Toyota 4A-FE Repair Manual page 216

CHARGING SYSTEM - On-Vehicle Inspection
CH-5
from
Terminal
B
m
Ammeter
Disconnect~
w ·re
A<±) •
-
------,
Battery
Voltmeter
13.9 - 15.1
v
Voltmeter
'
' '
CH0732
Less than 10 A
Ammeter
Ct-10009 CH001 0
6. CHECK CHARGING CIRCUIT WITHOUT LOAD
HINT: If a battery/alternator tester is available, connect
the tester to the charging circuit according to the
manufacturer's instructions.
(a) If a tester is not available, connect a voltmeter and
ammeter to the charging circuit as follows:
• Disconnect the wire from terminal
B
of the alterna-
tor and connect the wire to the negative [-) ter-
minal of the ammeter.
• Connect the test lead from the positive
~+)
ter-
minal of the ammeter to terminal 8 of the alterna-
tor.
• Connect the positive
(+)
lead of the voltmeter to
terminal B of the alternator.
• Ground the negative (-) lead of the voltmeter.
(b) Check the charging circuit as follows:
With the engine running from idling to 2,000 rpm,
check the reading on the ammeter and voltmeter.
Standard amperage: Less than 10 A
Standard voltage: 13.9 - 15.1 V at 25°C (77°F)
13.5 - 14.3 Vat 115°C (239°F)
If the voltage reading is greater than standard voltage,
replace the IC regulator.
If the voltage reading is less than standard voltage, check
the IC regulator and alternator as follows:
• With terminal F grounded, start the engine and check
the voltage reading of terminal B.
• If the voltage reading is higher than standard voltage,
replace the IC regulator.
• If the voltage reading is less than standard voltage,
repair the alternator.