34 Daughterboards

[darkhalf]

okay attached is the address file and an image. well this wont look completely right in rom editor. there appears to be additional flags used which are used and wont calculate right in romeditor and my nistune software currently

if you look at the hex addresses for ignition/fuel they are definately 3D maps but you will need to check them because they look different to other ecus ive decoded maps from

i'll have to update my software to cater for the additional flags and recalculate the A/F ratios etc. unfortunately without disassembling the code i wont be able to find TP for maptracing functionality

matt

[ian]

For example -

# Variable,Start-Address,X,Y,Map size,value,Map-name

HIGH_FUEL,&H1400,16,16,256,1,High octane Fuel map

This means -

Start address is at 0x1400

It's a 16 by 16 (decimal) grid

That there are 256 (decimal) values (ie 16*16)

And the default value is 1

Correct?

[ed]

Sorry for being so quiet guys.

darkhalf, my car is still at the panel beaters after a month of waiting they now tell me the front bar is still MIA.

I have no idea when it comes to the tech side of the ROMS so not much help.

Ed

[darkhalf]

Ian - yep that is correct. It is the formatting that ROM Editor uses for displaying generic data properly internally

The main things you need to know is the location of the map (address) and its size. However knowing how the table is represented in A/F ratio, volts or whatever is also another good thing to know

[ian]

I've been testing the address file agains the ROM dump from my car, and am not sure if they match up.

ie at x1c00 (high ignition time map is -

0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0a 0x0b 0x0c 0x0d 0x0e 0x0f

0x1c00 0x19 0x12 0x0e 0x0a 0x08 0x05 0x03 0x02 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00

0x1c10 0x23 0x1c 0x18 0x14 0x8f 0x8f 0x8f 0x8f 0x8f 0x85 0x80 0x80 0x80 0x80 0x80 0x80

0x1c20 0x26 0x21 0x1e 0x1c 0x96 0x96 0x96 0x96 0x96 0x93 0x89 0x80 0x80 0x80 0x80 0x80

0x1c30 0x26 0x2a 0x26 0x20 0x9a 0x99 0x99 0x99 0x99 0x99 0x96 0x8d 0x86 0x82 0x80 0x80

0x1c40 0x26 0x30 0x28 0x21 0x9d 0x9a 0x9a 0x99 0x99 0x98 0x98 0x95 0x95 0x89 0x85 0x81

0x1c50 0x28 0x33 0x2d 0x24 0x9f 0x9d 0x9d 0x9b 0x99 0x98 0x95 0x95 0x95 0x8a 0x85 0x81

0x1c60 0x29 0x33 0x32 0x2c 0xa7 0xa3 0xa1 0x9f 0x9d 0x9b 0x97 0x97 0x97 0x8b 0x87 0x83

0x1c70 0x29 0x31 0x2d 0x2a 0xa9 0xa6 0xa4 0xa4 0xa3 0xa2 0x9d 0x9c 0x9c 0x92 0x8d 0x88

0x1c80 0x26 0x31 0x2d 0x2a 0xa9 0xa6 0xa3 0xa2 0xa1 0xa0 0x9c 0x9b 0x9b 0x91 0x8c 0x87

0x1c90 0x26 0x31 0x2d 0x29 0xa6 0xa2 0x9f 0x9e 0x9c 0x9c 0x99 0x98 0x98 0x91 0x8c 0x87

0x1ca0 0x21 0x31 0x2d 0x27 0x25 0x1f 0x1e 0x1c 0x1b 0x1b 0x19 0x13 0x13 0x13 0x08 0x03

0x1cb0 0x21 0x31 0x2d 0x27 0x24 0x1f 0x1d 0x1b 0x1b 0x1b 0x19 0x14 0x14 0x14 0x08 0x03

0x1cc0 0x21 0x2f 0x2f 0x2a 0x24 0x1f 0x1e 0x1d 0x1c 0x1c 0x1a 0x19 0x19 0x19 0x0f 0x05

0x1cd0 0x21 0x2e 0x2e 0x2a 0x24 0x20 0x20 0x20 0x1f 0x1f 0x1d 0x17 0x17 0x17 0x0a 0x03

0x1ce0 0x21 0x2c 0x2c 0x2a 0x24 0x21 0x21 0x21 0x20 0x20 0x1d 0x18 0x18 0x18 0x08 0x03

0x1cf0 0x21 0x2b 0x2b 0x27 0x25 0x23 0x22 0x22 0x22 0x21 0x1d 0x1b 0x1b 0x1b 0x0d 0x06

The first row, and first column are headings.

[ed]

Auto or Manual Ian?

[ian]

Auto or Manual Ian?

The sort of in between one ie the M-ATx

(for those that don't know the r34's that well :-), there were three configurations. MT (manual), E-ATx (full auto), and M-ATx (Manual/Auto ie full auto, plus the slide over position that can be used to move up/down a gear, plus the paddles on the steering wheel :-)

ie it is a 1998 GTX Turbo 4 door - http://english.auto.vl.ru/catalog/21632/

I can send you the bin file if you like, PM me a real email address. :-)

Ian

[ed]

Auto or Manual Ian?

