ENGINE ELECTRICAL
-
Charging
Svstem
16-9
REGULATED VOLTAGE TEST
\:
b
Ignition
switch
(IGl)
Generator
This test determines whether the voltage regulator
is correctly controlling the generator output voltage.
(1) Always be sure to check the following before
the test.
l Generator installation
l
Check to be sure that the battery installed
in the vehicle is fully charged. (Refer to
GROUP 54
-
Battery.)
l Generator drive belt tension (Refer to
GROUP 00
-
Maintenance Service.)
l Fusible link
l Abnormal noise from the generator while
the engine is running
(2) Turn the ignition switch to the OFF position.
(3) Disconnect the negative battery cable.
(4) Connect a digital-type voltmeter between the
generator
“S”
terminal and the ground. (Connect
the
(+)
lead of the voltmeter to the
“s”
terminal,
and then connect the
(-)
lead of the voltmeter
to a secure ground or to the battery (-) terminal.)
(5) Disconnect the generator output wire from the
generator
“B”
terminal.
(6) Connect a DC test ammeter with a range of
O-100A
in series between the
“B”
terminal and
the disconnected output wire. (Connect the
(+)
lead of the ammeter to the
“B”
terminal,
and then connect the
(-)
lead of the ammeter
to the disconnected output wire.)
(7) Connect a tachometer. (Refer to GROUP 11
-
On-vehicle Service.)
(8) Reconnect the negative battery cable.
VOLTAGE REGULATION TABLE
Ammeter
-
Load
6EN1029
(9) Turn the ignition switch to the ON position and
check that the reading on the voltmeter is equal
to the battery voltage.
NOTE
If the voltage is 0 V, the cause is probably an
open circuit in the wire or fusible link between
the generator
“S”
terminal and the battery
(+)
terminal.
(1O)Check
to be sure that all lights and accessories
are off.
(11) Start the engine.
(12)lncrease the engine speed to 2,500
r/min.
(13)Read
the value displayed on the voltmeter when
the current output by the generator becomes
10A
or less.
(14)lf the voltage reading conforms to the value
in the voltage regulation table, then the voltage
regulator is operating normally.
If the voltage is outside the standard value,
there is a malfunction of the voltage regulator
or of the generator.
(15)After
the test, lower the engine speed to the
idle speed.
(16)Turn the ignition switch to the “OFF” position.
(17)Disconnect
the negative battery cable.
(18)Disconnect
the ammeter, voltmeter and
tachometer.
(19)Connect the generator output wire to the
generator
“B”
terminal.
(20)Connect the negative battery cable.
Inspection
terminal
Terminal
“S”
Voltage
regula-
Standard value Inspection
tor
ambient (V)
terminal
temperature
(“C
PI)
-20 (-4) 14.2-15.4
Terminal
“S”
20 (68)
13.9-14.9
TSB Revision
Voltage regula- Standard value
tor
ambient (V)
temperature
(“c
PI)
60 (140)
13.4-14.5
80 (176)
13.1-14.5
I
To Next Page
Loading...
