推荐回答（2个）
ECU的CAN总线故障，应该是ECU的CAN接口接触不良，建议去4S处理。
现代汽车仪表盘的面膜下制作了各式各样的指示灯或警报灯，例如冷却液液面警报灯、燃油量指示灯、清洗器液面指示灯、充电指示灯、远近光变光指示灯、变速器挡位指示灯、制动防抱死系统(ABS)指示灯、驱动力控制指示灯、安全气囊(SRS) 警报灯等。
CAN是控制器局域网络(Controller Area Network, CAN)的简称，是由以研发和生产汽车电子产品著称的德国BOSCH公司开发的，并最终成为国际标准（ISO 11898），是国际上应用最广泛的现场总线之一。 在北美和西欧，CAN总线协议已经成为汽车计算机控制系统和嵌入式工业控制局域网的标准总线，并且拥有以CAN为底层协议专为大型货车和重工机械车辆设计的J1939协议。
拓展资料：
错误处理：
在CAN总线中存在5种错误类型，它们互相并不排斥，下面简单介绍一下它们的区别、产生的原因及处理方法。
位错误:向总线送出一位的某个节点同时也在监视总线，当监视到总线位的电平和送出的电平不同时，则在该位时刻检测到一个位错误。但是在仲裁区的填充位流期间或应答间隙送出隐性位而检测到显性位时，不认为是错误位。送出认可错误标注的发送器，在检测到显性位时也不认为是错误位。
填充错误:在使用位填充方法进行编码的报文中，出现了第6个连续相同的位电平时，将检 测出一个填充错误。
CRC错误:CRC序列是由发送器CRC计算的结果组成的。接收器以和发送器相同的方法计算CRC。如果计算的结果和接收到的CRC序列不同，则检测出一个CRC错误。
形式错误: 当固定形式的位区中出现一个或多个非法位时，则检测到一个形式错误。
应答错误:在应答间隙，发送器未检测到显性位时，则由它检测出一个应答错误。
这种现象属于车辆自检模式，只要车辆没断电仪表盘和各种指示灯都会亮。
这种现象都属正常。
为保障车辆安全、可靠地运行，要使车辆经常处于良好的技术状况，符合机动车安全运行技术标准，除应对车辆进行定期的检修保养外，还应结合进行预防性的日常检查维护。由驾驶员在出车前、行驶途中、收车后三个阶段进行，重点是清洁、检查和补给燃润料。当您的车辆准备作长途行驶或您首次接任该车驾驶时，尤为需要进行出车前的检查工作，做到掌握车辆技术状况和熟悉车辆各操纵装置。
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