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Discussion Starter #1
Hi
i've a 96 1.6 non vtec jdm integra with d16zcsohc plannin on doin a turbo conversion,
I'm really confused, i pulled my ecu out and it looks like neither obd1 or 2,
i've since established its obd1 but missing the B cavity cavities A and D are there is a p76 and wanna convert to p28 with a conversion harness but the B cavity is missing.its a d16zc sohc jdm engine.anyone?

however i found a pinout diagram online

https://www.google.co.uk/url?q=http://integraclub.ru/_fr/1/P76.doc&sa=U&ei=x_J1VcjeDJOv7AbQ4oPwCw&ved=0CBcQFjAF&sig2=7YpeP30cf6iqT0No5ZOY8w&usg=AFQjCNHSOiOoNKVoiZ8aBiEtj2j1OBd-5g


Any wiring master?
 

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Discussion Starter #2
just to clear things up this engine is a jdm d16zc only in dc1 integras can be found,NOT the d16zc sohc in the CRX si and its not similar to d16a6
 

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Any pics of this ECU? I am familiar with some JDM OBD-1 ECUs and they all have had the same plugs, just the case is more compact and more of the board is SMT.
 

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Discussion Starter #5 (Edited)
Any pics of this ECU? I am familiar with some JDM OBD-1 ECUs and they all have had the same plugs, just the case is more compact and more of the board is SMT.
 

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Discussion Starter #6
http://www.d-series.org/forums/audio-electronics/151478-weird-ass-obd-ii-ecu.html

Is the ecu you have like the one in the link?? If so he did the conversion, I think it's in that tread or in another thread he made. That 2 plug ecu is not here in the USA and there's not much info on it. He's the only one I know of that did the conversion.
ive seen that thread before, it looks the same with the connectors but mine is a p76, dont know whats the difference between that and mine
 

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What year is your car? Can't you just sell your ecu when the time comes for the turbo and get a p28? If your car is a 96 or newer you will need an obd2-1 adapter harness
 

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ej8
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ive seen that thread before, it looks the same with the connectors but mine is a p76, dont know whats the difference between that and mine
Try to do your best with pining out the wires. Most of them should be the same.
Your need to make a jdm to obd1 harness adapter.

What year is your car? Can't you just sell your ecu when the time comes for the turbo and get a p28? If your car is a 96 or newer you will need an obd2-1 adapter harness
Check the pix. his wont be plug in play.
 

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What year is your car? Can't you just sell your ecu when the time comes for the turbo and get a p28? If your car is a 96 or newer you will need an obd2-1 adapter harness

The ecu the op has isn't like the ecu we have here in the USA. The ecu the op has uses two ecu plugs and is like half obd1 and obd2. It's an odd ball ecu and so is the wiring. If I remember right the distributor is all so different from the ones we have.
 

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Discussion Starter #10
What year is your car? Can't you just sell your ecu when the time comes for the turbo and get a p28? If your car is a 96 or newer you will need an obd2-1 adapter harness
My car is 96 and obd1 with only 2blocks with a p76 rare ecu,just thinking it
might be easier to replace the engine for a z6 along with dash and engine loom,how hard would be to replace that whole thing?
 

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Discussion Starter #11
The ecu the op has isn't like the ecu we have here in the USA. The ecu the op has uses two ecu plugs and is like half obd1 and obd2. It's an odd ball ecu and so is the wiring. If I remember right the distributor is all so different from the ones we have.

Correct,even here in the UK noone know anything about this ECU
 

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ej8
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ZC Non-VTEC: ?????????? P76

Not in english but google can help with that.
Theain thing is it has the pin out.

And i remeber long ago helping with some of this from a member on here.

Your have to slice an obd1 connector into the harness and add some more wires.

The p76 ecu only has 2 injector wires and a few other things are missing.

So you have to hard wire them from the cab harness or right from the sensors themself.

Hopefully you know how to do wiring. If not then your better off getting a different car. Unles the cab harness will plug in play with an normal obd1 or pbd2 harness.
 

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Discussion Starter #13
ZC Non-VTEC: ?????????? P76

Not in english but google can help with that.
Theain thing is it has the pin out.

And i remeber long ago helping with some of this from a member on here.

Your have to slice an obd1 connector into the harness and add some more wires.

The p76 ecu only has 2 injector wires and a few other things are missing.

So you have to hard wire them from the cab harness or right from the sensors themself.

Hopefully you know how to do wiring. If not then your better off getting a different car. Unles the cab harness will plug in play with an normal obd1 or pbd2 harness.
So i need to get a obd1 harness and modify the existing harness?And a p28 will work ?
 

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I have a few questions for you, and depending on answers, this can be solved easily.

Q1 Under the hood, do you have a one piece engine harness that goes directly through the firewall, or do you have multiple plugs on one or both strut towers?

Q2 since your car is OBD2 or a hybrid OBD2, you should have a secondary O2 sensor. Is the plug/wiring for it sourced from the engine harness, or is it sourced from teh dash harness, similar to our USDM OBD2B setups?

If not sure about anything, please take pictures.
 

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Discussion Starter #15
I have a few questions for you, and depending on answers, this can be solved easily.

Q1 Under the hood, do you have a one piece engine harness that goes directly through the firewall, or do you have multiple plugs on one or both strut towers?

Q2 since your car is OBD2 or a hybrid OBD2, you should have a secondary O2 sensor. Is the plug/wiring for it sourced from the engine harness, or is it sourced from teh dash harness, similar to our USDM OBD2B setups?

If not sure about anything, please take pictures.
i will take some pics under bonnet later on,im sure the my car is obd1 just with different connections
 

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sounds good. I assumed OBD2 from the year, as most of our vehicles were fully OBD2 starting in 1996 in USA.

you may or may not be able to source other japanese auto's for the plugs. the OBD1 traditional honda ecu plugs are shared with some mazdas, for example. I wonder if your rare plug is shared by another vehicle in some way, which would allow you to create a seperate converter harness, instead of having to modify your actual wiring itself.
 

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Back again. Found out there are two euro style 2 plug variants of the p76. These were in old gobs of endless paragraphs in archived forum posts.

One style is described as a modified 4injector version of the old dual point injection that we had in USDM as the d15b2. The modification being 2 injectors were added and used as batch fire to increase potential fuel flow.

The other was described as simply a modified version of the wiring, but injectors were set up traditionally as 1 per cylinder, housed at intake flange.



So those pictures will sure help quite a bit!

Here is a wiring diagram for the modified batch fire. Note how 2 injectors are wired to each of the 2 fuel outputs


EDIT this diagram is the most recent I found, in this thread dated only a few years back
http://honda-tech.com/tech-misc-15/dc-1-p76-ecu-pinout-1344535/

EDIT use google translater on this one
http://www.todoautos.com.pe/f93/club-honda-31956/index155.html

If it sends you to page 1, the info Im linking is on page 155
 

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some civic ek in eu have such ecu with 2 plugs
you cant use only obd1 engine harness or obd2 does not fit an easier way is to make hybrid add one more plug and rewire harness
btw i think this harness came from rover
 

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Hey guys I have a couple questions for this same conversion. I am installing a P28 with automatic tranny, do I pin the lock up solenoid straight to the ECU?
Does the distributor wire have to shielded, like a ground the wires?
Do I remove the green plug, because from the original set up some wires from that green plug goes to connector A and connector D?
Where do I ground the Vtec pressure switch?
 
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