The voltmeter shows the battery voltage.
If the voltmeter shows a voltage of 12 to 16 V while the car is moving, then the battery is well charged. If the sensor constantly shows a voltage below 11 V and above 16 V, then the battery is discharged or there is a malfunction in the battery charging system. Contact specialists to check the system.
Caution: The sensor may show voltage less than 11 V for a short period of time when the engine is started. This is a normal phenomenon.
[The article is reprinted from a web resource: MitsubishiMan]