evoscan

iTrader: (-1)

Anyone got a AYC or ACD unit you can send me? my unit did not work with the wiring diagram given.. in fact red and black would have shorted out if I followed the circuit diagrams you gave above.. so be careful. It must be a JDM unit I had with slightly different wiring. I was trying to get the actuator commands from the MUTIII unit, in fact it was a session FAIL yesterday, I couldn't get AYC unit to fire up, and couldn't get the Evo1/2/3 ecus to fire up and talk to the MUTIII unit.

evoscan

iTrader: (-1)

See the differences below... and I still can't get my ACD ecu wired up on the bench...

24 - ground for G-sensor (both)
23 - G-sensor long
11 - G-sensor lat
37 - brake light warning
31 - power backup <==
17 - power source <==
38 - brake switch
47 - ACD MODE switch
40 - TALMAC LED
52 - GRAVEL LED
51 - SNOW LED
36 - connection with Engine ECU pin 87
39 - TPS
16 - electric pump relay
43 - 5V for pressure sensor
32 - input pressure sensor
10 - ground for pressure sensor
1 - proportional valve for ACD control
19 - ground for left front wheel speed sensor
20 - ground for right rear wheel speed sensor
21 - ground for left rear wheel speed sensor
22 - ground for right front wheel speed sensor
6 - signal for left front wheel speed sensor
9 - signal for right rear wheel speed sensor
8 - signal for left rear wheel speed sensor
7 - signal for right front wheel speed sensor
33 - steering wheel sensor
34 - steering wheel sensor
44 - steering wheel sensor
50 - ground <==
42 - ground <==
26 - ground <==
35 - OBD port, pin 7
46 - OBD port, pin 1

ACD with AYC <R.H.D>
31 - power backup (apply 12v)
13 - power source (apply 12v)
38 - brake switch (apply 12v = on) (also goes to ABS)
23 - G-Sensor Longitudinal (also goes to ABS pin 25)
11 - G-Sensor Lateral (also goes to ABS pin 14)
47 - ACD Mode Changeover switch (apply 12v = on)
40 - Tarmac LED Light
52 - Gravel LED Light
51 - Snow LED Light
39 - Throttle Position Sensor
36 - goes to EFI ecu pin 87
39 - Brake Warning LED Light (park brake LED)
49 - connects to ABS ecu pin 3
7 - Right Front Wheel Speed Sensor (comes from ABS ecu pin 21)
8 - Left Rear Wheel Speed Sensor (comes from ABS ecu pin 20)
6 - Left Front Wheel Speed Sensor (comes from ABS ecu pin 32)
9 - Right Rear Read Wheel Speed Sensor (comes from ABS ecu pin 18)
16 - Electric Pump Relay
43 - 5v for Pressure Sensor
32 - Input Pressure Sensor
10 - Ground for Pressure Sensor
1 - Proportioning valve for ACD control
3 - Proportioning valve for AYC control
15 - Direction valve - Left
3 - Direction valve - Right
33 - Steering Wheel Sensor
34 - Steering Wheel Sensor
44 - Steering Wheel Sensor
42 - Ground (negative)
26 - Ground (negative)
35 - OBDII Port, pin7
46 - OBDII Port, pin1


EVO6 AYC only has 8x2 pins on the right.
39 Battery Backup
31 Ignition

46 ground
26 ground

10 OBDII pin 1
23 OBFII pin 7

fostytou

iTrader: (15)

PM'ed

Ceddy

Download -> 401303_4-23-10.zip

Attached update of Evo8 ACD, 401303, definition.

The tables labeled Neutral, are used when the ACD button is depressed, I think so you won't spin out when switching Modes, because of an abrupt change in lockup.

I still need to get a Scaling for Steering Angle.

I have been trying to find how the tables are "added" together, but the math is complex, so it will take some time.

SeanV

I can get access to an Evo 8 and Evo 9 and they both have Ralliart ACD Roms in them.

I have the EcuFlash Beta installed on my laptop and also a OpenPort 2 cable.
All I need now is the info on how to download the Roms off the cars and I can send them to you.

Let me know if u are interested.

Oh and great work all around.

evoscan

iTrader: (-1)

Hi Scheides, any luck with forwarding me that spare ACD? anybody else got one they could lend me?

acamus

I have searched for plugs today for this ecu, so I thought it would save someone's search.
http://jae-connector.com/en/pdf/SJ030493.pdf
http://jae-connector.com/en/pdf/SJ030492.pdf

rawkus

iTrader: (16)

Don't know if this matters to anyone at all, but there is just one part number for the ACD Control Unit for USDM CT9A Evos, 8631A028.

For European Evo's VII through IX, there are 7 different part numbers depending on year and model. And there are 5 different part numbers for the Japanese models.

Side note, do all RalliArt Flashes disable AYC? I personally have AYC on my heavily tracked Evo VII and have had no issues related to unpredictability or reliability concerns and I would love to have pushbutton selectability change balance from oversteer to understeer depending on track conditions, that would be a game changer in Time Attack.

Dan

logic

iTrader: (2)

acamus, quick question for the wiki (I've updated the connectors page with part numbers). I don't have the ACD ECU in my hands right now, so can't check the plug: do we know which pins are large (power) and small (signal) (or are they all the same size pin)? Or better yet, does someone have a good picture of the plug-side of the ACD ECU that would show off pin sizes properly?

(Edit: nevermind, it looks like Hamish has a good picture here. 10 large/power pins for the 26-pin connector, 6 for the 22-pin.)

The pin part numbers I've found are:

MX5-SG-C1-5000 (small, signal)
MX5-PW-C0-4000 (large, power)

And, for the archives (in case those PDFs go away at some point), the connector part numbers are:

MX5-E-22S-C-N (22-pin plug)
MX5-E-26S-C-N (26-pin plug)

Also, looks like none of the usual suspects over here in the U.S. carry the MX5-E connectors (DigiKey, Mouser, and Newark are the ones I checked), and the connectors aren't available as samples from JAE (but the pins are). :P Some of the other MX5 connectors are stocked, though (MX5 and MX5-A), and JAE lists them all as "active".

I should put together a pinout page on the wiki for the ACD ECU to go with the main ECU pinout pages; maybe I'll spend a little time tonight going through the FSM and cross-referencing with Hamish's list a few posts up.

logic

iTrader: (2)

Hmm. Hamish's picture shows a 26- and 22-pin connector for the ACD+AYC ECU, but the diagram below shows a 16-pin connector instead of the 22-pin. I'm guessing it's a w/AYC vs. without AYC difference? (I also don't have my FSM in front of me. I'll have to check this tonight.)

fil78

Dan
Ralliart has made one 'circuit/ track' version of the ACD/AYC ECU. (part# ra168749C1)
I use it on my track only evo IX with great success in terms of improved lap time vs the OEM acd ecu.
it has 3 mode : dry track - slippery track - wet track

Alain

Danieln

iTrader: (1)

Alain....are you sure that your ACD is not set like this:

tarmac = dry
gravel = semi-wet
snow = full wet

As far that I know....this is the setup in your RA ACD for evo with AYC.

Did you menage to read this ACD?

Cheers

DanielN

evonut270

I'd like a copy of that C1 rom for testing.

Danieln

iTrader: (1)

+1

rawkus

iTrader: (16)

Alain,
After doing a bit of research, that particular ACD Computer does not appear to be compatible with the Evo VII.... would love to see the rom!
Dan