The following statements pertain to the water temperature sensor and intake air temperature sensor. Select the statement that is True.Group of answer choicesWhen the circuit of the built-in thermistor opens, the sensor terminal voltage in the engine ECU becomes 0 V.The water temperature sensor is turned on when the coolant temperature becomes high.The intake air temperature sensor measures the density of the intake air.As the coolant or intake air temperature are low, the sensor terminal voltage in the engine ECU becomes high. Conversely, the sensor terminal voltage becomes low as temperature are high.
Question
The following statements pertain to the water temperature sensor and intake air temperature sensor. Select the statement that is True.Group of answer choicesWhen the circuit of the built-in thermistor opens, the sensor terminal voltage in the engine ECU becomes 0 V.The water temperature sensor is turned on when the coolant temperature becomes high.The intake air temperature sensor measures the density of the intake air.As the coolant or intake air temperature are low, the sensor terminal voltage in the engine ECU becomes high. Conversely, the sensor terminal voltage becomes low as temperature are high.
Solution
The statement that is true is: "As the coolant or intake air temperature are low, the sensor terminal voltage in the engine ECU becomes high. Conversely, the sensor terminal voltage becomes low as temperature are high."
This is because both the water temperature sensor and the intake air temperature sensor are types of thermistors, which are resistors that change their resistance value with changes in temperature. When the temperature is low, the resistance is high, which leads to a high voltage at the sensor terminal in the engine ECU. Conversely, when the temperature is high, the resistance is low, leading to a low voltage at the sensor terminal.
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