Car in front of the sensor of the important work of the car

In front of the sensor as an important member of automotive sensors play an important role in this , understand the car in front of the sensor on our usual car , car repair is helpful to understand the structure and function of the sensor , then we will soon find the problem in a timely manner Update the front sensor is installed in front of the sensor the sensor and the fender rear bumper , for sensing a signal collision speed . Around the front structure of the same two sensors , Cooling Temperature Sensor are eccentric weight . Sensor mounted in a sealed box in front of the sensor vibration protection has four pins, of which two pins connected to the electronic controller , the other two for the self-diagnostic pin. Metal resistance is the role of diagnosis between the sensor and the central controller is in an open state or in the normal state. In front of the sensor working principle is: normal driving , the torsion spring hammer , moving contacts set at TDC position , the sensor does not trigger signal to the central controller . When the car crash , the inertia to overcome the spring force and torque to produce movement , driven contacts rotation, so dynamic and static contact engagement . In this case, the sensor to the central controller happen "on" signal,Coolant Temperature Sensorconnected , so electronic controller sends electric detonators detonated belt pretensioners instruction , so that the seat belt tensioner to achieve security role.