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[Report 資料室]

다이하츠 코펜 OBD2관련 프로토콜

by Haitian 2009. 7. 20.
 현대 기아등 국내 차량의 OBD2관련 프로토콜과 아래의 다이하츠의 핀 프로토콜을 비교해서 수정해주시면, 환경관리공단의 스케너에도 충분히 대응될 것이라 생각됩니다.


다음은 다이하츠의 OBD2관련 배선도입니다.

사용자 삽입 이미지
사용자 삽입 이미지

각사 OBDⅡ트러블 코드표는 다음의 링크를 참조바랍니다.
各社OBDⅡトラブルコード表

참고 사이트 링크입니다.
http://kiroku.bufsiz.jp/keikoku2.html

OBDⅡ의 프로토콜 종류는 5가지가 있습니다.

OBD-II Diagnostic connector

Connector
Connector

The OBD-II specification provides for a standardized hardware interface—the female 16-pin (2x8) J1962 connector. Unlike the OBD-I connector, which was sometimes found under the hood of the vehicle, the OBD-II connector is nearly always located on the driver's side of the passenger compartment near the center console. SAE J1962 defines the pinout of the connector as:

표준적인 각 핀의 정보입니다. OBD-II 커넥터(차량의 운전석아래)를 보시면 16개의 핀이 있습니다.

  1. -
  2. Bus positive Line of SAE-J1850
  3. - Ford DCL(+) Argentina, Brasil (pre OBD-II) 1997-2000
  4. Chassis ground
  5. Signal ground
  6. CAN high (ISO 15765-4 and SAE-J2234)
  7. K line of ISO 9141-2 and ISO 14230-4
  8. -
  9. -
  10. Bus negative Line of SAE-J1850
  11. - Ford DCL(-) Argentina, Brasil (pre OBD-II) 1997-2000
  12. -
  13. -
  14. CAN low (ISO 15765-4 and SAE-J2234)
  15. L line of ISO 9141-2 and ISO 14230-4
  16. Battery voltage

The assignment of unspecified pins is left to the vehicle manufacturer's discretion.

Signal protocols
다섯개중에 하나의 시그널 프로토콜을 사용합니다. 미국수출용프로토콜은제일 아래의 [
ISO 15765 CAN] 인 듯 합니다.

There are five signalling protocols currently in use with the OBD-II interface. Any given vehicle will likely only implement one of the protocols. Often it is possible to make an educated guess about the protocol in use based on which pins are present on the J1962 connector:


  • SAE J1850 PWM (pulse-width modulation - 41.6 kbaud, standard of the Ford Motor Company)
    • pin 2: Bus+
    • pin 10: Bus–
    • High voltage is +5 V
    • Message length is restricted to 12 bytes, including CRC
    • Employs a multi-master arbitration scheme called 'Carrier Sense Multiple Access with Non-Destructive Arbitration' (CSMA/NDA)
  • SAE J1850 VPW (variable pulse width - 10.4/41.6 kbaud, standard of General Motors)
    • pin 2: Bus+
    • Bus idles low
    • High voltage is +7 V
    • Decision point is +3.5 V
    • Message length is restricted to 12 bytes, including CRC
    • Employs CSMA/NDA
  • ISO 9141-2. This protocol has a data rate of 10.4 kbaud, and is similar to RS-232. ISO 9141-2 is primarily used in Chrysler, European, and Asian vehicles.
    • pin 7: K-line
    • pin 15: L-line (optional)
    • UART signaling (though not RS-232 voltage levels)
    • K-line idles high
    • High voltage is Vbatt
    • Message length is restricted to 12 bytes, including CRC
  • ISO 14230 KWP2000 (Keyword Protocol 2000)
    • pin 7: K-line
    • pin 15: L-line (optional)
    • Physical layer identical to ISO 9141-2
    • Data rate 1.2 to 10.4 kbaud
    • Message may contain up to 255 bytes in the data field
  • ISO 15765 CAN (250 kbit/s or 500 kbit/s). The CAN protocol is a popular standard outside of the US automotive industry and is making significant in-roads into the OBD-II market share. By 2008, all vehicles sold in the US will be required to implement CAN, thus eliminating the ambiguity of the existing five signalling protocols.
    • pin 6: CAN High
    • pin 14: CAN Low

Note that pins 4 (battery ground) and 16 (battery positive) are present in all configurations. Also, ISO 9141 and ISO 14230 use the same pinout, thus the connector shape does not distinguish between the two.

더욱자세한 정보는 http://en.wikipedia.org/wiki/On-Board_Diagnostics#OBD-I 을 참고바랍니다.


참고2)

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