P0650 OBD-II：故障指示灯（MIL）控制电路 OBD-II故障代码P0650是什么意思？
OBD-II代码P0650被定义为故障指示灯（MIL）控制电路故障。
See_also: P0756 OBD II故障代码 发动机检查指示灯，技术上称为故障指示灯（MIL），其目的是提醒驾驶员车辆的排放控制系统出现故障，车辆正在污染空气。 只要车辆的污染水平超过美国环保署（EPA）规定的该年份、品牌和车型污染水平的150%或更高，该指示灯就会亮起。
代码 P0650 表示控制故障指示灯点亮的电路未能通过自检。 每次将钥匙插入点火开关并旋转到起动位置时，都会进行自检。 出现这种情况时，MIL指示灯应点亮，当发动机起动时，MIL指示灯应点亮1-3秒钟，然后熄灭。 在这段时间内，MIL指示灯应点亮。动力总成控制模块通过查看各种电压读数来检查MIL电路的性能。
有此故障代码的车辆应送至修理厂进行诊断。 查找修理厂
想了解更多信息？
PCM或动力传动控制模块在现代汽车中执行许多重要功能，例如管理排放控制系统、燃油系统、点火系统、变速器、防抱死制动系统和牵引力控制系统。
See_also: P0A4A OBD II故障代码 P0650 症状
- 发动机检查指示灯点亮
- 因MIL故障导致排放检查失败
- 在许多情况下，驾驶员不会注意到任何不利条件
触发P0650代码的常见问题
- PCM中的MIL驱动器故障
- MIL线束中的接线/连接有缺陷
- MIL接地电路故障
常见误诊
- 当根本原因是线路故障时，更换PCM
- 如果根本原因是仪表盘电路板故障，则更换PCM
P0650 车间和技术人员诊断理论
当诊断P0650代码时，重要的是记录冻结帧信息，然后在记录的冻结帧条件下通过试车重复代码设置条件。 仔细观察MIL命令和MIL实际的串行数据流PID值。 如果它们在任何时候不一致，那么您可能已经验证了问题。 我总是从仪表组中拆下灯泡，然后将灯泡从仪表组中取出。我这样做是因为问题的根源可能在仪表组本身。 扫描仪表组和 BCM 或车身控制模块的数据和代码是没有坏处的。 研究适用的接线图并验证 PCM 与仪表组和 MIL 插座之间是否存在良好的连续性。
Ronald Thomas
Jeremy Cruz is a highly experienced automotive enthusiast and a prolific writer in the field of auto repair and maintenance. With a passion for cars that dates back to his childhood days, Jeremy has devoted his career to sharing his knowledge and expertise with consumers who seek reliable and accurate information about keeping their vehicles running smoothly.As a trusted authority in the automotive industry, Jeremy has worked closely with leading manufacturers, mechanics, and industry experts to gather the most up-to-date and comprehensive knowledge in auto repair and maintenance. His expertise extends to a wide range of topics, including engine diagnostics, routine maintenance, troubleshooting, and performance enhancement.Throughout his writing career, Jeremy has consistently provided consumers with practical tips, step-by-step guides, and trusted advice on all aspects of auto repair and maintenance. His informative and engaging content allows readers to understand complex mechanical concepts easily and empowers them to take control of their vehicle's well-being.Beyond his writing skills, Jeremy's genuine love for automobiles and innate curiosity have driven him to constantly stay abreast of emerging trends, technological advancements, and industry developments. His dedication to informing and educating consumers has been recognized by loyal readers and professionalsalike.When Jeremy isn't immersed in automobiles, he can be found exploring scenic driving routes, attending car shows and industry events, or tinkering with his own collection of classic cars in his garage. His commitment to his craft is fueled by his desire to help consumers make informed decisions about their vehicles and ensure they have a smooth and enjoyable driving experience.As the proud author of the blog for the leading provider of auto repair and maintenance information to consumers, Jeremy Cruz continues to be a reliable source of knowledge and guidance for car enthusiasts and everyday drivers alike, making the road a safer and more accessible place for all.
