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92vert240
Offline
342 posts
S13 hatch S14SR20 stock record-12.35 at 110, 87 t-type 10.69 at 132. hatch daily.
Mount sinai ny
3-10-2005
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (pauliedrft) | 8:44 PM 11/12/2008 |
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I have a question on the Power plugs. They are the plugs right by the fuse box on the front right engine bay correct? About 4 or 5 of them? If so, this is not part of the ECU harness on the S13. How am i supposed to de-loom thoes plugs back to the ECU? Take the whole car apar? Im lost here.
1990 hatch w/ s14 SR20DET stock w/ FMIC, 3" Exhaust. 12.35 at 110 ?Record?
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (92vert240) | 9:47 PM 11/12/2008 |
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The stock S13 engine wiring harness plugs into the power connections at the fender, the rest of it goes into the cabin through the firewall to the ecu or to the motor. Unplug those 2 plugs, they are grey and brown then trace them back, they will end up going down and around the shock tower then back up to the firewall to the ecu in the car. This is what I was talking about when I said deloom the harness and cut it by the ecu plug.Edit: Here is a pic to help.
Modified by mestizo at 12:42 AM 11/13/2008
Links to my cars below:
92 Acura NSX
92 Nissan 240SX SE Coupe
95 Nissan 240SX Daily Driver
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92vert240
Offline
342 posts
S13 hatch S14SR20 stock record-12.35 at 110, 87 t-type 10.69 at 132. hatch daily.
Mount sinai ny
3-10-2005
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 9:14 AM 11/13/2008 |
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Ok yes i just had a look at a s13 harness out of the car. I was mistaken. Thanks alot. I will be back here for the pinout instructions im sure!! Thanks again. Tyler.
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Whitesol
Offline
2 posts
Calgary AB
11-17-2008
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (92vert240) | 8:34 PM 11/18/2008 |
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I wasn't able to find any info on wiring differences in the Zenki to Kouki pinouts, so I assume the body connector is the same. Perhaps there is an extra splice somewhere on certain harnesses?At any rate, I would just like to add that you must wire ECU Pin 45 to a switched 12v+ power supply (black red ~ Pin 40 on interior plug with mestizo's numbers). Without it, the ECU will not turn on, no spark , no fuel , no relays. I used the switched 12v+ for the ignitor relay. I spent the better part of an afternoon scratching my head trying to figure out why an ECU with power would not turn on.  Cheers,
-Scott
Modified by Whitesol at 9:48 PM 11/18/2008
Modified by Whitesol at 10:54 AM 11/19/2008
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (Whitesol) | 11:23 PM 11/18/2008 |
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ECU Pin 45 on my harness is interconnected to the power relays from Nissan, there was no change in this wiring cuz it was not necessary on my harness.
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Whitesol
Offline
2 posts
Calgary AB
11-17-2008
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 11:59 PM 11/18/2008 |
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| Quote, originally posted by mestizo » | | ECU Pin 45 on my harness is interconnected to the power relays from Nissan, there was no change in this wiring cuz it was not necessary on my harness. |
I figured as much. It was just frustrating looking at the wiring knowing I had followed your write-up to the T and it not working. Great write-up BTW. 
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (Whitesol) | 10:39 AM 11/19/2008 |
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Thanks! Glad it helped out!
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92vert240
Offline
342 posts
S13 hatch S14SR20 stock record-12.35 at 110, 87 t-type 10.69 at 132. hatch daily.
Mount sinai ny
3-10-2005
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 1:47 PM 11/20/2008 |
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When splicing the power wires in, you are to splice into the existing wire from the PIN on the ECU plug called out in your diagram correct? And on the interior plug, cut and reconnect the ne plug correct? Thanks. I'll be doing this tonight.
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (92vert240) | 5:10 PM 11/20/2008 |
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Almost all the connections from the S13 harness are going to end up being spliced into the interior plug wires on the S14 SR harness. If you look at the pinouts I made they say "Pin # on the int. plug" meaning that the s13 wire goes to the wire that sits at that position on the S14 SR interior plug. Other wise it will say "Pin # on the ECU", etc, etc.
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92vert240
Offline
342 posts
S13 hatch S14SR20 stock record-12.35 at 110, 87 t-type 10.69 at 132. hatch daily.
Mount sinai ny
3-10-2005
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 7:10 PM 11/20/2008 |
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Ok. Im going to take a crack at it. How about what the guy above me was saying wih pin 45 on ECU nd pin 40 on interior plug? Is this somthing i should concern myself with? My engine is the first year s14's were made. whether that matters IDK.
