post.

Sorry for trying to help.
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Old 02-02-2011, 09:16 PM   #13
gloyale
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Quote:
Originally Posted by wrxsti.l View Post
ppl shouldn't have even bothered answering the OP. He was a condescending asshat from the start and
I can't believe I'm being flamed for a bump and some sarcasm. How could I be condescending by suggesting that there is a wealth of knowledge on NASIOC? I was just trying to say something more encouraging of a repsonse than "bumpity"

Quote:
Originally Posted by wrxsti.l View Post
doesn't deserve the assistance of the good ppl of NASIOC.
Not to worry. You have not represented assistance nor a good person.

NAuseaOIC would be a better name for what YOU seem to think the board should be.
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Old 02-02-2011, 09:25 PM   #14
gloyale
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Quote:
Originally Posted by Eby View Post

Oh wait, unless you know what engine and ECU they are being used on you don't know what to do with them. Hence why I was asking all my questions in my first post.
I already stated my on;y interest was in setting up the the harness to Standalone run a 02 USDM WRX. The harness is set up for that. With a USDM ECU it will run a USDM engine.

It is the owner of the car and the harness that provided and presented the harness as a USDM 02 WRX........however the obviously now solved wires that where added cause confusion. The harness is now a USDM standalone. It is his responsibility to install a USDM ECU. That is what I will assure it will run.



As for trying to help. Please. We can all read.

Have you ANY experience in swaps? If not WHY are you posting and how could you be helping?

The people who actually KNEW something relative to this thread were very helpful using just the supposedly "useless" info I provided.
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Old 02-02-2011, 09:49 PM   #15
AKGC8
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You are still asking questions so you apparently haven't received all your answers.

If the owner told you to make it for a USDM engine and USDM ECU then cut the 8 wires off and be done with it. This is basic stuff, hope you're not being paid for your service.
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Old 02-02-2011, 10:12 PM   #16
gloyale
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Quote:
Originally Posted by Eby View Post
If the owner told you to make it for a USDM engine and USDM ECU then cut the 8 wires off and be done with it.
This is basically what I did, but rather than cut them entirely I just bundled them to the side. Then If he wants to get an JDM engine later he's got the wires in the connectors already. At this point I'm just following up for curiousity.

I've stripped many harnesses for swaps, succesfully. This one was in fact a weird one. After all, YOU didn't know the answers.

How many swaps have you done?
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Old 02-02-2011, 10:24 PM   #17
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Four, the first an 02 WRX to GC back in December 2002 when pretty much the only people doing swaps were businesses.

Last edited by AKGC8; 02-02-2011 at 10:33 PM.
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Old 02-03-2011, 06:47 PM   #18
gloyale
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Quote:
Originally Posted by Eby View Post
Four, the first an 02 WRX to GC back in December 2002 when pretty much the only people doing swaps were businesses.
I've done 4 this year.

3 last year.

This was the first time I ran into hacked in JDM weirdness. Forgive me for asking questions.

I thought that's why this community existed.
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Old 02-03-2011, 07:09 PM   #19
AKGC8
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It was just your attitude in your second and third posts. I was kind of being a dick in my first post because of your USMB comment, but I was asking legitimate questions to try and help out. Your first and second post did not make it clear what engine and ECU the wiring was going to be used on which would determine what you'd have to do with the wiring.
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