ENGINE COOLANT TEMPERATURE (ECT) SENSOR [SKYACTIV-G 2.5T]

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Purpose

•  Detects the engine coolant temperature as basic information for mainly determining the fuel injection amount.

Function

•  Indicates the resistance value according to the engine coolant temperature.

ECT sensor characteristic

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Construction

•  ECT sensor is located on the water outlet case.
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•  A thermistor has been adopted for the detection part of the ECT sensor.
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•  A thermistor is a resistor element in which changes in the electrical resistance is large against temperature change. Using this characteristic, the sensor detects the engine coolant temperature as a resistance value.

Operation

1.  The ECT sensor detects (1) the engine coolant temperature.

2.  The PCM detects (2) the engine coolant temperature by the voltage from the ECT sensor.

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Fail-safe

DTC No.

Fail-safe function
P0117:00
•  Fixes the water temperature for the engine control at 40 °C {104 °F}, and for the idle air control at 80 °C {176 °F}.
•  Operates the cooling fan (high speed rotation).
•  Inhibits the fuel cut control during shift change.
P0118:00
•  Fixes the water temperature for the engine control at 40 °C {104 °F}, and for the idle air control at 80 °C {176 °F}.
•  Operates the cooling fan (high speed rotation).
•  Inhibits the fuel cut control during shift change.
P111A:00
•  Limits intake air amount.