EG VTi ECU PIN OUTS

[VTi_b0i]

Hey all, Just had a slight dilemma, when changing my ECU, a pin came out and ive got no idea where it came from...The car still runs fine but the engine light is on and flickers etc. The wire that came out was ALL WHITE so it should be failry easy to locate.

So i was wondering does anyone have the pin out diagram for an EG VTi..
Thanks

Christian:honda:

[TODA AU]

Hondatech.com.au
Sign up & check manuals.

[VTi_b0i]

cheers, yeah im on that but i thought seeing as it was an american site it would be different?

[VTi_b0i]

edit: LOL i thort u meant honda-tech
thanks heaps

[Paul1985]

edit: LOL i thort u meant honda-tech
thanks heaps

They are still US manuals but about 90% of thw wiring ive dealt with on my EG is the same as the US models as i have used the helms for assistance on wiring many times.

I need to find a EG and/or DC electrical only guide..
The helms has alot, but not everything.

At the moment i need to know what each pin on the actual underdash fusebox itself are for (i know the wiring but not which pin each wire needs to goto lol..

Anyway, the helms will help you...

Compare the plug with the pins on the ecu itself... count how many pins there are on the ECU and how many are being utilized in the plug itself. You may get lucky and there will only be one pin not being utilized and you will know its this one.

[VTi_b0i]

lol thanks heaps paul.. what do u mean by helms? all i need to know is the 1 plain white wire. but i cant find anything at all. everytime i search i type in EG and ECU etc and it doesnt search for those words...

[Paul1985]

ill have a quick look and see if i can see it in the manual...

Helms = US version of gregorys/haynes workshop manuals..
Helms is one of the better ones with alot of info.

They are the manuals that you can download off hondatech.com.au

[Paul1985]

Here you go, here are the 3 ECU plugs on the EG underdash harness taken frpom helms.
Pretty hard to read... Not sure if they are the same plugs as yours, dont know what harness/engine etc.. this is all i have.. Hopefully it's the same.

http://i16.photobucket.com/albums/b35/Paul_K_1985/ecu-plugs.jpg

[VTi_b0i]

thanks heaps for that paul... im not sure if its the same tho... its the plug from the original EG VTi so its OBD1... ill try have a look tho

[VTi_b0i]

OK, i followed this wire, it looked odd because it wasnt run with the rest, and it goes thru the firewall... so this shows it was installed when the mechanic installed my motor (b18c)
and it turns out its for the Knock Sensor/vtec. the wire it is connected to in the engine bay is white/yellow. anyone know where its supposed to be plugged into in the wiring harness connectors? HELLPPPP LOL!

[Benson]

are you talking about the ecu or the engine bay connector

[jdm_b16a]

This is a little bit confusing dude!

Do you want the pinouts for an ECU to your EG VTi? or to your conversion, which you say is a B18C?

Easy if you tell us what ECU you are using.

If its a OBD1 P28 like on my B16A then the VTEC solenoid wire is A4. It's normally ORANGE/WHITE. The VTEC Pressure Switch is D6 (ORANGE/BLUE.

If its the Knock Sensor, its D3 (RED/BLUE).

A, B, D= Slot. Numbers are read up and down from left to right, not straight across (see diagram at end).

http://www.t24ever.com/images/obd1%20ecu%20plugs.gif

Peter

[ECU-MAN]

a good idea would be to check the ecu to see what fault code it has, that will help identify the wire that came out, then you put it back where it belongs.

[VTi_b0i]

thanks mate, but how do i check this?
the car is an EG VTi, the motor is a b18c SiR and the ECU says the ECU that came with the conversion was P72, but now its running a P06 chipped for NepTune. but the wiring wasnt changed at all so im assuming its still P72 wiring.
Im after the wiring going into the ECU guys, sorry for any confusion.
I surfed ALL after noon yesterday trying to figure it out but to no avail.
I followed the 2 wires back thru the firewall and they are connected to a Red/Blue wire, and a Yellow/Green wire both with grey spots. its the Yellow/Green wire that i need...

[Paul1985]

Well, the schematic i posted wont be suited to your needs.

But if you get a B18CR manual (i.e. DC2 Type R) from hondatech.com.au
They are free to d/l, you just gotta sign up.

From there.. Goto the "Fuel" section.

From there look at the first few pages of this section. It will no doubt have an illustration of where all the sensors including knock sensor are.

Goto the knock sensor pages. Look at the wiring schematics within these few pages. It will show you where the Knock sensor wire goes/what colour it is.

Once you have studied this part and know the wire colour etc etc..

Look through more of the fuel section for all the ECU plug pinouts (the same as i posted on the previous page except for the B18CR). If these plug pinouts are not in the fuel section, they may be in the wiring section.

Once you find this and what color wires goto which pin, you should find that the knock sensor one is missing.

I'd look for you but i dont have an ITR manual and i dont wanna d/l one right now lol.

