Consult Interfaces & Software

[MearCat]

Mmm - I'd say this would only be in the R34 GT-R. They have a G readout on the dash display.

[NewKleer]

quite possibly that would just be from an external accelerometer than something in the ecu? what other things are on the dash? if theyre largely mechanical type things (rather than typical sensor readings from consult) then id say thats what it is

does it say anything in the service/user manual (if there is one?)

Edited January 24, 2006 by NewKleer

[RANDY]

The R34's show the G-sensors digitally on the dash for 2000 models up, and mechanically for 98-2000 models.

The R32 GTRs and GTS4's have a couple of G-sensors around the place, but you don't get to see what they're doing. I think they would go to the ECU though.

[realist]

I'm pretty sure the g-sensor would need to report to the ECU for ATTESSA functionality, unless of course there's a sperate unit/controller for it...

Also, just to confirm... HICAS is also controlled from the ECU? Or does it just manage the steering angle sensor and the like somewhere else?

[cowie165]

Re: G-sensor ECU input for R32 GTR. The last few pages are the relevant section. It's the Autospeed article on the R32 from years back.

R32.PDF

[TokyoTaxi]

Hi,

Does anyone's version of Datascan have a map for R32 RB20DET ??

Mine only has R32 RB26DETT

[NewKleer]

just try the other rb ones, i think one of them is close?

[TokyoTaxi]

RB26 does work but I'm not sure if it's accurate & RB25 does not work at all. Is it the norm for everyone to just use the RB26 map ?

[realist]

Re: G-sensor ECU input for R32 GTR. The last few pages are the relevant section. It's the Autospeed article on the R32 from years back.

<{POST_SNAPBACK}>

Thanks for the article, which for those that havn't read it, explains how to intercept the signal between the accelerometer (g-sensor) and the ECU. Which also allows for modification (i.e. piggyback system).

However, what I'd like to do, is read the sensor output voltage from the ECU (via the consult port)

Suppose we could try some reverse engineering.

[NewKleer]

trying to read g-sensor via consult port would mean reprogramming the ecu (and knowing how to do something like that). would take 5% of the time of that to just read the voltage directly from the sensor.

[MattSR]

You cant read the G readings from the ECU simply because the ECU doesnt have anything to do with the 4WD system. ATTESSA has its own Computer in the boot, and as far as I know it doesnt have a consult port on it.

[RANDY]

Oh yes... that's right... they do have a seperate controller in the boot for ATESSA.

[realist]

I thought this would be the case, as the HICAS unit is in the boot also. Reading the sensor voltage would require more hardware... (i.e. A/D converter)

[ebola]

The documentation I have read implies that there *is* a consult port (that is, it had an id byte after a two byte initialisation)

it just doesn't seem to be wired up.

Of course, I could be wrong.

though it appears that all the computers get *all* their data as sensor voltages.... ahh, the possiblilties are endless

(when I make that attessa controller, I'll share it with confidence - as opposed to state my theory and get shot to pieces)

While I'm at it, I'll ask this question:

What are the inputs to the hicas computer, AND how does it control the pump (r32).

heck - the same with attessa. I have partial information on the input, none on how it controls the centre diff.

I suspect I'll need to get at it with a multimeter one day...

[NewKleer]

supposedly air con, hicas, and auto transmission can be queried via consult protocol, but ive never had success. i saw a table of whats supported in what vehicle, and i think the common cars only support ecu, whereas gtr and z32 (which ive never tried) support some of the others

[caz]

Consult and Conzult work with AirCon, Hicas and Auto Trans in the Z32's. They each have their own seperate control unit but all read from the DDL.

quote=NewKleer,31 Jan 2006, 06:26 PM]

supposedly air con, hicas, and auto transmission can be queried via consult protocol, but ive never had success. i saw a table of whats supported in what vehicle, and i think the common cars only support ecu, whereas gtr and z32 (which ive never tried) support some of the others

<{POST_SNAPBACK}>

[NewKleer]

have released an alpha version of ecu talk while or work on the consult lcd

http://www.ecutalk.com

needs .net framework 1.1, links on the downloads page there

Edited February 13, 2006 by NewKleer

[GTsauRus]

supposedly air con, hicas, and auto transmission can be queried via consult protocol, but ive never had success. i saw a table of whats supported in what vehicle, and i think the common cars only support ecu, whereas gtr and z32 (which ive never tried) support some of the others

<{POST_SNAPBACK}>

on my r32 gtr the hicas ecu wont respond to the initialisation unless there are delays between bytes but the engine ecu responds with no delays could be to do with the extra distance to the hicas ecu in the boot or even the different processor used by hicas, my ac ecu also remains silent with no delays but i have only just discovered

the need for delays and have not tested for the aircon delays yet.

i read that plms have to send initialisation more than once sometimes they are possibly not using delays.

my hicas responds to hex ff ff e4 with 10 then i send d1 f0 hicas then streams the error codes FF020000 ff start byte, 02 number of data bytes following, 0000 error code bytes ie no errors when ignition was last turned off

[RANDY]

I think I know when something is WAAAY over my head! =-]

[NewKleer]

sounds good ugboot - have u tried scantech nissan (which supposedly supports the hicas/at/ac ecus) to see if they work on yours, or do they send it too fast also?