【单选题】【消耗次数：1】
启动车辆时仪表报动力电池故障 动力电池高压断开故障，首先应（）
①
先检查前舱电器盒内动力电池低压供电保险是否熔断
②
先使用北汽新能源专用诊断仪读取故障码再进行下一部检查
③
先检查动力电池低压供电
④
先检测电源线是否有短路、断路现象
参考答案：
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