The sort of in between one ie the M-ATx

(for those that don't know the r34's that well :-), there were three configurations. MT (manual), E-ATx (full auto), and M-ATx (Manual/Auto ie full auto, plus the slide over position that can be used to move up/down a gear, plus the paddles on the steering wheel :-)

ie it is a 1998 GTX Turbo 4 door - http://english.auto.vl.ru/catalog/21632/

I can send you the bin file if you like, PM me a real email address. :-)

Ian

<{POST_SNAPBACK}>

ed@nospam nice.com.au

darkhalf, you still out there?

[darkhalf]

yep im still watching this thread... recevied the ecu and has had relevant pads sucked out

i've got to wire up power and consult to this ecu and pull the rom image for this and then program the 27C512s ... will post progress as it goes

[ed]

aight thanks matt!

can you remove speed cut and boost cut on the ROM

[darkhalf]

that would be nice, but i dont know where these values are located without the GRID address table. you could ask badbiki (lucus) if he knows since his boards are for sale now and accomodate this ECU but i somewhat doubt it (since he hasn't tested it on an ER34)

the maps/tables i worked out earlier were easier to find because of the patterns of data

anyway i'll try and run some disassemblers through the source and see if any work since i can't ID the main chip. if i could modify consult on this thing, i can make it realtime tunable and traceable cheaply like I have very recently got working on prototypes for SR20, RB20 and RB30 ecus (next up is R33 RB25...)

[darkhalf]

okay i've got the ER34 ecu in front of me now and need some help from you guys. its powered from a 12v lead acid battery and currently drawing 80mA

pins 67/72 Control Unit Power to +12V

pins 25/32 Control Unit Ground to +12V

how do you know when the damn thing is powered on (ie if you didn't have an engine connected). there are no lights or anything to indicate life on the ECU itself.

Is consult the only way? On the consult port itself, do you need to have the CHK connected to IGN or GROUND to get it talking?

I have currently hooked up PLMS Consult (Rev#4) RX/TX lines to 75/76 (RX/TX)

I also connected Ignition power supply (31) to Ignition Switch Signal (24). At that stage I assumed pin 31 would provide 12v to get the pin 24 going. Measuring it afterwards however, there is no voltage from this pin (well about 0.6v). Hopefully I didn't damage anything yet by tieing these lines.

I also tried tieing the CHK pin to pin 31 but this would have worked either seeing there is no signal from this line

On other ECUs (R31,R32,R33) to get it started I normally get a LED light up when power is connected and connecting 12v to Ignition Switch Signal. I haven't done this yet directly from the +12v terminal

Have you guys got a wiring diagram for the engine management system for ER34? Big ask... but I need it to get proper power to the ECU and make sure I dont blow anything up (how much are these worth?)

thanks

Matt

[darkhalf]

okay thanks to ed for the wiring page (EC-11)

I put 12V on 67/72 (Control unit power) and 24/31 (Ignition signal and power supply)

Also put LEDs against the fuel pump, ECCS relay and malfunction outputs to see whats happening

Consult works fine now and downloading the ROM for this particular ECU. More to come...

[ed]

w00t!

go darkhalf

[darkhalf]

many hours later... working ECU with daughterboard

okay ed you have an email.

basically the board can run both 27C256 (ODD/EVEN programmed chips) or 27C512 (SKIP - both programmed with same 64KB image) because I used strip sockets rather than the ones which came with the board

the chips need to be 120ns or less. however after trying 2 x 27C256 @ 100ns i then tried 2 x 27C512 @ 150ns and it seems to run consult etc okay but in a running car.... dunno. should be okay i think but i dont have a datasheet on the processor to know its timings

we are looking at doing a realtime programmable version of this type of board. the bikirom one you have to turn off the car, upload and then start it back up. its not quite realtime yet....

[darkhalf]

okay guys i know this thread was a group buy for these GRID boards but I should be able to adapt these into an NVRAM version with full realtime tuning capability via the consult port. Currently working with PLMS on one of these for the S13 SR20s which I got prototyped last week but am looking into other models also. ER34 is definately a canidate

i managed to get the full code disassembled and have got the main maps for Eds ecu. however revs, limiters, k constant would need more investigation....

[Dr_Drift]

darkhalf,

Can you please send me what information you have on this? I would like to put a board I have in Ian's R34, and hopefully we can use some of Ian's expertise in finding out the rest of this address file?

Sound good for you Ian?

Sam

[ed]

You got email Matt

[infected flow]

You got email Matt

<{POST_SNAPBACK}>

gggggggggeeeeeeeeeeeeezzzzzzz ED about time !....hahahahha

[ed]

gggggggggeeeeeeeeeeeeezzzzzzz ED about time !....hahahahha            

<{POST_SNAPBACK}>

don't make me run you over! haha