Air Con and Tableswitch
 

Want to wire up my MS3 + 3X so that it switches tables when the A/C is turned on.
I have a 1995 1.8l Eunos.

How would I connect up the A/C to the 3X ?

My guess is:
2s to pin 20 (Inj H) on 3X
1j to pin 25 (Nitrous2)
1q to pin28 (Tableswitch)

I think Greg G has done similar.

I think the tableswitching may be unnecessary for ms3 since it has the AC feedforward mechanism. But FWIW, my signal for tableswitching came from 1J. Then again, if you want to tableswitch before the AC is triggered, maybe 1Q is a better choice for MS3.

Can't help with pin specifics though :/

Sounds like I may have my inputs/outputs crossed.

From DIY:
" Any of your on/off input pins (30, 11, 29, 28) may be used for A/C input, and any of your medium current outputs (24, 6, 25, 26, 27, but I'd save 9 for the IAC valve) may be used for fan or A/C output."

So, 1j is A/C input (I'll use pin 29 and save tableswitch for something else) and 1q is A/C output.

What? No 1q= input, 1j= output

:doh: Cheers Greg, I'm starting to confuse myself here. Thought I had it right before.

I'm running the latest code (not yet published as a pre 1.1 alpha) and the changes to the A/C system are incredible. Ken (muythaibxr) has added an idle speed target adder so you can both increase initial duty AND raise the idle speed target when A/C kicks on.

I still need some tuning on my EAE to get rid of the little lean blip when it kicks on but:

http://y8spec.com/megasquirt/images/...idle_pre11.png

I'm a complete :noob: when it come to logs but that does look really smooooooooth.

Arrrrggg don't tease me! That's the adder I'm trying to emulate with the extra solenoids :vash:
:giggle:

What does EAE have to do with AC engagement?

A/C is adding a load (equivalent to a little extra throttle) so it sounds like he's added some code to use EAE to compensate.:2cents: I could well be wrong though.:noob:

EAE is always running.

you honestly don't need table switching if you have the MS3X idle up code. I use it, but when I disable there's no difference.

As I suspected, no table switching needed with the idle duty adder...

Thanks guys, my quandary has been well and truly answered. You're all superstars :bowdown:

Hey y8s, could you post a graph with both AC and headlights on? Thanks :)

I can't. it's not as good though. it pushes load up further than I have reliably tuned VE.

btw the EAE tuning is responsible for correcting for transient MAP events. if you have a little lump of lean when the load kicks up for AC, it'll fix it. same for little rich spots when it kicks off.