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Phần mềm OBD II Connector

Thảo luận trong 'Phần mềm và thiết bị chẩn đoán chuyên dụng' bắt đầu bởi hyundai, 8/5/12.

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  1. hyundai
    Offline

    Bằng lái Hạng F
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    Tham gia ngày:
    7/10/09
    Số km:
    5,182
    Được đổ xăng:
    2,437
    Mã lực:
    2,130
    Xăng dự trữ:
    12,676 lít xăng
    The OnBoard Diagnostics vehicle plug has 16 pins.
    Normally this female plug is only equipped with the metal pins that the car needs in order to satisfy the protocols that it’s Electronic Controller Units (ECUs) “speak”.

    Therefore, it is possible (within a reasonable limit),to “guess” which protocol(s) a car complies to, just by looking at those pins.
    The pins are numbered as follows:
    [​IMG]
    Examples (may be incorrect!):
    An ISO9141-2 car needs pins 5,7,16, and may need 15.
    An ISO14230-4 car needs pins 5,7,16, and may need 15.
    An SAE-J1850 (VPW) car needs pins 2,5,16.
    An SAE-J1850 (PWM) car needs pins 2,5,10,16.
    An ISO-15765-4 car needs pins 5,6,14,16.
    NOTE-1: It seems the L-line is “optional” for both ISO9141-2 and ISO14230-4,
    and that probably only older cars will need it…
    NOTE-2: It is possible that a car suports more than one “official” protocol,
    and so it will have a combination of these options. They normally will
    also sport a few of those “discretionary” pins… (there’s a lot to hack:)
    NOTE-3: Be advised that ALL the pins (except 4,5,16) can have non-standard
    allocation!!! This means that (for example) an ISO9141-2/ISO14230-4 car can
    use the SAE-J1850 pins for whatever they want (and vice-versa)!!!! The only
    rule stated in the specs is that when this happens, those pins cannot confuse
    or damage a specification-compliant tool!…
    NOTE-4: You may or may not use pin 4 (chassis ground). If you draw power from
    the plug, then it’s a good idea to use it (max power = 12Vx4A = 48W).
     
  2. tinhnguyen3688
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    Tài xế O-H
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    Tham gia ngày:
    9/5/10
    Số km:
    152
    Được đổ xăng:
    14
    Mã lực:
    0
    Xăng dự trữ:
    -10 lít xăng
    thank bác. Bài viết của bác rất hay. :D
     
  3. sammam
    Offline

    Tài xế O-H
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    Tham gia ngày:
    10/9/15
    Số km:
    16
    Được đổ xăng:
    2
    Mã lực:
    1
    Giới tính:
    Nam
    Xăng dự trữ:
    123 lít xăng
    thanks cụ
     

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