8-S15
F2880, F3680, RCK72-F36, RCK72R-F36, RCK60-F36, RCK60R-F36, WSM
ELECTRICAL SYSTEM
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.
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.
W1020851
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.
W1021720
Voltage
Lead terminal -
Chassis
Approx. battery charge
Resistance
(Sensor terminal -
Chassis)
Reference value
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)
(1) Coolant Temperature Sensor (a) From Temperature Gauge
(1) Illumination Terminal
(2) G (Ground) Terminal
(3) S (Signal) Terminal
(4) B (Battery) Terminal
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