3.2.1 Battery cable and no sensor connected
In this case the microphone (junction box on the power cable of the red and
black clamps) must be placed inside the engine compartment, ideally near
the engine head.
The tool must be turned on while the engine is on and running at idle, with
some loads on (for example, lights, fan at its maximum speed, heated rear
window, etc).
The initialization phase lasts for about 12-15 seconds, at the end of which
the tool switches to measurement mode and turns on the green LED to
indicate that it is ready to carry out the operations requested and provide
engine rpms.
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