multiplex codes

Anyone help me track down the multiplex codes for a peugeot 307, I have a
canalyser diagnostic tool and need the database to sort out some engine
trouble

Thanks

Pete

 

Hello,

So you need stations' addresses ? Not sure it's some kind of "public"
information, but if you've got a CANalyzer, I guess you've got an
oscilloscope... You could try to find out some IDs on plugging that into the
CAN port of BSI (engine management is CAN_HS).

 

There is no adress in such a network and if Peter has a CANAnlyzer (Vector
tool?) he can simply connect CAN wires to correct pins on BSI (I've not the
PIN out) and see messages.
The problem is then to decode signals in messages and after modify values to
reach the objective.
According to me, an oscilloscope will be useless.

R1

 

Salut,

True, no addresses, but an ID on message header, to deliver it to right
stations & arbitration (see acceptancve rules).

Useless as he wants to decode frames, but may be interresting to see what a
CAN frame looks like

 

but then an oscilloscope analyses analogue values

 

Hello,

True it's analog values, but you just make the statement (for example) "a 5V
level is a logical 1, 0 is a logical 0". As we're talking about a digital
system, there should be no value between 0 and 5V (according to my example).

 

http://obddiagnostics.com/

and a search on google for ODB II (2) can help as well...


good luck

 

i've tried (not sure why) to read the scope values on an older green engine
ecu diagnostic plug(multiplexed code output)
the scope i used (which was good enough for everything else) wasnt fast
enough(even at its slowest setting) to tell me anything of use)
the digital info pushed out needs a digital converter to translate it
up and down sequences in this case dont translate into fault codes,as they
did with led tests

 

Hello,

Huh, I forgot the signal speed :-/
Of course, you're right ! I was only concentrated around signal amplitude
(which is quite simple to see, as they are digital).