What is the reason for the speedometer not working?

1 Answers
SanSerenity
07/29/25 12:12pm
Most of the time, it is due to a damaged speed sensor, which requires repair. Below are some related extended information: 1. Speedometer: It actually consists of two gauges. One is the speedometer, and the other is the odometer. Traditional speedometers are mechanical. A typical mechanical odometer is connected to a flexible shaft, inside which there is a steel cable. The other end of the flexible shaft is connected to a gear in the transmission. The rotation of the gear drives the steel cable to rotate, which in turn rotates a magnet inside the speedometer's housing. 2. Odometer: The odometer is a digital instrument. It engages with the worm gear on the speedometer's drive shaft through the transmission gears of the counter drum, causing the counter drum to rotate. Its characteristic is that when the upper drum completes one full rotation, the lower drum rotates 1/10 of a turn. Like the speedometer, modern odometers also include electronic versions, which obtain mileage signals from speed sensors. The accumulated mileage data in electronic odometers is stored in non-volatile memory, allowing the data to be preserved even when there is no power.
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