Inspecting Regulated Voltage; Inspecting Output - Mitsubishi S3Q2 Service Manual

1.2.3

Inspecting regulated voltage

(1) Disconnect the battery (+) terminal, and connect an
ammeter.
(2) Connect a volt meter to terminal L ground line.
(3) Make sure that the volt meter indicates 0 when the
starter switch is OFF position.
Make sure that the volt meter indicates much lower
voltage than battery voltage when the starter switch is
ON position.
(4) Disconnect the terminal of ammeter, and start the
engine.
(5) Measure the adjusting voltage with volt meter.
Item
Regulated voltage (at 20°C [68°F])
1.2.4

Inspecting output

(1) Disconnect the battery ground cable.
(2) Connect B terminal of the alternator to the ammeter,
then connect the voltmeter between B terminal and
ground.
(3) Connect the battery ground cable.
(4) Start the engine.
(5) Immediately apply all loads such as lamps.
(6) Increase the engine speed and measure the maximum
output current at the specified alternator rotation speed
with the voltmeter indicated the specified value.
(7) If the measured value meets the standard, the output is
normal.
Item
Output characteristics
(when hot)
L
R
Spec
12 V - 50 A 14.4 to 15.0 V
Spec
Terminal voltage/current
13.5V / 33A or higher
12V - 50A
13.5V / 47A or higher
Switch
Voltmeter
V
Inspecting regulated voltage
Standard
5000 min
Ammeter
A
B
V Voltmeter
L
R
Inspecting output
Standard
ELECTRICAL SYSTEM
Ammeter
A
Battery
12V
Condition
-1
, 5A or lower, 20°C [68°F]
Charge
lamp
Battery
Switch
Alternator rotation speed
-1
2500 min
-1
5000 min
12-3