Kubota BX2370 Workshop Manual page 356

BX1870,BX2370,BX2670,LA203A,LA243A,RCK48(P),RCK54(P),RCK60B,RCK60D,RCK54D, WSM
Coolant Temperature Sensor (Thermo Unit)
1) Lead Terminal Voltage
1. Disconnect the lead from the coolant temperature sensor after
turning the main switch OFF.
2. Turn the main switch ON and measure the voltage with a
voltmeter across the lead terminal and the chassis.
If the voltage differs from the battery voltage, the wiring harness,
fuse or coolant temperature gauge is faulty.
Voltage Lead terminal – Chassis
2) Sensor Continuity
1. Measure the resistances with an ohmmeter across the sensor
terminal and the chassis.
2. If the reference value is not indicated, the sensor is faulty.
Resistance (Sensor Reference
terminal – Chassis) value
(1) Coolant Temperature Sensor
Hour Meter and Tachometer
1. Disconnect the 3P connector (4) from the IC regulator (9)
located in the alternator (5) after starting the engine.
2. Measure the voltage with a voltmeter across the hour meter
terminal (6) and the alternator body when the hour meter or
tachometer does not indicated the proper value.
3. If the measured voltages differ from the specified voltage, the
hour meter and tachometer is faulty.
Voltage while
Hour meter terminal –
engine runs at idling
Alternator body
speeds
(1) L (Blue) Lead
(2) RY (Red / Yellow) Lead
(3) WR (White / Red) Lead
(4) 3P Connector
(5) Alternator
(6) Hour Meter and Tachometer
Terminal
(7) Ground Terminal
(8) Charge Lamp Terminal
(9) IC Regulator
6-S24
ELECTRICAL SYSTEM
Approx. battery voltage
Approx. 16.1 Ω at 120 °C (248 °F)
Approx. 27.4 Ω at 100 °C (212 °F)
Approx. 51.9 Ω at 80 °C (176 °F)
Approx. 153.9 Ω at 50 °C (122 °F)
(a) From Temperature Gauge
9Y1210855ELS0044US0
Approx. battery voltage
A: To the Battery
B: To Hour Meter and Tachometer
C: To Main Switch
D: To Charge Indicator
9Y1210855ELS0045US0
KiSC issued 02, 2017 A