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Go Back   SR20 Forum > Main Forums > SR20VE / SR16VE



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Old 05-20-2002, 07:54 PM   #1 (permalink)
Ben
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Refresh my memory- why won't a VE ECU work?

I know the VE cars had a CVT tranny, but the normal ECU doesn't have anything to do with the operation of the tranny, does it? The only "hacking" you'd have to do would be to add the two wires for the VVL solenoids, I think? I thought there was a reason a VE ECU wouldn't work, but I can't think of what that was...
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Old 05-20-2002, 08:04 PM   #2 (permalink)
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You would have to use the VE wiring harness because the ECU connector and pin configuration is completely different. If you use the VE harness you also have to rewire the dash, etc.

Jason Garett Young has an SR16VE and he is going to try going this route to see if it works.

Hard way to go if you ask me.
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Old 05-22-2002, 01:36 AM   #3 (permalink)
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Ok, so why couldn't you build an adapter harness? Keep the DE engine/dash harness, VE computer and run the extra wires to the engine bay?
I assume Nissan hasn't changed their wire colors too much.
It might take time, but It would be a lot cheaper than a JWT ecu right?

Forgive me if this has been answered. I looked around on the old posts and did not see anything.

Thanks
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Old 05-22-2002, 01:49 AM   #4 (permalink)
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Wow quite an undertaking. It certainly could be done, but nobody has a VE service manual or wiring diagrams and there are indeed some different wires.

For example I was looking for the tach wire for the VVL solenoids and at one point I thought it was green (it's blue in a B14). There are 4 wires in a B14 that are green with the exact same stripe but they do different things in different places in the car.

Another pitfall would be ruining two perfectly good harnesses if you couldn't get it to work.

I get a headache just thinking about it.
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Old 05-22-2002, 12:36 PM   #5 (permalink)
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I dont understand because the Apexi website list the the Sr20ve as having the same pinouts as the 91-99 ecu's. If its anything like the Honda's, there is still pinouts in the ecu connector for the extra 3 wires which have to be run. http://www.apexi-usa.com/productdocu..._safc_wire.pdf That is the site but you have to goto page 17. Look closely and you can even see the S15 VET having the same N3-a plug as the 97+ Sr20ve and the 91-99 ecu's which we use. I also checked my manual and there are about 7 open slots for where the extra wires could possibly be run. So theoretically its possible but never been done yet. Unless you put power to the ecu and use a test light on the open slots to see which one gets power and from then on work your way to making it work. Hope this is understandable.

Last edited by SucKit : 05-22-2002 at 12:44 PM.
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Old 05-22-2002, 02:11 PM   #6 (permalink)
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The top wiring harness is the DE ECU connector. The bottom is the VE ECU connector.

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Old 05-22-2002, 02:15 PM   #7 (permalink)
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Ok, so you have the VE harness? Great! Swap the harness and ECU and you are golden.
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Old 05-22-2002, 02:15 PM   #8 (permalink)
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Looks straightforward. I'll give it a shot...

Just kidding What a nightmare!
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Old 05-22-2002, 02:23 PM   #9 (permalink)
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Push really hard. I am sure it will snap right in.


--Eric
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Old 05-23-2002, 12:59 AM   #10 (permalink)
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http://www.sr20deforum.com/showthrea...pagenu mber=2 Please reread what bigtom says on the bottom of the page. It says that only the N1 harness is different from the sr16ve, sr20ve, sr20de which are the same for ob1. This confirms what the Apexi website says about it being N3-a and noting the N1 as having a special harness not listed I guess. That why I dont get how is your harness so different, I compared it and the only harness it looks similar too is n5-a/b and N6-a/b/c(page 19) . The only cars that use those are RB motors and VQ motors which my manual list, not in the website. That only leads me to think that you have a either a N1 harness or VQ/RB harness. Also I checked and N5-b is the only one that isnt listed for a specific harness or engine/car. Please note this is all from a manual translated from Japanese into English that Apexi supplies so if I have no basis please tell me.
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Old 05-23-2002, 02:55 AM   #11 (permalink)
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you have an obdII ecu with an obdI harness, or the other way around it wont work!!!
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Old 05-23-2002, 09:03 AM   #12 (permalink)
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Oh thats why, all you have to find is a 91-94 ecu which is obd1 and then find a switch to activate it all. I was confused as the bottom one looks exactly like my harness. Yours up top is obd2 thats why it wont plug up. Sorry for the confusion.
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Old 05-23-2002, 09:09 AM   #13 (permalink)
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At least now it all makes sense
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