[VTi_b0i]

thanks heaps paul! yeah i downloaded the civic one and its 1258 pages! haha wont the teggie vtir one be more suited?

[ECU-MAN]

if you bridge your SCS connector does your MIL blink a fault code.

you should have a SCS

[Paul1985]

thanks heaps paul! yeah i downloaded the civic one and its 1258 pages! haha wont the teggie vtir one be more suited?

Yeah, whatever your engines from..
I'm not sure on any wiring differences between ITR/VTiR. Never looked.

Download the best suited one and you will be able to work it out.

[Paul1985]

BTW. The plugs/pinouts page on the EG manual is the very last page.. just hit "End" on the keyboard. You would need to look through the wiring section to find out where each plug is located on the harness' though. But, this is useless for what your looking for.

You need the B18C wiring schematics.

Definately worth doing what ECU-MAN has mentioned. It will confirm what your issue is. You never know, maybe that wire isnt off your knock sensor... And if it has been re-wired by a mechanic, how do you know he used the same wire color etc... You may end up chasing your tail. Pretty sure ECU-MAN wrote up a DIY in the DIY section on how to check your ECU for faults.. I'm not sure.

[ECU-MAN]

http://www.ozhonda.com/forum/showthread.php?t=67113

click on the sensor abriviation for full diagnostics of that sensor.

[VTi_b0i]

thanks heaps guys... yeahh the mechaniic did re wire these 2 wires, the reason i know what they are is because i followed it from the ECU back thru the firewall into the engine bay, and thats where i can see that theres one connected to the red/blue wire and one connected to the yellow/green, the one im stuck on is the yellow/green one... but i think maybe ill just take it back to the mechanic to see if he can fix it...
Im just scared of what might happen if i plug it into the wrong place.
im not sure if vtec is working or not as with boost i cant overly feel it/hear it anyway because vtec kicks in at 4k and thats when it starts hitting full boost so i duno if its the boost of vtec pulling harder...

[BluEG]

your wiring should be obd1 wiring whether it be p28, p06, p72.

my guess is the extra wires would be either :

1. knock sensor (which would retard timing)

2. vtec pressure switch

as said before do a ecu cel check to find out what code you have then
we can tell you what pin to put it in.

[VTi_b0i]

yeahh cheers mate... ill have to get a mechanic to check this...unless anyone else can, or recomend someone to do it?

[grumpy rooster]

We can check it with the Tunerview. Send me a PM and we'll sort out a time. :)

[VTi_b0i]

Thanks for coming by again Darren, its greatly appreciated!
ok guys we've sorted it out. The ECU threw 2 Codes:
#41
#20
Now weve just got to fix the problem :D

[ECU-MAN]

reconnect the o2 heater, wire probably came out of OBD1 A6 ( code 41 )

I can disable the ELD in the ECU for you as you probably dont have an ELD installed.. ( code 20 )

[VTi_b0i]

thanks heaps ecu man. il hav a look when i get home, but i cant re conect it because i lost the pin lmao. would it cauz any damage driving it like this? or put the tune out?

[grumpy rooster]

Don't stress.

We can disable the ELD and reconnect the wire. :)

[VTi_b0i]

haha me stress? neva lol i just dont wana cauz any damage :p

[Paul1985]

haha me stress? neva lol i just dont wana cauz any damage :p

If this were to happen to me, as i have so much old wiring harness lying around, i would de-pin 1 wire from a old plug and cut the wire about 5-10cm.

I would then solder the pinless wire to this 5cm wire with pin on the end, then i would plug it in.

Simple... You just need to know how to depin the plugs.

To depin one of these plugs i use a sewing needle...

You need to pull the sides of the plug down on the side which you will be removing the pin from (i cant really explain this, if you intend to do this yourself, let me know and ill go depin a plug and take photograph the processes so you can DIY).

Then you need to use the pin to push the little clip that holds the pin you are removing out of the way, then you can pull the pin out.

Installation is reverse of removal.

Do you have any old honda plugs lying around you can remove a pin from?
Some other make/model plugs have different sized pins so it pays to be taking it out of a similar plug and test fit it before you end up wasting time soldering for it to just not fit.

I'm also assuming you know how to solder and have the soldering equipment??

If not then it would be a 2min fix for someone who has the equipment and know-how.

[AKmotorworks]

lol chris ur such a noob, darren will fix it up for ya next week :)

[VTi_b0i]

hahha! im not a noob! i CAN do it, i just dont know where it goes, or have a pin :p bloody cars! a new thing surfacing every day! now i need to replace my swaybar as its sitting on my ITR LCA's and causing damage LOL one thing after another :p

[Paul1985]

hahha! im not a noob! i CAN do it, i just dont know where it goes, or have a pin :p bloody cars! a new thing surfacing every day! now i need to replace my swaybar as its sitting on my ITR LCA's and causing damage LOL one thing after another :p

Welcome to the world of modifying cars. lol