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16. Electrical Equipment
16-8
Charging Voltage/Current Inspection
Caution
y 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.
y 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.
Connect a tachometer.
Turn on the headlamp to high beam and start the
engine.
Accelerate the engine gradually to the specified
revolution per minute and measure the charging
voltage/current.
Specified Charging Current:
(Headlamp OFF) 0.6A or more / 2500rpm
1.2 A or more / 6000 rpm
(Headlamp ON) 0.4A or more/2500rpm
1.0 A or more / 6000 rpm
Control Charging Voltage:
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.
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
voltage between two battery terminals and
the charging current is in the discharging
direction.
(2) The charging voltage and current are too
much higher than the standard values.
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
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.
(2) The charging voltage is normal, but the
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.
(3) The charging current is normal, but the
voltage is not.
- The fuse of the voltmeter is blown.
Digital voltmeter
Ammeter
Fuse connector
To this chapter contents
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