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故障现象一辆奔驰S350车,底盘号为WDD221182,装配276发动机,行驶里程约为4.7万km,因驾驶人侧座椅不能加热而进厂检修。故障诊断接车后首先试车验证故障现象,接通驾驶人侧座椅加热开关,指示灯正常点亮,等待一段时间,发现靠背加热正常,但座垫却不能正常加热。连接故障检测仪对车辆进行快速测试,得到1个当前故障代码“左前座垫加热垫存在功能故障低于电流极限值”。根据故障代码的提示,维修人员首先检查了驾驶人侧
Symptom A Mercedes-Benz S350 car chassis number WDD221182, 276 engine assembly, mileage of about 47,000 km, because the driver side seat can not be heated into the plant overhaul. Troubleshooting After the car first test run to verify the fault phenomenon, turn on the driver side seat heating switch, the light is lit normally, wait for a period of time, found back to normal heating, but the seat cushion can not be normal heating. Connect the fault detector to quickly test the vehicle and get a current fault code “The left front cushion heater has a functional fault below the current limit ”. According to the fault code prompt, the maintenance staff first checked the driver side