Malaguti DRAKON125 2022 Workshop Manual page 137

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Main fault diagnosis
Failure phenomenon
Speed indication
fault:
The speed number is
not displayed;
Large deviation of
indicated speed.
With speed and without mileage
increase indication
Engine speed indication fault
Oil level indication
fault:
There is oil, but no
indication;
There is no oil, but
indication.
Gear indication fault:
No gear indication;
Wrong gear
indication.
The water temperature alarm light is
always on
False alarm of voltage warning
lamp
The voltage warning lamp
cannot give an alarm
Instrument backlight does not light
up
Possible causes
The distance between speed sensor
and signal panel is too large;
Vehicle speed sensor failure;
Signal panel failure;
Instrument failure;
Poor wiring, open circuit or short
circuit.
Instrument failure.
Poor wiring or open circuit;
Instrument failure;
ECU failure.
Fuel sensor failure or float stuck;
Instrument failure;
Poor wiring, open circuit or short
circuit.
The moving contact spring fails;
The moving contact or gear switch
contact is worn;
Gear switch failure;
Instrument failure;
Poor wiring, open circuit or short
circuit.
Poor wiring or open circuit;
Instrument failure;
ECU failure.
Poor wiring or open circuit;
Instrument failure.
Poor wiring or open circuit;
Instrument failure;
32.0~36.0
30.0~34.0
25.7~31.7
23.0~27.0
2.05~24.5
Solutions:
Reduce the distance to 2mm;
Replace the speed sensor;
Replace the signal panel;
Replace the instrument;
Replug or repair.
Replace the instrument.
Re-plug or repair;
Replace the instrument;
Replace ECU.
Replace the fuel sensor;
Replace the instrument;
Replug or repair.
Replace the spring;
Change the moving contact or
gear switch;
Change the gear switch;
Replace the instrument;
Replug or repair.
Re-plug or repair;
Replace the instrument;
Replace ECU.
Re-plug or repair;
Instrument failure.
Re-plug or repair;
Replace the instrument;