Toyota Land Cruiser 1988 Repair Manual page 273

CH-4
--
BattertL_
I
13.8-14.4
v
14 75
l"i! I
CHARGING SYSTEM -On-Vehicle Inspection
CH0553
CHOOOB
1 OA or Less
,o
20
I '
CH0175 CH0010
4. VISUALLY CHECK ALTERNATOR WIRING AND
LISTEN FOR ABNORMAL NOISES
(a) Check that the wiring is in good condition.
(b) Check that there are no abnormal noises from the
alternator while the engine is running.
5.
CHECK DISCHARGE WARNING LIGHT CIRCUIT
(a) Warm up the engine and turn it off.
(b) Turn off all accessories.
(c) Turn the ignition switch to "ON". Check that the
charge light is lit.
(d) Start the engine. Check that the light goes out.
If the light does come on and go off as specified, trou-
bleshoot the discharge light circuit.
6. INSPECT CHARGING CIRCUIT WITHOUT LOAD
NOTE:
If a battery I alternator tester is available, con-
nect 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 alter-
nator and connect the wire to the negative (-)
terminal of the ammeter.
• Connect the test lead from the positive ( +) ter-
minal of the ammeter to terminal B 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: 10 A or less
Standard voltage: 13.8- 14.4 V at 25"C (77"F)
If the voltage reading is not within standard voltage,
replace the IC regulator.