Electrical Q's

[sergei]

Check the common colour of the wires on the injector plugs (the plugs which go on the injectors) with loom disconnected measure the resistance between two plugs pins, when you find common wire within 2 plugs (total 4 pins to checks, when you get 0Ohm this is common) remember the colour of this wire, and try to find it on other end.
BTW I see you still got plug with fat white wire - this should go on constant fused 12V (always on).
What I was doing, becuase I did not had I wiring diagram, I just stuck multimeter on the ignitor pins and was going through the all pins on the plugs untill I found connected. In toyota IGN wires are usually black-red or black-orange.
Check three black wires on the black plug, something rings a bell about them.
When you get to connecting alternator wires (due to differences the way loom are routed) there should be white and yellow relatively thin wires (load signal to regulator) should connect to similar colour wires (if you have old loom intact you could trace it from alternator plug) inside of the car.

[johntramp]

I will try find that common wire now. If/when I do find it, what should I do with it?

The big fat white one is already +12v.

I will let you know how it goes. Cheeers

[sergei]

You should connect it to IG2 on the switch, also make sure that coil/ignitor has 12v supply from IG1 (but nothing stops you connecting it to IG2)...

[johntramp]

The common wire into the injectors is the Black/White. I was not able to find where it comes out tho. I have a cut loom tho aswell which came with the engine so I will strip that back and see where it goes to.

If this is the problem then I should still be getting a spark shouldn't I ?

Cheers

[johntramp]

found it. It is the Black/White wire on the same plug as the fat white one in this photo,
http://img462.imageshack.us/img462/9922/ecuend0jw.jpg
...the one at the top which can just be seen.

So I should splice that into the IG2 switch now?
Hopefully this isn't too much of a stupid question, but how do I tell which is IG2 - Is it any different to IG1??


Cheers

[sergei]

There is no differnece, these are parallel, just make sure you split the load, ie - ECU+Ignitor on one, and Injectors are on other
You will have to check same way as you did with injector power for ignitor/coil. Disconnect ignitor from the loom, disconect coil, measure resistance between coil pins and ignitor pins on the loom, when you find a common wire, check wich one is it on other side, should be black-something as well, probably very close to injector 12v feed (the one you found earlier)...

[johntramp]

Ok. I will do that tomorrow. I connected the injectors to an IGx and now it is passing all the tests on the previous page (apart for the ones for when the engine is running) .

I assume these problems are all because I am only using the engine half of the AE111 loom. Is there anything else I may need to do still that you can think of?

Cheers

[sergei]

You will have to connect:
Oil light
Engine Warning light
Speed signal from dash (usually purple with white stripe)
Alternator light/load sense

[johntramp]

ok, but none of them are required to get the car running tho right.

[sergei]

right.

[johntramp]

I have look at those wires this morning. From the ignitor's plug to the coil's plug there is one common wire (red arrow) which is direct - it does not go back into the loom.

On the ignitor plug there is one black/white wire (green arrow) which is the same +12v as the one I spliced earlier for the injectors.

From the coil's plug the other wire is also black/white (blue arrow) but that is not the same wire as the one on the injector's plug... although it does go to the same plug at the other end of the loom.

I am guessing that the green arrow and blue arrow wires are from other sides of the IG switch to split the load, as you were saying earlier. Does that sound right?

Should I splice the blue arrow wire to the other IG from the green arrow wire?



Hopefully I you can understand me

Cheers

[sergei]

So: the ignitor already feeds off same power supply as are the injectors?
But the coil feeds off different wire, right?
To make it easier, if ignitor already connected connect just the coil to different IG...(which I assume is blue arrow wire or black-white)..
Could you please tell me what that bit of insulation on the coil plug and what is spliced there (if it is, doesnt look like) - colour of wire and where it goes?

[sergei]

The ignitor plug:
2 wires going to ECU. (IGF + IGT yellow-white, blue-white)
1 wire going to Coil (black-red)
1 wire tacho signal (black- something)
1 wire is power feed (black-white)

I assume the ignitor is grounded through body.

[johntramp]

Could you please tell me what that bit of insulation on the coil plug and what is spliced there (if it is, doesnt look like) - colour of wire and where it goes?

That loom which I took the photos of is a crap one which was on the engine when I bought it. It had been cut where it goes through the firewall and also is missing plugs etc. but I used it to see where stuff goes a little easier.

The loom I am using in the car is in good condition.

The tape on there is covering where the plastic looks to have melted :S


I will connect the coil now to IG.

Cheers

[johntramp]

ha! shes running

Thanks heaps sergei, couldn't have done it without ya!

[sergei]

no problem.

[johntramp]

is there any trick to wiring the dash in?

[sergei]

the wires for dash should be in the loom left inside of the car, there are no tricks, just follow the colour codes, and maybe trace the oil warning light (if you have guage then you will have to use the sender of your old engine), engine check light (I think your car did not have one so you will have to improvise), alternator charge circuit (battery light), I had to extend alternator wires becuase they exited on other side of the loom, due to AE82 had different routing of body loom. You wil probably will have to reintegrate the window wipers loom (because they were on old engine loom), I assume you don't have AC or not planning to use it so it will make easier by ommiting the AC circuits completely... Don't forget SPD wire (purple-white) should be connected to the wiring loom coming from dash, unless AE85 does not have that provision and then I don't know, maybe AE86 dash or 555 circuit to fool ECU of thinking that car is rolling.

[johntramp]

ah, so if the ecu doesn't know the car's speed will it not run correctly?

I guess I am going to have to pull the dash apart to get at the back then.

[sergei]

Hmm, I'm always forgetting that you car was not efi before... I honestly have no idea where are the wires for oil light etc in a non efi car (never done one before), I'm sure someone else done AE85 conversion before....
With SPD, if it does not have input on SPD it will have lower revlimiter, and sometimes might throw an error code...