Air Temperature Sensor is used in fuel injector engine. The purpose of an air temperature sensor is to help
the computer to calculate the air density. A change of a temperature change the resistance in the sensor. Simply stated the higher the air temperature gets the less dense the air becoming.
As the air becomes less dense the computer know that it needs to lesson the fuel flow. If the fuel flow was not changed the engine would become rich possible losing power and consuming more fuel. The temperature sensor is generally located in the air inlet tube or the air box.
connect an ohmmeter to the terminals of the sensor. Suspend the sensor in the container of water to heat the sensor. Heat the water and check the temperature with a thermometer.
TEMPERATURE | RESISTANCE |
20 degree | 2.3 k ohms |
30 degree | 1.9 k ohms |
30 degree | 1.3 k ohms |
50 degree | 900 ohms |
60 degree | 600 ohms |
70 degree | 400 ohms |
Plot the resistance and temperature on the graph.
Does the sensor meet the manufactures specifications? why or why not?
Yes it meet manufactures specification, the resistance drop as the temperature increases , but does not look an accurate reading for this graph usually the graph look negative curve line.
What do you observe about your result of air coolant sensor?
The ECM need to adjust a verity of Justen based on temperature it is critical for proper operation of these sustain that engine reach operating temperature and the temperature is accurately signal to ECM. Fr the proper amount of fuel to be injected the ECM must know correct engine temperature.
The engine coolant temperature (ECT) sensor represent to change in engine coolant temperature by measuring coolant temperature. The ECM know the average temperature of the engine.
Better that is what i would expect from a NTC
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