Pinout for 4af?

[DBguy]

Hey,
I'm in the process of swapping in a 4af out of a 1989 Corolla SR5 into a dune buggy. I'm just trying to figure out the wiring. So the engine harness runs through the firewall and there are 4 plugs, one goes to the computer and the other 3 connect to the body harness. Is there such thing as a pin out diagram for the other 3 plugs? Or a wiring diagram that labels the wires? Would it be in a haynes manual or??

[NZAE92]

hey
are you talking bout the 4AFE or the 4AF because the AF is carburetted and doesn't have a computer thats what the carby is for but the 4AFE is the fuel injected version of the 4AF just to let you know
cheers
Greg

[DBguy]

I'm talking about the 4AF, the carbureted version. I guess it doesn't actually have a computer, by computer my mean the little box under the heater core etc...

[Flashmn]

by computer my mean the little box under the heater core etc...

Interesting... dont have one on mine.

[DBguy]

Hmm...I have on for sure, think it has to do with emissions control since we have aircare (like smog control for California?). I can't find an exact pic but it looks similar to this: http://i99.photobucket.com/albums/l2...mcarwiresA.jpg

Either way what I'm more concerned about is what's in the other 3 plugs?

[eage8]

Originally Posted by DBguy

Hmm...I have on for sure, think it has to do with emissions control since we have aircare (like smog control for California?). I can't find an exact pic but it looks similar to this: http://i99.photobucket.com/albums/l2...mcarwiresA.jpg

Either way what I'm more concerned about is what's in the other 3 plugs?

I'm fairly positive you don't even need to hook it up. It pretty much just takes in all the info from sensors and turns on the check engine light if it needs too. It doesn't control spark or anything.

It's only on california model 4AFs.

[jmaz87]

thanks mike don't think anybody else knew this one :P

[DBguy]

Alright I did a little more research, apparently it's a feedback system, so yeah it's just for emissions and would probably run without out it. I'll leave it on anyways it doesn't bother me. So far I've figured that 1 plug holds the ignition and starter wires, the single plug (white wire) I'm guessing is from the alternator +?, the third plug contains all the signals for the tach signal, oil pressure, cruise etc...some of which I don't need. And the last plug goes to the emission controls box.
I think what I'll do is cut the whole harness open and remove all what I don't need (cruise control, transmission connectors etc...) and go from there. I just didn't have the guts to go it earlier but the more I look at it the simpler it gets