Sym Mio 50 Service Manual page 187

16. Electrical Equipment
Charging Voltage/Current Inspection
Digital voltmeter
Fuse connector
Caution
Before conducting the inspection, be sure
that the battery is fully charged. Use a fully
charged battery having a voltage larger than
13.0 V. If undercharged, the current may
change dramatically.
While starting the engine, the starter motor
draws large amount of current from the
battery. Thus, do not start the engine with
battery.
After the engine is warmed up, replace original
battery with a fully charged battery.
Connect a digital voltmeter to the battery
terminals.
Connect an ammeter between both ends of the
main fuse.
Caution
When the probe is reversibly connected, use
●
a voltmeter having an indication that the
current flows from the positive or the negative
direction and the measurement should be at
zero, ammeter at one direction only.
Caution
Do not uses short-circuit cable.
●
It is possible to measure the current by
●
connecting an ammeter between the battery
positive terminal and the cable position
terminal, however, while the starter motor is
activated; the surge current of the motor
draws from the battery may damage the
ammeter. Use the foot lever to start the
engine.
The main switch shall be turned to OFF
●
position during the process of inspection.
Never tamper with the ammeter and the
cable while there is current flowing through. It
may damage the ammeter.
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Connect a tachometer.
Turn on the headlamp to high beam and start the
engine.
Accelerate the engine gradually to the specified
Ammeter
revolution per minute and measure the charging
voltage/current.
Specified Charging Current:
(Headlamp OFF) 0.6A or more / 2500rpm
(Headlamp ON) 0.4A or more/2500rpm
Control Charging Voltage:
●
The following problems are related to the charging
system; follow the instructions provided in the
checking list to correct it if any one of the problems
takes place.
(1) The charging voltage can not exceed the
(2) The charging voltage and current are too
The following problems are not related to the
charging system; correct it if any by following
steps indicate in the checking list.
(1) The standard charging voltage and current
(2) The charging voltage is normal, but the
(3) The charging current is normal, but the
1.2 A or more / 6000 rpm
1.0 A or more / 6000 rpm
HU10U/W 13.5±0.5V / 1800 rpm
HU05U 13.8±0.5V / 2000 rpm
Caution
To replace the old battery, use a new battery
with the same current and voltage.
voltage between two battery terminals and
the charging current is in the discharging
direction.
much higher than the standard values.
can only reach when the revolution of the
engine exceeds the specified rpm.
Bulbs used exceed their specified watt
-
and consume too much power.
The replacement battery is aged and
-
does not have enough capacity.
current is not.
The replacement battery is aged and
-
does not have enough capacity.
Battery does not have enough electricity
-
or is over charged.
The fuse of the ammeter is blown.
-
The ammeter is improperly connected.
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voltage is not.
The fuse of the voltmeter is blown.
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