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (92vert240) | 9:53 PM 11/20/2008 |
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Unless something was cut or changed on ur harness then my write up should work perfect and you won't need to worry about pin 45 on the ecu cuz it's already connected to the power relays from Nissan so all you need to do is follow my write up. Also the "Zenki" in the title means my write up is for the early or 1st generation of JDM S14 SR20DET motors.
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92vert240
Offline
342 posts
S13 hatch S14SR20 stock record-12.35 at 110, 87 t-type 10.69 at 132. hatch daily.
Mount sinai ny
3-10-2005
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 10:22 PM 11/20/2008 |
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Ok thanks. i have the s14 deloomed and all the wires numbered. Also have the KA harness deloomed. Ready to start soldering stuff together. Thanks alot for the help!!!
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (92vert240) | 11:03 PM 11/20/2008 |
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Yup glad I could help!
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92vert240
Offline
342 posts
S13 hatch S14SR20 stock record-12.35 at 110, 87 t-type 10.69 at 132. hatch daily.
Mount sinai ny
3-10-2005
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 10:24 AM 11/22/2008 |
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Well as my consistant bad luck continues let me add a few things here. The SOHC and DOHC plugs are NOT the same. Pinout is opposite for the SOHC and DOHC. I found this out by spending $100 on a DOHC KA harness since the write up was done on that (my car was a SOHC) . Got everything wired up and the interior plugs do not connect. I have a DOHC plug on s14 harness and a white interior plug on the car and they do not line up, in fact they are opposite. Fu*k Me once again. i can never do anything right. Had all my connections soldered, shrink wraped, and taped. Now its going to look like sh*t. AWESOME!!!!!!
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (92vert240) | 12:02 PM 11/22/2008 |
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If you read the original post I said that the DOHC and SOHC interior plugs are different. What I said was the same is the DOHC and SOHC power plugs. I used a SOHC harness in my swap cuz it was cheaper and easier to find than a DOHC harness, so I know for a fact those are the same. But as I stated the interior plugs are different but do the same job with mostly the same colors as well. I choose to keep the DOHC harness uncut for smog purposes later.However its really an easy fix. You can depin your Brown DOHC plug on the end of your newly made S14->S13 harness and then do the same for the sohc white plug from your original SOHC harness and switch the plugs. All you need is a small tip screw driver or pin to depin the connector's, then just slide them back in and youre done. Also you can start the car without the interior plug being hooked up, the only thing is it will not read any CEL codes or anything else for that matter on the cluster. It will also not add any extra feul at start up cuz there is no start signal going to the ecu. But it will crank and run. Just be careful not to run it for long without any instrumentation.
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92vert240
Offline
342 posts
S13 hatch S14SR20 stock record-12.35 at 110, 87 t-type 10.69 at 132. hatch daily.
Mount sinai ny
3-10-2005
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 12:34 PM 11/22/2008 |
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Im not in any way blaming you. W/o this post ide be up shi*s creek. I thought the only thing different was the color of the plugs. I dont have a SOHC harness. When i pulled the motor and everything out of this SR car, i put it all in another shell for my daily. I need to locate a SOHC interior WHITE plug so i can de-pin the plug and switch it. If you know anyone or have one please let me know. I have a post in the WTB section. Thanks again. I wish cars were like a deer, shoot at it and it runs. lol
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (92vert240) | 1:05 PM 11/22/2008 |
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No problem I just want to make sure that you understand the write up steps. I just went to the yard and found an already cut harness that had an interior plug, cut it off and spliced it in.
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (92vert240) | 1:05 PM 11/22/2008 |
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No problem I just want to make sure that you understand the write up steps. I just went to the yard and found an already cut harness that had an interior plug, cut it off and spliced it in.
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92vert240
Offline
342 posts
S13 hatch S14SR20 stock record-12.35 at 110, 87 t-type 10.69 at 132. hatch daily.
Mount sinai ny
3-10-2005
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 2:10 PM 11/22/2008 |
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Theres no junkyards w/ a 240 SOHC. I already called.
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yabeet
Offline
19 posts
90' Coupe
Calgary AB
5-28-2008
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 3:34 PM 11/22/2008 |
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| Quote, originally posted by mestizo » | | Unless something was cut or changed on ur harness then my write up should work perfect and you won't need to worry about pin 45 on the ecu cuz it's already connected to the power relays from Nissan so all you need to do is follow my write up. Also the "Zenki" in the title means my write up is for the early or 1st generation of JDM S14 SR20DET motors. |
Mestizo, what appearance differences are there between the zenki and kouki s14 engines? Would it be just the wiring harness connectors or a sensor or 2 being different?
Thanks.
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92vert240
Offline
342 posts
S13 hatch S14SR20 stock record-12.35 at 110, 87 t-type 10.69 at 132. hatch daily.
