故障现象一辆2008款奇瑞A3轿车,刮水器开关在清洗挡时喷水泵不工作故障(刮水臂动作正常),刮水器开关在其他各挡时,刮水器工作均正常。故障诊断奇瑞A3轿车的汽车前风窗刮水器电路如图1所示。前风窗刮水电动机和喷水泵电动机均受控于前BCM(车身控制单元),前车身控制单元接收刮水器开关信号,并依据开关信号对刮水电动机和喷水泵电动机进行控 Trouble A 2008 Chery A3 sedan, wiper switch in the cleaning block pump does not work failure (wiper arm is operating normally), wiper switch in the other block, the wiper work are normal. Troubleshooting Chery A3 car front windshield wiper circuit shown in Figure 1. The front windshield wiper motor and the jet pump motor are controlled by the front BCM (body control unit), the front body control unit receives the wiper switch signal and controls the wiper motor and the pump motor according to the switch signal