ELECTRICAL SYSTEM
B2420, WSM
9-M22
6. GAUGES
[1] FUEL LEVEL SENSOR
Fuel Level Sensor
The remaining fuel quantity is detected by the fuel
level sensor installed in the fuel tank and indicated on the
fuel gauge. For detection, a float and a resistor are used.
As the float (1) lowers, the resistance of the variable
resistor (2) varies. The relation between the amount of
fuel and the resistance is as follows.
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[2] COOLANT TEMPERATURE SENSOR
Coolant Temperature Sensor
The coolant temperature sensor is installed to the
cylinder head of engine, and its tip is in touch with the
coolant. It contains a thermistor (4) whose electrical
resistance decreases as the temperature increases.
Current varies with changes in the coolant
temperature, and the increases or decreases in the
current move the pointer of gauge.
9Y1210436ELM0019US0
F1/2E
1 to 5 Ω 27.5 to 37.5 Ω 103 to 117 Ω
(1) Float (2) Variable Resistor
Characteristics of Thermistor
Temperature Resistance
50 °C (122 °F) 148.8 Ω
80 °C (176 °F) 50.3 Ω
120 °C (248 °F) 16.0 Ω
170 °C (338 °F) 5.6 Ω
(1) Terminal
(2) Insulator
(3) Body
(4) Thermistor
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