5.2.18. Sensor of temperature of cooling liquid (ECT)
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The sensor of temperature of cooling liquid is installed in a head of cylinders and controls temperature of cooling liquid and transmits ECU signal. As the sensor the thermoresistor which is sensitive to changes of temperature is used.
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Electric resistance of the thermoresistor decreases at increase in temperature. Determines temperature of the engine by the output tension of the ECU sensor and provides an optimum ratio of air and fuel during the operation of the cold engine.
Check
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- Remove the sensor from a head of cylinders.
- Heating a vessel with water and the sensor located in it, check its resistance.
Sensor of temperature of cooling liquid
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Temperature
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Resistance, kOhm
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– 20 °C
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14,13–16,83
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0 °C
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5,79
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20 °C
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2,31–2,59
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40 °C
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1,48
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60 °C
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0,586
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80 °C
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0,322
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Index of temperature of cooling liquid
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Temperature
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Resistance, Ohm
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60 °C
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125
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85 °C
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42,6–54,2
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110 °C
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22,1–26,2
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125 °C
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15,2
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- If resistance of the sensor differs from demanded, replace the sensor.
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Installation
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- Apply on a sensor carving THREEBOND TB 2403 sealant or equivalent.
- Screw the sensor and tighten it the moment given in the specification. Inhaling moment: 20–40 N • m.
- Connect the socket to the sensor.
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