switch (1) idle and switch (2) Full load indicator shifters are actuated via a lever (manual drive control of the high pressure fuel pump).
If the engine speed is too high and the engine is not loaded, the control unit closes the current circuit to the LED. The LED flashes, showing the driver the opportunity to shift into a higher gear. The shift indicator is in the neutral position when the accelerator pedal is released (when driving downhill) and at maximum speed. This is provided by the corresponding sensors at the high pressure fuel pump and gearbox.
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