故障现象一辆2004款丰田威驰轿车,接通点火开关后清洗泵便自动喷水,发动机起动后,喷水又会自行停止。故障分析丰田威驰轿车前风窗刮水器电路如图1所示,清洗泵电动机由点火开关提供15号电源,清洗器开关控制该电动机搭铁端。接通点火开关清洗泵就运转,说明清洗泵电动机端子1已经搭铁构成回路。发动机起动着机后,清洗泵喷水又能自行停止,说明搭铁端子又被重新断开。这样 Fault phenomenon A 2004 Toyota Vios sedan, connected to the ignition switch after the pump will automatically sprinkler, the engine starts, the water will stop on their own. Failure Analysis Toyota Vios front windshield wipers circuit shown in Figure 1, the washing pump motor ignition switch provides power supply 15, the washer switch control the motor side of the iron. Turn the ignition switch on the pump to run, indicating the cleaning pump motor terminal 1 has been formed by the ground circuit. After the engine is started, the pump can be stopped by itself, which means the ground terminals are disconnected again. such