Kubota WSM F2880 Workshop Manual page 275

F2880, F3680, RCK72-F36, RCK72R-F36, RCK60-F36, RCK60R-F36, WSM
Coolant Temperature Sensor
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.
Lead terminal -
Voltage
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 terminal - Reference value
Chassis)
(1) Coolant Temperature Sensor
Fuel Gauge and Coolant Temperature Gauge Operation
1. Remove the front panel.
2. Turn the main switch to ON position. Measure the voltage with a
voltmeter across the B terminal (4) and G terminal (2) of the
gauge.
3. If approx. battery voltage is indicated, the ignition and ground
lead connections are good.
4. Turn the main switch to OFF position. Connect a jumper lead
between S terminal (3) and G terminal (2) of the gauge.
5. Turn the main switch to ON position. If the gauge registers a full
scale reading under those conditions, the gauge is good. If less
than full scale reading is indicated, the gauge is defective and
should be replaced.
(1) Illumination Terminal
(2) G (Ground) Terminal
8-S15
ELECTRICAL SYSTEM
Approx. battery charge
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
W1020851
(3) S (Signal) Terminal
(4) B (Battery) Terminal
W1021720
KiSC issued 04, 2006 A