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I need an official document for reading information from PIDs that manage comunication with ECU of car. I'm searching to sae.org and iso.org but i don't find nothing.

Can someone guide me?

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  • generic obd2 pids are documented on the obd2 wiki and will probably point to the standard doc. anything else (extended modes e.g. mode 23) is on a pay to know basis.
    – Ben
    Nov 22, 2017 at 2:22

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When I was looking into this some years ago (I didn't pursue it), I came up with this list of docs. IDK if it's what you're looking for, but it's free.

  • J1850: network interface hdw, basic protocol, electrical specs, & CRC byte, per J2178
  • J1939: trucks? CAN_bus; http://en.wikipedia.org/wiki/J1939
  • J1978: minimal scan tool standards
  • J1979: 1-byte PID's J2012: DTC defs
  • J2178: 2-byte PRN's ... Class B Data Communication Network Messages
  • J1979: emissions-related diagnostic msg hdr and data fields, per J2178 (?)
  • J2190: other diagnostic data fields, per J2178
  • J2534: API for reprogramming PCM

ISO ...

  • 9141: WP OBD: ISO 9142-2 primarily used in Chrysler, European, and Asian vehicles
  • 11898: Road vehicles - Controller area network (CAN_bus).
  • 14230: Road vehicles - Diagnostic systems - Keyword Protocol 2000
  • 15031 vehicle-to-external-equip comm foremissions-related dx's. Same as J1979?
  • 15765: CAN_bus - support req'd after 2008 <-- *** --> maybe not 2004?
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  • to iso.org and sae.org they aren't free... But they are enought... did you know something regarding consumption?
    – Dario
    Nov 22, 2017 at 22:39
  • @Dario Sorry - I meant my list was free. I'm not clear what you mean by consumption.
    – George
    Nov 23, 2017 at 2:30
  • some scientific documents that talk about "calculate consumption from ECU data"
    – Dario
    Nov 23, 2017 at 17:20

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