题目：吉利帝豪EV300驱动系统故障诊断维修方案目录1.问诊试车...................................................................................................................11.1车辆信息.........................................................................................................11.2故障现象.........................................................................................................12.故障原因分析...........................................................................................................12.1电机控制器故障码解读与判断......................................................................12.2电机控制器故障原因分析.............................................................................23.诊断流程方案设计及实施.......................................................................................23.1电机控制器故障诊断流程方案.....................................................................23.2维修方案实施.................................................................................................33.3电机控制器外观检查.....................................................................................33.4检查电机控制器低压插头.............................................................................63.5检查电机控制器常电供电.............................................................................73.6检查电机控制器接地.....................................................................................73.7检查电机控制器常电线路.............................................................................83.8检查电机控制器常电保险供电.....................................................................83.9检查电机控制器常电保险本身.....................................................................83.9检查电机控制器CAN-L线路.......................................................................93.10检查电机控制器CAN-H线路....................................................................93.11检查电机控制器IG电供电.......................................................................103.12检查电机控制器IG电线路.......................................................................104.修复验证.....