Re: BMS Details
Posted: Thu Jul 31, 2014 11:39 pm
Great reverse engineering effort on your part!Turbo3 wrote:In the context of the CAN interface, what do you mean by an interface multiplexer?
There is nothing special about the Consult III+ hardware.
It is the Consult III+ software that has all the smarts (knows the requests and response formats).
"In the context of the CAN interface, what do you mean by an interface multiplexer?"
Having the ability to off-load a PC's software from generating all the interface protocol necessary like
when using the ELM327. Typically a PC via a USB/serial port just sends basic commands to a hardware
interface multiplexer to generate the lower level protocols necessary to interact with various modules
on the multiple CAN buses. Such a device is typically called a "pass-through device". An example of
such a device is the SAE J2534 produced by a number of manufacturers.
Utilizing a J2534 device one can, for daily/monthly/annual fee, download an OEM's, e.g. BMW/Porsche,
diagnostic application and have access to a vehicle's modules for either diagnostics or reflashing.
Basically all OEMs are now required to provide an application to interface to the J2534 standard,
which runs on a PC and interfaces with a generic interface (a J2534 device). At the present most
OEMs just provide an application to only access their ECMs which may require field reflashing because
of emissions and/or running problems for their ICE vehicles
Nissan, as many OEMs have, provides a on-line application to access their ICE ECMs and a few other modules.
Obviously since the LEAF is a ZEV, Nissan doesn't need to provide any application to access the Leaf's
Having observed Nissan Leaf techs when doing a Leaf update, they use a Panasonic Toughbook
with an interface cable/module with an OBDII connector. Most likely their app runs under WinXp,
like most OEMs, and relies on the interface cable/module to function similar to a J2534. Not having
access to the Consult III+, I'm assuming that it would be setup very similar to my diagnostics systems
I use for BMW, Porsches, & M/Bs.