What is the reason for the speedometer not displaying in the new Sylphy?

1 Answers
LincolnRose
07/30/25 10:17am
New Sylphy speedometer not displaying is likely due to a damaged sensor. The function of the car sensor: The speedometer uses the measurement signal from the speed sensor to calculate and display the vehicle's speed. There are two methods to calculate the speed: one is to count the number of pulses output by the sensor within a fixed time, and the other is to measure the time taken for a fixed pulse period. The pulse counting method works by the microprocessor detecting an increase in the number of pulses from the sensor signal, then starts counting the pulses representing the speed. After detecting the number of pulses over a preset time, the data in the counter is compared with the data in memory. If the difference reaches one kilometer per hour or more, the data in the counter is output to the display circuit to refresh the display value, and this entire process is continuously repeated. Reasons for car sensor failure:
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