车上的OBD-II接口（母）： ELM327用到的引脚： 2: SAE-J1850 PWM和SAE-1850 VPW总线(+) 4. 车身接地 5. 信号接地 6. CAN high (ISO 15765-4和SAE-J2284) 7. ISO 9141-2和ISO 14230-4总线的K线 10. SAE-J1850 PWM协议总线(-) 14. CAN low (ISO 15765-4和SAE-J2284) 15. ISO 9141-2和ISO 14230-4总线的L线 16. 蓄电池电压 全部引脚定义： 1. Manufacturer discretion. GM: J2411 GMLAN/SWC/Single-Wire CAN. 2. Bus positive Line of SAE-J1850 PWM and SAE-1850 VPW 3. Ford DCL(+) Argentina, Brazil (pre OBD-II) 1997-2000, USA, 4. Chassis ground 5. Signal ground 6. CAN high (ISO 15765-4 and SAE-J2284) 7. K line of ISO 9141-2 and ISO 14230-4 8. - 9. - 10. Bus negative Line of SAE-J1850 PWM only (not SAE-1850 VPW) Europe, etc. Chrysler CCD Bus(+) 11. Ford DCL(-) Argentina, Brazil (pre OBD-II) 1997-2000, USA, Europe, etc. Chrysler CCD Bus(-) 12. - 13. 14. CAN low (ISO 15765-4 and SAE-J2284) 15. L line of ISO 9141-2 and ISO 14230-4 16. Battery voltage
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