CHARGING SYSTEM
TSB Revision
ENGINE ELECTRICAL
16-3
CHARGING SYSTEM
GENERAL DESCRIPTION
M1161000100328
The charging system charges the battery with the
generator output to keep the battery charged at a
constant level during varying electrical load.
OPERATION
Rotation of the excited field coil generates AC volt-
age in the stator.
This alternating current is rectified through diodes to
DC voltage having a waveform shown in the illustra-
tion at left.
The average output voltage fluctuates slightly with
the generator load condition.
When the ignition switch is turned on, current flows in
the field coil and initial excitation of the field coil
occurs.
When the stator coil begins to generate power after
the engine is started, the field coil is excited by the
output current of the stator coil.
The generator output voltage rises as the field cur-
rent increases and it falls as the field current
decreases. When the battery positive voltage (gener-
ator S terminal voltage) reaches a regulated voltage
of approximately 14.4 V, the field current is cut off.
When the battery positive voltage drops below the
regulated voltage, the voltage regulator regulates the
output voltage to a constant level by controlling the
field current.
In addition, when the field current is constant, the
generator output voltage rises as the engine speed
increases.
CHARGING SYSTEM DIAGNOSIS
M1161000700212
TROUBLESHOOTING HINTS
Charging warning light dose not go on when the ignition switch
is turned to ON, before the engine starts.
• Check the bulb.
AKX00183
VOLTAGE
TIME
APPROXIMATELY
14.4 V
AB
AK301527
GENERATOR
<2.4L ENGINE (FEDERAL AND CALIFORNIA - M/T)>
B
STATOR
COIL
CHARGING
WARNING
LIGHT
IGNITION
SWITCH
BATTERY
FIELD COIL
GENERATOR
<2.4L ENGINE (FEDERAL AND CALIFORNIA - A/T, CANADA),
3.0L ENGINE>
B
STATOR
COIL
ECM<M/T>
PCM<A/T>
ECM
CHARGING
WARNING
LIGHT
IGNITION
SWITCH
FIELD COIL
BATTERY
AB
G
S
L
FR
+
+
–
–
VOLTAGE REGULATOR
G
S
L
FR
VOLTAGE REGULATOR