Car speed sensor function: The inductive speed sensor is matched with the pulse disk to provide engine speed information and crankshaft top dead center information in the distributorless ignition system. This article refers to the address: http:// Sensor pin definition: 1#19# grounding (shield); 2#48# grounding; 3#49# sensor signal output Automobile speed sensor failure detection principle Used in conjunction with a pulse disk. The pulse disk is a toothed disk that originally had 60 teeth but has two tooth vacancies. The pulse disk is mounted on the crankshaft and rotates with the crankshaft. When the tip of the tooth passes next to the end of the sensor, the pulse disk made of ferromagnetic material cuts the magnetic line of the permanent magnet in the sensor, generates an induced voltage in the coil, and outputs it as a rotational speed signal. Simple measurement method: 1. When the engine cannot start, connect the engine diagnostic instrument and check whether the speed parameter is normal when the motor is started. 2. (Remove the connector) Turn the digital multimeter to the ohm file. The two test leads are connected to the sensors 2# and 3# pins. The rated resistance is 860 Ω ± 10% at 20 °C. 3. (Connect the connector) Put the digital multimeter to the DC voltage file. The two test leads are connected to the sensors 2# and 3# pins respectively to start the engine. At this time, there should be voltage output. (It is recommended to check with the vehicle oscilloscope) Observe the output voltage with the vehicle oscilloscope. The waveform should be observed, and the peak-to-peak value and frequency of the output waveform should increase as the engine speed increases. 4. The diagnostic instrument specified by the OEM is used to communicate with the ECU of the EFI system to read the fault data in the ECU, so that the failure of the sensor can be judged. To use the 1.25mm Ribbon Connector, you will need to first ensure that the ribbon cable is properly aligned with the connector. The pins on the connector should be lined up with the corresponding holes on the ribbon cable. Once the cable is properly aligned, you can then insert the connector into the corresponding socket on the device. 1.25Mm Ribbon Connector,Pressure Terminal Connectors,Pressure Terminal Connector,Pressure Connectors YUEQING WEIMAI ELECTRONICS CO.,LTD , https://www.weimaiwafer.com
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