Kubota D1803-CR-E4 - Coolant Temperature Sensor; Function of Coolant Temperature Sensor; Outline of Coolant Temperature Sensor; Structure of Coolant Temperature Sensor

3.20 Coolant temperature sensor
3.20.1 Outline of coolant temperature
sensor
The coolant temperature sensor detects the
temperature of the coolant inside the engine.
3.20.2 Structure of coolant temperature
sensor
The coolant temperature sensor is made up of a
thermistor and connector and the like.
(1) Thermistor
(2) Terminal THW
(3) T
erminal A-GND2
(4) +5V
(5) Engine ECU
(a) Coolant temperature sensor
3.20.3 Function of coolant temperature
sensor
The coolant temperature sensor detects the
temperature of the coolant inside the engine.
When
the
engine coolant temperature changes the
resistance of the thermistor at the tip of the sensor
changes.
Then the resistance of the thermistor changes, the
sensor output voltage changes.
The output voltage signal of the sensor is sent to the
engine ECU.
3.20.4 Specification of coolant temperature
sensor
Operating voltage 5 V
Output characteristics
(1) Voltage
(2) Resistance
(A)
Voltage (V) / Resistance
(kΩ)
(B) Temperature (℃ / ℉)
Temperature Resistance ( kΩ)
20 ℃
68 ℉
Approx. 2.5
40 ℃
104 ℉
Approx. 1.2
60 ℃
140 ℉
Approx. 0.58
80 ℃
176 ℉
Approx. 0.32
100 ℃
212 ℉
Approx. 0.18
MECHANISM
3. Fuel system 4. ENGINE
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
4-33
KiSC issued 12, 2018 A