Why is the tachometer of the Verna not moving?

[DiGeorge]

The reasons why the Verna's tachometer is not moving are: 1. The flexible shaft connection is disconnected; 2. There is foreign matter stuck inside the meter preventing movement; 3. There is an issue with the dashboard; 4. Wiring problems; 5. The pointer has fallen off. The working principle of the tachometer is that it receives digital pulse signals, processes them, and directly reads them into the CPU's counting port. The software then calculates the speed and the corresponding position of the pointer, and through the CPU's control port, amplifies the signal to drive the stepper motor to rotate in both positive and negative directions. The Verna has a length of 4300mm, a width of 1705mm, a height of 1460mm, and a wheelbase of 2570mm. The car's engine has a maximum horsepower of 95Ps, a maximum power of 70kW, and a maximum torque of 132Nm.