Mitsubishi MOTORS 3000GT Bedienungsanleitung Seite 454

This test determines whether the generator outputs
normal current.
(1) Before the test, always be sure to check the
following.
Generator installation
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Battery (Refer to GROUP 54 - Battery.)
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NOTE
The battery to be used should be slightly dis-
charged. The load in a fully-charged battery
will be insufficient and the test may not be able
to be carried out correctly.
Generator drive belt tension (Refer to
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GROUP 11 - On-vehicle Service.)
Fusible link
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Abnormal noise from the generator while
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the engine is running
(2) Turn the ignition switch to the OFF position.
(3) Disconnect the negative battery cable.
(4) Disconnect the generator output wire from the
generator "B" terminal and connect a DC test
ammeter with a range of O-100 A in series
between the "B" terminal and the disconnected
output wire. (Connect the (+) lead of the amme-
ter to the "B" terminal, and then connect the
output wire.)
Caution
Never use clips but tighten bolts and nuts
to connect the line.
connections (e.g. using clips) will lead to
a serious accident because of high current.
NOTE
A clamp-type ammeter which enables measure-
ments to be taken without disconnecting the
generator output wire is recommended.
(5) Connect a voltmeter with a range of 0 - 20
V between the generator "B" terminal and the
ground. (Connect the (+) lead of the voltmeter
to the "B" terminal, and then connect the (-)
lead of the voltmeter to the ground.)
(6) Connect a tachometer. (For the procedure for
connecting the tachometer, refer to GROUP
11 - On-vehicle Service.)
(7) Connect the negative battery cable.
(8)
Leave the hood open.
(9) Check to be sure that the reading on the
voltmeter is equal to the battery voltage.
NOTE
If the voltage is 0 V, the cause is probably an
open circuit in the wire or fusible link between
the generator "B" terminal and the battery (+)
terminal.
ENGINE ELECTRICAL - Charging System
Otherwise loose
TSB Revision
the headlights, start the engine.
beam and turning the heater blower switch to
the high revolution position, increase the engine
speed to 2,500 r/min and read the maximum
current output value displayed on the ammeter.
Limit value: 70% of nominal current output
NOTE
For the nominal current output, refer to the
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Generator Specifications.
Because the current from the battery will
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soon drop after the engine is started, the
above step should be carried out as quickly
as possible in order to obtain the maximum
current output value.
The current output value will depend on
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the electrical load and the temperature of
the generator body.
If the electrical load is small while testing,
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the specified level of current may not be
output even though the generator is normal.
In such cases, increase the electrical load
by leaving the headlights turned on for some
time to discharge the battery or by using
the lighting system in another vehicle, and
then test again.
The specified level of current also may not
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be output if the temperature of the generator
body or the ambient temperature is too high.
In such cases, cool the generator and then
test again.
(12)The reading on the ammeter should be above
the limit value. If the reading is below the limit
value and the generator output wire is normal,
remove the generator from the engine and check
the generator.
(13)Run the engine at idle speed after the test.
(14)Turn the ignition switch to the OFF position.
the ammeter, voltmeter and
tachometer.
(17)Connect the generator output wire to the
generator "B" terminal.
(18)Connect the negative battery cable.