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CHARGING SYSTEM
Test
1.
Check to see that the voltmeter reads the same value as the
battery voltage.
If the voltmeter reads QV, an open circuit in the wire be1ween
the alternator "S" terminal and battery (+) terminal, a blown
fusible link or poor grounding is suspected.
2.
Turn on the headlight switch and start the engine.
3.
Set the headlight at high beam and the heater blower switch
at HIGH, quickly increase the engine speed to 2,500 rpm and
read the maximum output current value indicated by the
ammeter.
NOTE:
After the engine start up, the charging currant quickly
drops. Therefore, above operation must be done quickly
to read maximum current value correctly.
Result
1.
The ammeter reading must be higher than the limit value.
If it is lower but the alternator output wire is normal, remove
the alternator from the vehicle and check it.
Limit value: 53A min
75A alternator
NOTE:
')
The nominal output current value is shown on the
nameplate affixed to the alternator body.
2)
The output current value changes with the electrical
load and the temperature of the alternator itself. There-
fore, the nominal output current may not be obtained
if the vehicle electrical load at the time of test is small.
In such a case, keep the headlights on to cause dis-
charge of the battery or use lights of another vehicle
as a load to increase the electrical load.
The nominal output current may not be obtained if the
temperature of the alternator itself or ambient temper-
ature is too high.
In such a case, reduce the temperature before testing
again.
2.
Upon completion of the output current test, lower the engine
speed to the idle speed and turn off the ignition switch.
3.
Disconnect the battery ground cable.
4.
Remove the test ammeter, voltmeter and the engine
tachometer.
5.
Connect the alternator output wire to the alternator "S" ter-
minal.
6.
Connect the battery ground cable.
27-7
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