Charging System Inspection; Charging Voltage Inspection - Honda Motorcycle Service Manual

BATTERIES/CHARGING/LlGHTlNG SYSTEM
The voltage regulation is performed by the high frequency
ONIOFF cycle of the alternator. When the DC voltage of the
output waveform is measured, the reading will always be
less than the specified peak voltage.
A broken wire in the field coil in this type of system will result
in insufficient alternator charging. If the ground wire of the
field coil is shorted t o ground (transistor shorted), the battery
will be overcharged.
CHARGING SYSTEM INSPECTION
I
CHARGING VOLTAGE INSPECTION
- -
.
battery voltage when the engine speed reaches around the
rpm that the charging starts, the charging is normal.
After warming up the engine, connect a voltmeter between
the battery terminals.
For models with no tachometer, connect an engine tachometer.
Turn the headlight ON (Hi beam) and start the engine.
Gradually increase the engine speed and measure the voltage
between the battery terminals.
If the voltaoe readino increases to the control voltaae from the
NOTE
DIGITAL MULTITESTER
The rpm which the charging starts vary depends on the
battery condition and/or load of the electrical com-
ponent(~)
If the battery voltage drops quickly or the battery eventually
dies out even if the charging is normal, it is likely the battery's
effective life span has passed.
For the following conditions, the problem is most likely related
to the charging system. Conduct the following inspection.
@Standard control voltage is not reached when the engine
speed increases.
Open or shorted circuit of the wire harness, poorly
connected connector.
-
Open or shorted circuit of the AC generator.
Faulty regulatorlrectifier.
The battery used is bad.
@
Control voltage greatly exceeds the standard value.
The battery used is bad or incorrect (the capacity is
underrated)
Faulty regulatorlrectifier.
The battery used is bad
@
Standard control voltage is reached when the engine speed
greatly exceeds the specified rpm. -
Excessive electric load due to the use of light bulbs beyond
the specified rating.
-
The battery used is bad.
1
NORMAL CHARGING
VOLTAGE
CONTROL
/------VOLTAGE
I
CHARGING START
I
ENGINE SPEED
ENGINE SPEED (rpm)
- ,
ABNORMAL CHARGING
VOLTAGE
$ 1
Date of Issue: March.1995
O
HONDA MOTOR CO.,LTD.