Technical question

How should I connect this set-up

THE CAR : CIVIC 1999 HB OBD2B

THE ENGINE : CIVIC 1998 OBD2A

LEFT ODB2A __________________ AND________________ RIGHT OBD2B

Yes, I have the both computer, OBD2A et OBD2B
THE CONNECTEUR ON THE ECU OBD2B IS MAIN HARNESS UNDER DASH
THE 3 OTHER CONNECTOR COME FROM THE ENGINE

I HAVE 4 CONNECTOR, I DON'T UNDERSTAND HOW I WILL CONNECT EVERYTHING


I know they exist a convertor harnes OBD2B TO OBD2A


I STILL HAVE 4 CONNECTOR

what should I do

 

u would have to buy the OBD2B TO OBD2A jumper so u can us the obd2a ecu

 

I have what you need for sale.

 

What I will do with the connector with a red "?"

___

What I will do with the connector with a red "?"




Modified by hondastreet at 3:30 AM 7/2/2008

 

BUMP, QUESTION WHY 4 CONNECTOR

 

Sorry to bring up an old thread hit did you ever get an answer to your question about this extra plug and if it is needed?

 

Anyone?

 

you can't use an obd2a harness in an obd2b car you need a engine harness from a 99-00. they make ecu adapter not a harness adapter. and the ecu with 4 spots for plugs is from an automatic.

 

Correct^

 

Would an engine harness work from a 1999 1.6 se? I have the same problem as this guy, Please reply

 

if your car is a 99-00 then yes if it's a 96-98 no it won't

 

Trust me, I learned the longer way, LOL. You need to use a harness that matches the year of your car in this particular instance.

 

Thanks folks, let you know how i get on, in for a cup of tea at the minute, struggling to get the intake manifold off to get at this harness!

 

Is this true??? I have a 97 ek hatch with a b20 vtec I got a 00 si harness thinking it would be the right thing to do. So what your saying is that this wont work I need a 96-98 civic harness. Please help im trying to get this car on the road

 

Use your single cam harness that came with the car for swapping in the B

 

Yeah, you'll have to make the necessary alterations as well

 

here, i got the old harness in now, bought a dizzy converter for it to fit. problem that i have now is the cabin harness. The immobiliser unit does not match for me to use the b16 immobiliser unit! HELP!

 

Immobilizer unit?

 

yeah, its the little plastic box that has the plastic ring that goes around the barrel. theres a little plug that should be fitting directly into it but it doesnt.

 

http://www.ebay.co.uk/itm/Honda-Civi...item53f096b5c3

This is an image that what the old one looks like.

 

the immobileser will work fine regardless of the ecu
but you will find a red/white wire in the green plug that needs to be cut or it will short out the sensor voltage wire from the ecu dropping the voltage down to around 2V and cause all sorts of issues

once you have found that wire and cut it at the green plug
the rest is plug n play

I spent 5 days chasing this until I sat and followed every wire to find the problem
here in Australia all EK civics have the immobilizer standard

 

You would have been better off just getting a adapter harness to obd1 and getting a obd1 B16 ecu.... there are ways to bypass the immobilizer as said above .... or google By-pass immobilzer and im sure someone has a detailed write up on it.

 

thanks guys, i may try it but the only reason im doing it is trying to narrow down the fact that the engine is turning over, but i aint getting any spark. Theres fuel going to it yeah but no spark. Plus there isnt a green light on the dash.

I have got a odb1 adapter harness for the b16 ecu fitted. Any thoughts?

 

then that obd1 ecu does not have a immobilizer ... you have an issue somewhere else

 

Okay folks, try n help me out here.

I have sent the attachments above (hopefully you can see them okay)
But really i have four wires coming from the dash harness - brown, blue red and yellow/black. I need to somehow wire these into my immobilser unit. The large box as seen in the image attachments.

Any info would be appreciated.
Thanks