Mitsubishi MOTORS Eclipse 1997, Service Manual

Page: 359 / 540

16-8
Charging System
ENGINE ELECTRICAL
Engine (Non-turbo)>
This test determines if the generator output current
is normal.
Before testing, be sure to check the following:
l
Generator installation and wiring connec-
tions
l
Battery (Refer to GROUP 54 Battery.)
NOTE
The battery used should be slightly discharged.
The load needed by a fully-charged battery
is insufficient for an accurate test.
l
Generator drive belt tension (Refer to
GROUP 00 Maintenance Service.)
l
Fusible link
l
Abnormal noise from the generator while
the engine is running
Turn the ignition switch to the OFF position.
Disconnect the negative battery cable.
Disconnect the generator output wire from the
generator terminal. Connect a DC test am-
meter with a range of A in series between
the terminal and the disconnected output
wire. (Connect the lead of the ammeter
to the terminal. Connect the lead of
the ammeter to the disconnected output wire.)
Caution
Never use clips but tighten bolts and nuts
to connect the line. Otherwise loose connec-
tions (e.g. using clips) will lead to a serious
accident because of high current.
NOTE
An inductive-type ammeter which enables mea-
surements to be taken without disconnecting
the generator output wire is recommended.
Connect a voltmeter with a range of
between the generator terminal and the
ground. (Connect the lead of the voltmeter
to the terminal, and then connect the
lead of the voltmeter to the ground.)
Connect the negative battery cable.
Leave the hood open.
Check that the reading on the voltmeter is equal
to battery voltage.
NOTE
If the voltage is 0 the cause is probably
TSB Revision
an open circuit in the fusible link between
the generator “B” terminal and the battery
terminal.
(9) Start the engine, and turn the headlights on.
the to high beam, turn the
heater blower switch to High, increase the en-
gine speed to approx.
and read
the maximum. current output displayed on the
ammeter.
Limit: 70% of nominal current
NOTE
For the nominal current output, refer to the
G e n e r a t o r
Because the current from the battery will
soon drop after the engine is started,
(10) should be carried
as possible in order to obtain the maximum
current output” value,
The current output’ value will
the electrical load and the temperature of
the generator body.
If insufficient electrical load is used while
testing, 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
on with the engine off to discharge the bat-
tery before testing.
The specified level of current also may not
be output if the temperature of the genera-
tor body and/or ambient temperature is too
high. In such cases, allow the generator
to cool before testing.
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, replace the generator.
the engine at idle speed after the test.
the ignition switch to the OFF position.
the negative battery cable.
the ammeter and voltmeter.
the generator output wire to the gener-
ator terminal.
the negative battery cable.