Kubota RTV1140CPX, Workshop Manual

Page: 358 / 379

ELECTRICAL SYSTEM
RTV1140CPX, WSM
8-S15
No-Load Test
1. Connect the 2P connector (6) to previous positions of the
alternator after turning the main switch OFF .
2. Connect the jumper lead (3) between IG terminal (4) and B
terminal (2).
3. Start the engine and then set at idling speed.
4. Disconnect the negative cable from the battery.
5. Measure the voltage between the
B terminal (2) and the
chassis.
6. If the measurement is less than the factory specification,
disassemble the alternator and check the IC regulator.
(Reference)
• Once the engine has started, the alternator temperature rises
quickly up to an ambient temperature of 70 to 90 °C (158 to
194 °F). 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.
9Y1210293ELS0019US0
(8) Lighting System
Combination Switch (for Head Light)
1) Connector Terminal Voltage
1. Disconnect the connector from the combination switch (1) after
turning the main switch OFF .
2. Turn the main switch ON and measure the voltage with a
voltmeter across the connector terminal B1 (4) to the chassis.
3. If the voltage differs from the battery voltage, the wiring harness
or head light relay is faulty.
2) Switch Continuity
1. Disconnect the connector from the combination switch (1) and
remove it.
2. Measure the resistance with an ohmmeter across the switch
terminal B1 (5) to terminal I (6).
3. If the resistance differs from the factory specifications, the
combination switch is faulty.
9Y1210293ELS0020US0
Voltage Factory specification More than 14 V
(1) Voltmeter
(2)
B Terminal
(3) Jumper Lead
(4)
IG Terminal
(5) L Terminal
(6) 2P Connector
(7) Alternator
Voltage
Connector terminal B1
– Chassis
Approx. battery voltage
Resistance
Factory
specification
OFF Infinity
ON 0 Ω
(1) Combination Switch
(2) Connector (Switch Side)
(3) Connector (Harness Side) (4) Connector Terminal B1
(5) Switch Terminal B1
(6) Switch Terminal I
KiSC issued 05, 2014 A