Mount sinai ny
3-10-2005
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 4:17 PM 11/22/2008 |
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| Quote, originally posted by mestizo » | | No problem I just want to make sure that you understand the write up steps. I just went to the yard and found an already cut harness that had an interior plug, cut it off and spliced it in. |
You wanna see if they got another one? If i cant get one im going to cut the one off my daily and just butt connect the wires and forget about the plug.
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (92vert240) | 7:24 PM 11/22/2008 |
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| Quote, originally posted by yabeet » |
Mestizo, what appearance differences are there between the zenki and kouki s14 engines? Would it be just the wiring harness connectors or a sensor or 2 being different?
Thanks. |
I dont think there are many difference's between the two, but don't quote me on that. As far as I know the only difference is the ecu and harness, but even that may not be much different. I think Hijacker was looking into doing the research on this.
| Quote, originally posted by 92vert240 » |
You wanna see if they got another one? If i cant get one im going to cut the one off my daily and just butt connect the wires and forget about the plug. |
If I have time I can look and see if I have one laying around. If not I am sure there is some in the Pick n Pull yards out here.
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yabeet
Offline
19 posts
90' Coupe
Calgary AB
5-28-2008
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 12:04 AM 11/23/2008 |
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| Quote, originally posted by mestizo » | I dont think there are many difference's between the two, but don't quote me on that. As far as I know the only difference is the ecu and harness, but even that may not be much different. I think Hijacker was looking into doing the research on this.
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If you guys dont figure it out by then, I will see if when I go to pick mine up next month if I can tell any differences between them w/ a camera in hand...
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (yabeet) | 6:48 PM 11/23/2008 |
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You can do it if you have a few moments all you need is the pinout for the Kouki harness and then check to see what the wire colors/function are and then just compare it to my pinout's.Also 92vert240 I went out to the yards today and couldn't find any interior plugs they were all cut out of the cars at Pick n Pull. Sorry I tried find one but it looks like people have been scavanging harnesses.
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dm-ka
Offline
85 posts
Zenki S14
Ballwin MO
2-22-2008
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (yabeet) | 9:21 PM 11/23/2008 |
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The only visual difference between Kouki SR and Zenki SR is that Kouki has fins on the front of the head, much like S13 black top. That's about it.
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92vert240
Offline
342 posts
S13 hatch S14SR20 stock record-12.35 at 110, 87 t-type 10.69 at 132. hatch daily.
Mount sinai ny
3-10-2005
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 9:39 AM 11/24/2008 |
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| Quote, originally posted by mestizo » | | You can do it if you have a few moments all you need is the pinout for the Kouki harness and then check to see what the wire colors/function are and then just compare it to my pinout's. Also 92vert240 I went out to the yards today and couldn't find any interior plugs they were all cut out of the cars at Pick n Pull. Sorry I tried find one but it looks like people have been scavanging harnesses. |
Thanks anyway!!!
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92vert240
Offline
342 posts
S13 hatch S14SR20 stock record-12.35 at 110, 87 t-type 10.69 at 132. hatch daily.
Mount sinai ny
3-10-2005
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (92vert240) | 9:33 AM 11/27/2008 |
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Ok i got my SOHC interior plug. Im not good at computers like mestizo so maybe he can make an exell spreadsheet for the pinout. Looking at the plug and using the numbers he has on the pinout for the interior plug it goes as follows. 1 - blue/black
2 - yellow/red
3 - yellow/green
4 - open
5 - open
6 - blue/green
7 - black with a double dashed silver line
8 - looks black but it is called dark green
9 - white
10 - orange
11 - gray/ blue
12 - red/yellow
13 - black with single dashed sliver line
14 - green
15 - red
16 - purple
17 - light green
18 - gray now what? i got two reds and two blacks and some extra colors. Where can i find a piout for ths plug and find out what each one is so i can match them up?
17
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (92vert240) | 12:27 PM 11/27/2008 |
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THe interior plug wire colors should be the same on the sohc interior plug so all you would need to do is match color for color.
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92vert240
Offline
342 posts
S13 hatch S14SR20 stock record-12.35 at 110, 87 t-type 10.69 at 132. hatch daily.
Mount sinai ny
3-10-2005
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 9:36 PM 11/27/2008 |
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| Quote, originally posted by mestizo » | | THe interior plug wire colors should be the same on the sohc interior plug so all you would need to do is match color for color. |
Yes the 6 wires nesessary are the same but the (optional) ones are not. And there are more wires on the SOHC then the DOHC interior plug. I just used the six and hooked everything up. Now im just routing the wiring harness. Looks like the only thing i'll need to extend is the WAF wires. The boost control solenoid and ignitor wires were way short so i think im oing to run the whole assembly to the passenger side where the wires reach and just extend the vacuum lines. Should be running this weekend!!
