Inspect Charging Circuit Without Load; Inspect Charging Circuit With Load - Toyota 3VZ–FE Troubleshooting Manual

CHARGING SYSTEM – ON–VEHICLE INSPECTION
6.

INSPECT CHARGING CIRCUIT WITHOUT LOAD

HINT: If a battery/generator tester is available, connect the
tester to the charging circuit as per manufacturer's instruc-
tions.
(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 generator and
connect it to the negative (–) lead of the ammeter.
Connect the positive (+) lead of the ammeter to terminal
B of the generator.
Connect the positive (+) lead of the voltmeter to terminal
B of the generator.
Ground the negative (–) lead of the voltmeter.
(b) Check the charging circuit as follows:
With the engine running from idle to 2,000 rpm, check the
reading on the ammeter and voltmeter.
Standard amperage:
10 A or less
Standard voltage:
14.0–15.0 V at 25 C (77 F)
13.5–14.3 V at 115 C (239 F)
If the voltmeter reading is more than standard voltage, re-
place the IC regulator.
If the voltmeter reading is less than standard voltage, check
the IC 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 voltage,
replace the IC regulator.
If the voltmeter reading is less than standard voltage,
check the generator.
7.

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
CH–7