Inspecting Regulated Voltage (Ic Regulator Integral Type); Inspecting Output (A Built-In Ic Regulator Type) - Mitsubishi Heavy Industries SL Series Service Manual

ELECTRICAL SYSTEM
1.2.3 Inspecting regulated voltage
(IC regulator integral type)
(1) Disconnect (+) battery terminal and connect an
ammeter across the line.
(2) Connect a voltmeter between terminal L and ground.
(3) The indication of the voltmeter must be 0 when the
starter switch is OFF.
The indication of the voltmeter must be considerably
lower than the battery voltage when the starter switch is
ON (engine OFF).
(4) Start the engine with the ammeter terminals
disconnected.
(5) Read the voltmeter (regulated voltage) while the
ammeter reading is 5 A or lower, 2500 min
switches OFF.
Item
Regulated voltage (at 20°C [68°F])
1.2.4 Inspecting output
(a built-in IC regulator type)
(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)
12-4
R
-1
, and lamp
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
L
Voltmeter
V
Checking regulated voltage
Standard
5000 min
Ammeter
A
B
V Voltmeter
L
R
Inspecting regulated voltage
Standard
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