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Thread: Problems with communicating efilive to max232

  1. #1
    New Member
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    Jan 2006
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    1

    Default Problems with communicating efilive to max232

    Hi I have a vs s3 v8 auto commodore and am having problems with getting efilive to communicate with the ecu.

    I have made the max232 and the two transister circuits and they both have the same problem. ie.

    I plug the connections into the aldl socket,
    then connect the aldl cable to max232 device,
    then connect the serial cable to max232 device,
    then start efilive v4,
    then connect serial cable to laptop,
    then select gmhvrvsv8 config
    then turn the ignition on

    I then try chatter and it dosnt detect any, I dont think it is meant to???
    I then click the record button and all i get is an echo of the sent
    data back from the max232 device.
    I dont seem to get any other data.

    Am I meant to start the car? or is it meant to send data while ignition is on??

    Any help is appriciated...

    Jamie

  2. #2
    Junior Member Doctor Bob's Avatar
    Join Date
    Jun 2003
    Posts
    18

    Default

    The VSIII pcm is a hybrid unit, mostly compatible with the VT system, not sure which settings you need to communicate with it
    GMPX may be able to elaborate

    Rob

  3. #3
    Lifetime Member GMPX's Avatar
    Join Date
    Apr 2003
    Posts
    13,148

    Default

    Quote Originally Posted by jnedmonds
    Hi I have a vs s3 v8 auto commodore and am having problems with getting efilive to communicate with the ecu.

    I have made the max232 and the two transister circuits and they both have the same problem. ie.

    I plug the connections into the aldl socket,
    then connect the aldl cable to max232 device,
    then connect the serial cable to max232 device,
    then start efilive v4,
    then connect serial cable to laptop,
    then select gmhvrvsv8 config
    then turn the ignition on

    I then try chatter and it dosnt detect any, I dont think it is meant to???
    I then click the record button and all i get is an echo of the sent
    data back from the max232 device.
    I dont seem to get any other data.

    Am I meant to start the car? or is it meant to send data while ignition is on??

    Any help is appriciated...

    Jamie
    If it's a SeriesIII V8 there is no chatter, it's basically a VT PCM with VS data bus.
    You should get a response to the Mode $01 Table $01 message though.
    Try $F1, $F4 or $F5 as the module I.D, I think $F5 is the one you need, I can't recall, been a LONG time since I looked at ALDL data streams.

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

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