Lexus ES300 (1997 year). Manual - part 294
Z03473
Ammeter
Disconnect Wire
from Terminal B
Battery
Voltmeter
B
Generator
P14228
Terminal F
CH–4
–
CHARGING
CHARGING SYSTEM
1008
1997 LEXUS ES300 (RM511U)
8.
INSPECT CHARGING CIRCUIT WITHOUT LOAD
HINT:
If a battery/generator tester is available, connect the tester to
the charging circuit as per manufacturer’s instructions.
(a)
If a tester is not available, connect a voltmeter and amme-
ter to the charging circuit as follows:
Disconnect the wire from terminal B of the genera-
tor, and connect it to the negative (–) tester probe
of the ammeter.
Connect the positive (+) tester probe of the amme-
ter to terminal B of the generator.
Connect the positive (+) tester probe of the voltme-
ter to terminal B of the generator.
Ground the negative (–) tester probe of the voltme-
ter.
(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: 10 A or less
Standard voltage: 13.2 – 14.8 V
If the voltmeter reading is more than standard voltage, replace
the voltage regulator.
If the voltmeter reading is less than standard voltage, check the
voltage regulator and generator as follows:
With terminal F grounded, start the engine and
check the voltmeter reading of terminal B.
If the voltmeter reading is more than standard volt-
age, replace the voltage regulator.
If the voltmeter reading is less than standard volt-
age, check the generator.
9.
INSPECT CHARGING CIRCUIT WITH LOAD
(a)
With the engine running at 2,000 rpm, turn on the high
beam headlights and place the heater blower switch at
”HI”.
(b)
Check the reading on the ammeter.
Standard amperage: 30 A or more
If the ammeter reading is less than the standard amperage, re-
pair the generator.
HINT:
If the battery is fully charged, the indication will sometimes be
less than standard amperage.