1989-Mitsu-Factory Manual · Система зарядки · страница 8 из 17 · Открыть оригинал PDF ↗
(5) Connect a DC ammeter (0 to IOOA) in series
between the “B” terminal and the discon-
nected output wire. Connect the (+) lead of
the ammeter to the “B” terminal and connect
the (-1 lead wire to the disconnected output
wire.
NOTE
Tighten each connection by bolt and nut
securely as a heavy current will flow. Do not
relay on clips.
(6) Connect a voltmeter (0 to ZOV) between the
“B” terminal and ground. Connect the (+) lead
wire to the alternator “B” terminal and (-)
lead wire to a sound ground.
(7) Set the engine tachometer and connect the
battery ground cable.
(8) Leave the engine hood open.
Test
(1) Check to see that the voltmeter reads the
same value as the battery voltage.
If the voltmeter reads OV. an open circuit in
the wire between the alternator “B” 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 current
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: 35A min. 2.6L engine
52.5A min. 3.OL engine
Caution
1. 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. Therefore, 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 cur-
rent may not be obtained if the temper-
ature of the alternator itself or ambient
temperature 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 and voltmeter and
the engine tachometer.
(5) Connect the alternator output wire to the alter-
nator “B” terminal.
(6) Connect the battery ground cable.
1 TSB Revision
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