一位开尼桑面包车的司机反映,有一次在发动机运转时,不慎将钥匙拨至“起动”位置,听到剧烈的碰齿声,直至将钥匙拨回原位后,响声才停止。说明该车起动机驱动保护电路已不起作用。起动发动机进行检查,发动机顺利完成起动过程,运转正常。这说明起动机电磁开关、起动开关工作正常。在此过程中,观察磁场继电器也在工作,表明发电机与磁场继电器也正常。由此推断,问题出在起动安全继电器中的保护线 The driver of an open Nissan van reported that once the engine was in operation, he accidentally turned the key to the “start” position and heard the violent clatter until the key was turned back into place and the sound stopped. Description of the car starter drive protection circuit has no effect. Start the engine to check, the engine successfully completed the start-up process, normal operation. This shows starter solenoid switch, the start switch is working properly. In the process, observing the magnetic field relay is also working, indicating that the generator and the magnetic field relay are also normal. From this it can be concluded that the problem lies in starting the protection line in the safety relay