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (92vert240) | 11:24 PM 11/27/2008 |
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The "extra" wires are the for the consult on 91+ nissan cars, so your car doesn't have this. If you get a consult plug from a 91+ car you can wire it into those wire's but again it's only required if you want to use a consult to read the ecu. It's not needed to make the engine run at all.
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yabeet
Offline
19 posts
90' Coupe
Calgary AB
5-28-2008
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 6:13 PM 12/6/2008 |
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So I picked up a S14 SR today.
So the TPS has 2 connector plugs... makes me wonder [I didnt include the wiring harness w/ sale] I will find the engine vin and run it on Nissan FAST tomorrow to see what car it came out of.
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hpballer76
Offline
174 posts
97 s10 slammed dd.. 89 hatch s14 sr project...
greensboro nc
2-9-2008
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (yabeet) | 8:05 PM 12/6/2008 |
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| Quote, originally posted by yabeet » | So I picked up a S14 SR today.
So the TPS has 2 connector plugs... makes me wonder [I didnt include the wiring harness w/ sale] I will find the engine vin and run it on Nissan FAST tomorrow to see what car it came out of. |
that engine was probabaly originally an auto. thats the reason for the 2 tps plugs. dont quote me on that but im pretty sure.
 http://forums.nicoclub.com/zerothread?id=416171 my s13 hatch build ^^ FS: lots of parts. s13,s14,sr,ka partshttp://forums.nicoclub.com/zerothread?id=402667
http://www.ProNSC.com <check it out
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yabeet
Offline
19 posts
90' Coupe
Calgary AB
5-28-2008
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (hpballer76) | 2:51 PM 12/7/2008 |
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Hmmm, I didnt know you could get a SR20DET vehicle in Japan w/ an auto...
I wonder how that will affect my wiring harness saga... maybe get a manual tps if that is the case.Either way tomorrow I will find the code and look it up on fast.
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hpballer76
Offline
174 posts
97 s10 slammed dd.. 89 hatch s14 sr project...
greensboro nc
2-9-2008
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (yabeet) | 5:06 PM 12/7/2008 |
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yep my s14 sr came with an auto trany on it. and as far as the wiring i was told you can just plug in the tps to one of the plugs and just cover up the other. but i dont know that for sure cause i havent finished my swap yet.
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yabeet
Offline
19 posts
90' Coupe
Calgary AB
5-28-2008
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (hpballer76) | 11:23 AM 12/8/2008 |
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Hmm Im going to look for a mtx TPS then. I think that will be pretty tacky looking just sticking out like a sore thumb....
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yabeet
Offline
19 posts
90' Coupe
Calgary AB
5-28-2008
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (yabeet) | 4:30 PM 12/24/2008 |
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Ok guys I have been doing a bit to tell the difference between a zenki and kouki S14 motor.
So according to an AVCR manual the Zenki runs from 93-96.5 and kouki runs from 96.6 to sometime in 98.Now there are 4 plug connectors that go into the ECU, the most basic way to tell is to look at the 2 middle plugs. On a zenki harness and ECU the middle left and middle right plug will have 10 pins across like so: Middle left plug:
. . . . . . . . . .
. . . . . . . . . . Middle right plug:
. . . . . . . . . .
. . . . . . . . . . On a kouki it will look like this with 7 pins on the middle left plug then 8 pins on the middle right plug going across: Middle left plug:
. . . . . . .
. . . . . . . Middle right plug:
. . . . . . . .
. . . . . . . . I have a Zenki, oh well.  Merry Christmas everyone!
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mestizo
For some reason they call me Big Rob
Offline
252 posts
Sacramento CA
11-19-2006
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (yabeet) | 6:57 PM 12/24/2008 |
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Good stuff! I am sure this will help people out there identify their harness.
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fast_s13
Offline
733 posts
Hermann,mo
2-23-2003
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 8:52 PM 12/24/2008 |
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only differnts i could find on the engine side of zenki and kouki are the maf sensors and plugs
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2005 ninja
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92vert240
Offline
342 posts
S13 hatch S14SR20 stock record-12.35 at 110, 87 t-type 10.69 at 132. hatch daily.
Mount sinai ny
3-10-2005
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (mestizo) | 1:24 PM 12/28/2008 |
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Ok just tried to start the car and it doesnt have fuel pressure. Tested for 14 volts at the fuel pump relay and dont have anything. WTF!!!
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yabeet
Offline
19 posts
90' Coupe
Calgary AB
5-28-2008
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| « Re: How to JDM Zenki S14 SR20DET swap into a DOHC S13 (fast_s13) | 1:51 PM 12/28/2008 |
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| Quote, originally posted by fast_s13 » | | only differnts i could find on the engine side of zenki and kouki are the maf sensors and plugs |
And would you care to tell everyone whats the difference between them? 
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