The speed at which the engine crankshaft rotates is shown by the tachometer. To do this, it receives ignition pulses from the ignition / injection control unit. They are summed up by the electronics in the device and, in prepared form, are transferred further to the measuring mechanism of the pointer device.
In case of malfunctions, check the corresponding wires. The defect may also be hidden in the printed circuit board of the instrument panel. The tachometer cannot be repaired by one's own means.
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