Wnts2Go10O

iTrader: (12)

what information is being relayed to the magnetic ride control computer from the BCM in the corvettes?

wrencher

iTrader: (2)

The whole control module network is involved it the Magneto-Rheological Real Time Damping (MRRTD) system. There are many inputs, steering angle, yaw, vehicle speed etc... You would have to swap the entire module network & sensors to even come close to getting it to work. That would be a feat in itself. Even then it wouldn't match the swap chassis/weight etc. Is that what your attempting/contemplating ? ---------- EDIT; I keep forgetting, laymen terms... You cannot look at it as the BCM as the only input to the ESC module. It is the gateway module in this network. Communications between the GMLAN (CAN) & class 2 serial data modules emit from the BCM. In other words MANY modules feed information to each other.

Wnts2Go10O

iTrader: (12)

i understand that its just a piece of the puzzle, an important piece of the pie, etc, etc. however, from all the research so far.. the BC module gathers a multitude of sensor inputs (yaw, accelerometer, wheel speed (maybe), vehicle speed, steering position, brake...pressure?) then relays them to the controller module (which has suspension position come directly from the 4 suspension position sensors) in some fashion. it looks to me that either the bcm is a central hub for the data from the required sensors and data from the pcm that communicates with the suspension controller or it gathers all that data but also does portions of the calculations which then sends those via the can-bus to the controller which finishes the calculation/estimates and sends orders to the emagnets


the UT paper points at the bcm being a sensor interface, a way to gather all the data before its sent as one big packet to the controller. while its about a mechanical setup using hydraulics and servo motors... the overall concept is very similar... replace conventional hydraulic fluid and servo motors with an iron infused fluid and electromagnets.

wrencher

iTrader: (2)

Either way, the hi speed can/GMLAN communications will not be able to be simulated. Between network callouts & regular com traffic, it is highly specialized......(GM designed only not generic serial data/com) For instance, the steering input. That alone is a module controlled system. The column control module communicates that info via class 2 to the BCM & BCM to the ESC module via GMLAN. Missing components, modules & sensors will result in a non functional system full of communication & component fault codes.

Wnts2Go10O

iTrader: (12)

GMLAN/J2411 has been hacked/manipulated/modified concerning the onstar, locks, windows, starting, radio, etc so thats not exactly going to work. there is a doorway into it, modifying the communication isnt the goal though.

yes, the system wont work without the right parts being used... the ENTIRE purpose of this thread isnt this 'dont or cant.' its supposed to be 'what goes where and how.' wiring diagrams say a lot but dont tell me what the modules are saying to each other, doesnt tell me what the model in the MSCM is, among other things.

wrencher

iTrader: (2)

Impossible ? I agree it's not.
Hacked to point of full system usefulness? Not likely there is quite a bit to reverse engineer there.
Specially to emulate the network.

On top of that some modules put in cars have build lists ( internal network lists of vehicle equipt modules) that are written one time. Thats it done, one time write.
There is also some hardware issues to deal with.

Doubt anyone has yet hacked it to the point of address word of info protocol, request protocol addressed data streams etc. that list goes on & on. Or to say completely hack & identify the the whole network communication from A to Z.
There is a lot in there to hack.
This info is not given up freely by GM either.
Specific communication coding surely is not considered information needed for anything. Nor would they want to give away their engineering to whomever.
You or that person undertaking this task fully would be a GMLAN reverse engineered pioneer.

Wnts2Go10O

iTrader: (12)

and yes, obviously GM wont tell... thats sort of an obvious thing. face pal worthy sort of obvious.

some things that we are looking at include work done by one who goes on forums by: 'GTOSoft.' Seems he found a way to log the slower SWCan coms. He even came up with an android app for it.

i think the key to the whole thing is simply treating it like what it is, a network. luckily, the couple people who are interested in helping have a lot of experience there.

Wnts2Go10O

iTrader: (12)

http://g8gt.blogspot.com/2012/04/adv...d-part-ii.html


high speed and low speed SW-CAN reader.