multiplex codes

Discussion in 'General Motoring' started by Peter Phillips, Feb 16, 2004.

  1. 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


    Peter Phillips, Feb 16, 2004
  2. Peter Phillips

    G.T Guest

    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).
    G.T, Feb 17, 2004
  3. Peter Phillips

    R1 Guest

    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, Feb 18, 2004
  4. Peter Phillips

    G.T Guest

    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 :)
    G.T, Feb 20, 2004
  5. Peter Phillips

    mindwipe Guest

    but then an oscilloscope analyses analogue values
    mindwipe, Feb 20, 2004
  6. Peter Phillips

    G.T Guest

    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).
    G.T, Feb 21, 2004
  7. Peter Phillips

    Marc Guest

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

    good luck
    Marc, Feb 22, 2004
  8. Peter Phillips

    mindwipe Guest

    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
    mindwipe, Feb 29, 2004
  9. Peter Phillips

    G.T Guest

    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).
    G.T, Mar 3, 2004
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