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heavy-duty OBD standards support question

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  • heavy-duty OBD standards support question

    Hi All,

    May be it is off topic, because my question retates to heavy-duty (HD)vehicles OBD. I will be glad if somebody know about forums which deals with HDs.

    Here my questions:

    1) I am looking for heavy-duty vehicles manufacturers list that supports OBD standards J1708/J1587 and new J1939

    2) This is more technical question. I want to know if Scan tools that support these standards can provide real-time data,
    vehicle speed, for example.

    The problem is that scan tool not connected directly to speed sensor.
    So, the question is if vehicle ECU itlself can provide real-time data,
    here I mean deterministic latency and/or if exists timestamps for this data.

    Also, the question is if scan tool also can provide this data in real-time.

    And if such latency is specifyed in standards J1708/J1587 and J1939 ?

    3) If exists for standards J1708/J1587 and J1939 some chipset like as ELM for OBD-II interface ?

    Thank you in advance