Yamaha MIO Service Manual page 296

3. Fuel level gauge
• Set the main switch to "ON".
• Move the float up 1 or down 2.
• Check that the fuel level gauge needle
moves to "F" or "E".
NOTE:
_
Before reading the fuel level gauge, leave the
float in one position (either up or down) for at
least three minutes.
1
2
• Does the fuel level gauge needle move
appropriately?
YES
4. Wiring
Check the entire signaling system's wiring.
NO
Replace the meter
assembly.
SIGNALING SYSTEM
7 - 42
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ELEC