bloody hell, S-AYC here

 

I'm not arguing about this because i didn't made my homework as I should about it. I kept all my focus on the ACD only cars. So i took the electrical schematics for Evo 7, 8 and 9 and looked at every wire that enters and exists ACD, and measured all the sensors or searched to see how they're working.

But i remembered that i looked at ACD&AYC and i seen that the pin-out is different totally. I don't have the proof yet, because i'm home now, but tomorrow i will recheck my manuals to see if it is like i remember. So, if the pin-outs are different, can the ACD&AYC ecu still be the same?

i hope they are the same, because this will only make things easier for everybody.
Tomorrow i come with proofs.

 

Can you get a 555 timer and a bread board? You can make a test signal with that pretty easy.

 

I'm pretty sure the ACD/AYC takes signals from the ABS system with regards to wheel speed.

 

I realize I have little to no experience with this, so I expect this to be completely wrong, but could table A be where the ACD is pulling its value for how long it stays in lock up?

I remember reading or hearing somewhere that changing the modes from tarmac to snow to gravel was really only changing how long the ACD stayed in "lock" or whatever % of "lock" it was in.

And looking through the tables, the only one that seemed to really be changing significantly was table A.

 

I have another hunch that the big table is speed vs steering angle or steering angle rate of change.

If you look in the EvoScan functions, steering angle direction and steering angle speed are the only functions that have 512 in the formula... and it's using it as the limit (because it's subtracting x/4 from 512).

Looking at the x axis on the "big table" the range goes from 0 to 512.

This would also make sense in regards to the table, as this would say at low speeds and high steering angles, the ACD will not go into lock-up, but at higher speeds, the ACD will allow lock-up. But it would also seem to show it would only allow a 50% lock-up in a straight line.

For the B & C tables that have a x-axis range from 0 to 450 I'm wondering if they would be the lateral g-force and Accel/Decel g-force inputs... which might also make sense as you would want to be able to vary lock-up based on how much you are accelerating or turning... but what doesn't make sense is that the tables are almost 2-D, which looks like it would be ignoring the g-sensors all together.

Thoughts?

 

Question about logged Oil Pressure: (Not 100% sure how system works.)

Is this pressure at the pump/reservoir or pressure at the clutches?
- Pretty sure its Accumulator Pressure.


I'm not understanding how feedback occurs? Is there another oil pressure sensor or something???

There are two analog inputs that may be used as some sort of feedback, if some could explain how it works in the hardware I could figure it out in the code.

 

checked evo7-8-9 workshop manuals, its accumulator pressure.
I found only one pressure sensor with all three. Its a bridge type sensor, using +5V, GND and pressure signal. The signal range from the manual seems to 0.5V to 4.5V.

 

can you use this to see the trouble codes thrown? i would love to see what exactly happens when my windshield wipers cause all three ACD lights to come on.

 

check the passengers side electrical connections in the footwell.the 8s here are known for water getting into the electrics through the seal at the bulkhead.http://www.lancerregister.com/showthread.php?t=307571

 

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I really want to be able to reflash the acd. Those that have paid for a reflash have posted up that it works better than many suspension mods.

thing is the control over it being able to tune for oversteer at will on short autox courses or tune in more stability on high speed road courses.

That would be great !!!!

 

i am hoping it can be done without much difficulty as well, i am guessing A LOT of testing has to be done on new maps to see the outcome.

 

I also can't wait for this to come into fruition, being an avid autoxr. The one thing I noticed that is sitting in the back of my head is that the 1.3 cable is required for this. My 1.3 just crapped out on me so I had to get the ultra super duper awesome 2.0 . I'm really hoping that the 2.0 will be compatible with these flashes. I can't wait for some tables to be posted saying "use this setting for over steer, use this setting for under steer, etc."

 

1.3 is what I use. had to use the secret hack when i upgraded to 1.41 EcuFlash but it works unlike the 2.0 cable

OT bump for sba update

 

when EvoScan logging is sorted, you will need the 2.0 cable for both logging and flashing.