seb209726

Hi

I'm about to start a Megasquirt project on a 1999 Impreza GT (swiss wrx) and am in need of a suitable wiring diagram to speed things up a little.

I haven't been able to find one online so far despite looking, and the Subaru dealers in Switzerland haven't been very helpful so far...
The ecu is in question is the ae780 and I've only been able to find one pinout for the correct plugs, which turned out to not be applicable to my ECU (different pins free and used)
I intend to make a break-out board and use the standard loom as much as possible, hence why this is really important. I'm not afraid of building a custom loom, but in this instance I'd prefer to avoid it for various reasons.

While we are at it, I read in erlier threads that some of you have experience with running "generic" standalones with these cars...
Any information that you'd be willing to share, especially hardware related at this point to shorten my time scoping and probing around, will be most welcome! (dwell time of the original coilpack, whether it's a logical input or whether an igniter is needed, standard idle valve and boost solenoid valve working frequencies, triggering flanc, conditionning of the dreaded Subaru VR signal, injector impedance, choice of wideband, ...)
The car is totally original so far (apart from an STI7 bottom end I'm told, but that doesn't matter w.r.t. this issue) and I intend to get it running like this on MS with as much of the original sensors and actuators as possible before going for performance upgrades.

Thanks!
Séb

NB
Before geting into a debate about the choice of MS, I'm well aware that it might not seem to be the most reasonable option for an Impreza. (although it might not be so definite for the MY99-00....)
In my case, though, I chose MS for its versatility as I have several other projects in mind for the future, and was merely looking for a personal project car to get started and learn how to implement and use it... In that respect, the choice of a scooby is actually a pretty poor one, but as it was a child's dream, I really couldn't resist ^^

bustaMOVEs

iTrader: (31)

I know you said you don't want to get into a debate, but you can map your ecu via open source.
Otherwise, there's a guy called dimitris from Greece who builds MS for certain applications (mostly mx5) with pnp loom, maybe he could help you?
I'll see if I can find an email adress for him.

seb209726

Thanks!

And yes, I know. But as the initial goal is to learn MS in order to be able to use it on different platforms later on, it'd not be a time-effective solution for the intended purpose. Open source won't help me much with a BMW M60, a turboe'd M50, a Renault F4R, an old BMW M12 engine, a Mazda 323 GTR,or any other project (not all mine unfortunately ^^) on which I hope to be able to apply the gained knowledge to.
MS is interesting for both costs and versatility in many applications... I happen to have chosen one where that isn't totally true...

bigsigh

iTrader: (4)

Boosted on here does some work with megasquirt , might be worth a PM

His thread here https://www.scoobynet.com/projects-4...12-second.html

seb209726

Thanks for the link.
I'll PM him later on tonight... If he doesn't find this first ^^

euan_r

iTrader: (29)

There's no debate and you can't map 99 00 open source to clarify.

john banks

http://www.linkecu.com/support/docum...ion/MY99Manual

Page 31. LHD might be bit different.

johnlogie

iTrader: (4)

Not sure if this helps

http://ken-gilbert.com/wrx/mans/99-0...%20Diagram.pdf

seb209726

Thanks! It gives me a good idea of how things work. I momentarily only work from the pictures I took of my connectors at the moment as I'm away for a few days, and unfortunately the pinout looks quite different... But that's a good start!

Thanks! I had found it, and it's great for everything apart from the engine, where the 2.0 turbo isn't catered for...

And merry christmas to everyone reading!

boosted

Hi, what do you need to know?
I ran MS on my bugeye (using ford Edis coils) and now I'm away to run MS on my blob using the factory coil over plugs and trigger wheel.

Bob Rawle

You cannot map a MY99-00 ecu using Open Source.

ECU pin out is here ...

http://www.brdevelopments.com/docs/MY99ecu.pdf

AE780 is the european LHD version of AE800 which was the early MY99 ecu.

If you would like a full wiring diagram then give me your email and I will see if I can send its a 9 meg file so it will depend if you ISP allows downloads that size, I can send it out no problem

cheers

bob

boosted

That's twice Bob has helped out this week with wiring diagrams.
Top bloke

seb209726

Hi
Thanks for joining this thread!
I'd basically be interested in all the hardware settings you had to reverse-engineer ^^
I imagine that your current COP have different characteristics to the coilpack found on the classics, but things like working frequencies of the idle valve, boost control solenoid, whether hi/lo impedance injectors are standard, how to condition the std. trigger wheel signal (I read about the 2.2k parallel and 12k series resistor on the MS forum... is this the best way?) and all the like. If somebody has already gone through the process of scoping the various channels and knows what works and what doesn't, I'm more than happy to learn from his experience.

Thanks!
That'd be great. PM is on its way

Indeed!

boosted

Firstly what MS are you going to run?
All newage injectors are high impedance. Pretty sure classics are too, but it's easy to check with a meter.
And yes newage uses three wire smart coils, so MS has no problem driving them direct.
If you have a coilpack and leads I would strongly suggest running 36-1 and Edis. Especially so if your using Ms1

seb209726

The impedance of the injectors is effectively one of the least troublesome thing to check... unless you have no access to the car for a few weeks and are dying to order the MS with the correct anciliaries to get going as soon as you are back ^^

I decided to run MS3, with a V3.0 board.
I see where you're coming from with the advice of running EDIS, but that makes it a bit harder to make it a plug-and-play solution...
And why would you run a 36-1 trigger if the 6/7 decoder works? Apart from perhaps doing away with the VR conditionning hassle?

boosted

You would need 36-1 with Edis.
But as you say no need for Edis with MS3, I have always used MS1 V3, just recently bought my first MS2, so your way ahead of me with the Ms3! Software is similar with all setups, wiring similar too.
Being an MS3 I'm sure VR will work with no external mods

seb209726

Here is what I found. I'm just repeating what I read so far in my planning stages and will happily be corrected if I'm talking ***, though

The VR-conditionning is done on the main board, not in the MS1 chip or on the MS2/3 daughter board... The conditionning issue therefore remains whatever the version. There is apparently one VR-input on the V3.0 board, and a second similar one on the MS3X expansion card if one wants to use it.
Both of these seem to struggle with the output of the standard Sub' VR-sensors (too wide a range throughout the RPM range, from what I could gather)

I don't know much about Imprezas yet either, but if yours has a cam sensor (apparently not all 36-2-2-2 had one) and you wanted to use it to run sequential COP and ignition using MS2, you'll need a second conditionner circuit. From what I gathered so far, this board is superior to the ones offered by diyautotune or the standard conditionning circuit and could be an option: http://jbperf.com/dual_VR/v2_1.html
unless of course you had planned to prototype a conditionning circuit yourself, which is also possible.

With the same warning about the quality of information provided in this post, it seems that even the jbperf board needs some filtering to work properly. Source for this is for example this thread:
http://www.msextra.com/forums/viewto...5&hilit=subaru

I'm still reading through the MS forum, but I hope that this can help you if you haven't found out already. Or help me if I'm wrong and you know better. ^^

boosted

So you have ms1 v3? Not ms3?

seb209726

I don't have anything yet. - I'll order once I have the stuff sorted in my head to try avoiding paying postage and taxes twice.

I'll almost certainly go with an MS3 with v3.0 Mainboard, though.