MK2 NA > Turbo Write-Up

[MR2-MRnot]

one more question, so the factory IC fan, since the EA1 connector isnt used, does it still come on? or did u have to hard wire it to a switch? i have the relay box thing for the fan, it clips right into the engine harness

[Basement Digital]

Originally Posted by MR2-MRnot

not quite sure HOW i overlooked this, so where did you guys get yours from? and the 91 AT plug A fits?

You overlooked this because it was only mentioned once in my writeup; yet it's a huge component of the swap. I've fixed that now.

I got mine from ebay with a hacked-up body harness for cheap. I know I got a little lucky on that one, but you could try a number of sources (including this forum).

And yes, according to my '91 service manual - the '91 NA Automatic ECU has identical plugs to the turbo ECU (albeit a slightly different pin configuration). Potentially all MK2 Auto's use these same ECU plugs. Maybe someone else can verify this information?

[MR2-MRnot]

hmmm, very interesting, i wonder if this is ONLY for the sw21 AT or if it also qualifies to camry/celica AT configurations? anybody who happens to know be not afraid to chime in, im about to find out, because that would make it hella easier for EVERYONE, a quick stop to the local yard would be super easy rather than hunting a hard to find part like the Turbo or AT mr2 A plug!!!

[Basement Digital]

Originally Posted by MR2-MRnot

one more question, so the factory IC fan, since the EA1 connector isnt used, does it still come on? or did u have to hard wire it to a switch? i have the relay box thing for the fan, it clips right into the engine harness

I originally intended to use it - but that would entail a bunch of wiring (EA1 among other things). I've also since read that people bypass the controller because the IC tends to get heat soaked before the fan clicks on anyway.

In short; hardwire!

[MR2-MRnot]

sounds good to me, ill just rig it up to come on with the key! that way its always on!

[Basement Digital]

Originally Posted by MR2-MRnot

hmmm, very interesting, i wonder if this is ONLY for the sw21 AT or if it also qualifies to camry/celica AT configurations? anybody who happens to know be not afraid to chime in, im about to find out, because that would make it hella easier for EVERYONE, a quick stop to the local yard would be super easy rather than hunting a hard to find part like the Turbo or AT mr2 A plug!!!

It'd probably be worth checking out either way. If Celica's have the same plug I'll be hunting them down at all the local junk yards for sure.

[MR2-MRnot]

def. u could make money that way!!!!!

[MR2-MRnot]

ok ONEE more question...what happens to the extra wires from the cut NA body harness? we hook 8 of them up, but according to the pinout of the NA, there are 12 wires! wat happens to the other 4 and wat are they used for?

[Basement Digital]

Originally Posted by MR2-MRnot

ok ONEE more question...what happens to the extra wires from the cut NA body harness? we hook 8 of them up, but according to the pinout of the NA, there are 12 wires! wat happens to the other 4 and wat are they used for?

2 pins are used for AC, one for CC and one for ABS.
(EDIT: Sorry, actually 1 for AC, 1 for CC, 1 for ABS and 1 for the unused fuel pump relay)

I did not use these, but you could.

I just pulled the pins from the plug to keep it clean.

[Basement Digital]

Originally Posted by Basement Digital

2 pins are used for AC, one for CC and one for ABS.
(EDIT: Sorry, actually 1 for AC, 1 for CC, 1 for ABS and 1 for the unused fuel pump relay)

I did not use these, but you could.

I just pulled the pins from the plug to keep it clean.

Also, remember that this is for 91 NA to 93 turbo conversions. I think that the 91-92's share a pinout that changed in 93 - and then of course 94 is the first year of the gen 3 3SGTE that requires more complex modifications.

[MR2-MRnot]

got it, but i just made a diagram in paint, the only wires that dont match up to the A turbo harness are VF, A/C, BLK, and the FC (which is wired into the engine harness)
O, btw im running 92 NA to USDM 3s harness and ECU, but with a JDM gen II motor

but on the turbo ECU side wat about the AC1, ACT, FPR, STP?
obviously the AC can be left out, as i dont have it, so that leaves the BLK, VF, AC1 (i pressume is for the AC, if so it can be left out also) ACT, FPR, STP i also pressume that the FPR is the fuel pump relay ur talking about, but if you leave this out how does the FP kick on? (or is it a part of the ignition switch on an NA body harness and i shouldnt worry about it?)

[ChadRay13]

Will the A plug from a 93 N/A Auto work?

[MR2-MRnot]

so i just found a site...its god if your swapping, i literrally just made a wiring diagram with it, its not just the pinouts, which can be found numerous places, but it tells u wat each abbreviation stands for, i matched a couple from the turbo and NA ECUs that werent labeled the same! also basement digital, thanks for all ur help!!! if anyone wants a copy of my Paint diagram, it is for a 92NA-92T i havent used it YET, ill let ya know if it works tho!

[ChadRay13]

So I picked up the 93 N/A Auto plug, it fits in the ECU, I should be good to go with that, right?

Send a link to that site you found pls

[braydo]

The way it is wired in Basement Digitals diagram, Your intercooler will automatically come on when the key is turned to on.

[mattdouken]

This is one great write-up,the only question I would like answered is'If I was to get a rear clip(as I plan to)'With a rear clip is there anything I would need for the swap that may not come with the clip?

[Basement Digital]

Originally Posted by mattdouken

This is one great write-up,the only question I would like answered is'If I was to get a rear clip(as I plan to)'With a rear clip is there anything I would need for the swap that may not come with the clip?

These are things you may want to ensure are included:
Rear hubs/brakes/axles/suspension, exhaust, uncut body harness/gauge cluster, fuel pump. None are required for the swap (as you've learned from this write-up) but not getting them could defeat the purpose of getting a clip.

[mattdouken]

Thanks for the reply 'Basement Digital',But is the gauge cluster needed at all or can I just stick to the N/A one?And do you know where i may be able to pick up a 93 Lsd swap non-clip.All the places I have been say 91-93 for there engines and i want to be guaranteed a 93 lsd.



________________
Mid-Attack..........Come Get Some!

[Basement Digital]

Originally Posted by mattdouken

Thanks for the reply 'Basement Digital',But is the gauge cluster needed at all or can I just stick to the N/A one?And do you know where i may be able to pick up a 93 Lsd swap non-clip.All the places I have been say 91-93 for there engines and i want to be guaranteed a 93 lsd.

The gauge cluster is not required, but some people desire it due to the fact that your clip will presumably come with most of the wiring needed to enable all of its functions. For example, I don't have a "fan warning light" in my NA cluster - so I never had to worry about doing that wiring with my clip-less conversion.

Personally I could care less about that feature because I hardwired my intercooler fan to be on all the time. Some purists might consider that unclean; it really just boils down to what you personally want out of your swap.

It's been a while since I was in the market for a motor or clip, so I can only really recommend the oldest and most reputable source I know of. They also happen to be one of the most expensive, but they will be able to tell you what you're getting and you can be confident you'll get what they describe.
http://www.jarcoinc.com/image/halfcuts.asp

[mattdouken]

Thank you.that was very helpful.No more questions thanks.