Mitsubishi Montero Sport (2004+). Manual - part 92
CHARGING SYSTEM
TSB Revision
ENGINE ELECTRICAL
16-9
WARNING
Battery posts, terminals and related acces-
sories contain lead and lead compounds.
WASH HANDS AFTER HANDLING.
1. Before the test, always be sure to check the
following.
• Generator installation
• Battery (Refer to GROUP 54A, Chassis Electrical
− Battery − On-vehicle Service − Battery Check
NOTE: The battery to be used should be slightly
discharged. 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 GROUP
00, General <Body and Chasis>
− Maintenance
Service
− 8. Drive Belt (For Generator and Water
Pump, Power Steering Pump) (Check Condition)
.)
• Fusible link
• Abnormal noise from the generator while the
engine is running
2. Turn the ignition switch to the "LOCK" (OFF)
position.
3. Disconnect the negative battery cable.
WARNING
Never use clips to connect the line. Loose
connections (e.g. using clips) will lead to a
serious accident because of high current.
4. Disconnect the generator output wire from the
generator "B" terminal and connect a DC test
ammeter with a range of 0
− 100 A in series
between the "B" terminal and the disconnected
output wire. (Connect the positive lead of the
ammeter to the "B" terminal, and then connect the
negative lead of the ammeter to the disconnected
output wire.)
NOTE: A clamp-type ammeter which enables
measurements 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 positive lead of the
voltmeter to the "B" terminal, and then connect the
negative lead of the voltmeter to the ground.)
6. Connect the negative battery cable.
7. Connect an engine tachometer or scan tool
MB991958.
8. Leave the hood open.
9. Check to be sure that the reading on the voltmeter
is equal to the battery positive 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 positive
terminal.
10.After turning the light switch on and turning on the
headlights, start the engine.
NOTE: Because the current from the battery will
soon drop after the engine is started, step11
should be carried out as quickly as possible in
order to obtain the maximum current output value.
11.Immediately after setting the headlights to high
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
Generator Specifications
NOTE: The current output value will depend on
the electrical load and the temperature of the gen-
erator body.
NOTE: If the electrical load is small 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 turned on for some time to discharge
the battery.
NOTE: The specified level of current also may not
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 "LOCK" (OFF)
position.
15.Disconnect the engine tachometer or scan tool
MB991958.
16.Disconnect the negative battery cable.
17.Disconnect the ammeter and voltmeter and
engine tachometer.
18.Connect the generator output wire to the
generator "B" terminal.
19.Connect the negative battery cable.