Coolant Temperature Sensor; Function Description; Working Principle - Segway VILLIAN SSV Series Service Manual

ELECTRICAL SYSTEM

COOLANT TEMPERATURE SENSOR

Function Description

The coolant temperature sensor function is used to
monitor the temperature of the engine coolant,on the
one hand, the output signal enables the electronic
A
system to make a judgment on the working condition
of the engineon the other hand, the output signal to
the instrument allows the operator to directly judge the
working state of the engine by visual inspection.
The temperature sensor is generally installed on
the intake side of the engine block, and the cylinder
temperature sensor can be seen after disassembling the
cargo box (see A in the fi gure below).

working principle

B
The NTC thermistor is packaged in the temperature
sensor, and its resistance value changes with the change
of the ambient temperature, so that the small change in
the external temperature can be accurately and timely
measured. Measuring its output resistance can refl ect the
A C
temperature of the contacting medium. Among them, the
A and C terminals output signals to the electronic control
unit ECU, and the B terminal is suspended. The pin
defi nition is shown in the fi gure below.
【A】Connect the positive signal
【B】Hanging
【C】Connect to the negative pole of the signal
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