Installation Instructions

B1700'B21 00'B2400 WSM, 11770
II Alternator
9 ELECTRICAL SYSTEM
Output Current
1. Disconnect the connector (2) from the alternator.
2. Connect the leads with the terminals as shown in the figures.
3. Start the engine and switch on all electrical loads (such as
head lights).
4. Set the engine speed at approx. 2250 rpm, and measure the
output current.
5. If the measurement is less than the factory specification, the
alternator is defective.
6. Run the engine at idling speed (low rpm) to see if the
ammeter reads a negative (-) value (discharge). Then
increase the engine rpm
to make sure the ammeter reads a
positive (
+) value (charge).
Alternator No-load Voltage
1. Disconnect the connector (2) from the alternator.
2. Connect the leads with the terminals as shown in the figures.
3. Start the engine and set its speed approx. 2250 rpm.
4. Disconnect the battery negative cord from the battery (5).
5. Measure the voltage across the alternator Bterminal and the
chassis.
6. If the measurement is less than the factory specification,
disassemble the alternator and check the
IC regulator.
B022F045
(1) Alternator
(2) Alternator 2P
Connector
IG
(RY)
(3) Bulb
(4) Main Switch
(5) Battery
(6) Load
Output current
Voltage
Factory spec.
Factory spec.
More than 40 A
14.2 to 14.8 V
(at 25°C, 77°F)
B022F044
(1) Alternator
(2) Alternator 2P
Connector
(3) Bulb
(4) Main Switch
(5) Battery
(6) Load
(Reference)
.. Once the engine has started, the alternator temperature
rises quickly up to an ambient temperature of 70 to 90°C (158
to 194 OF). As the temperature goes higher than 50°C
(122°F), the alternator voltage slowly drops; at higher than
100°C (212°F), it drops by about 1 V.
9-S15