Hyundai Tucson: Engine Control System / Engine Coolant Temperature Sensor (ECTS) Description and Operation

Hyundai Tucson (LM) 2010-2015 Service Manual / Engine Control / Fuel System / Engine Control System / Engine Coolant Temperature Sensor (ECTS) Description and Operation

Description

Engine Coolant Temperature Sensor (ECTS) is located in the engine coolant passage of the cylinder head for detecting the engine coolant temperature. The ECTS uses a thermistor that changes resistance with the temperature.

The electrical resistance of the ECTS decreases as the temperature increases, and increases as the temperature decreases. The reference +5V is supplied to the ECTS via a resistor in the ECM. That is, the resistor in the ECM and the thermistor in the ECTS are connected in series. When the resistance value of the thermistor in the ECTS changes according to the engine coolant temperature, the output voltage also changes.

During cold engine operation, the ECM increases the fuel injection duration and controls the ignition timing using the information of engine coolant temperature to avoid engine stalling and improve drivability.

Intake Air Temperature Sensor (IATS) Repair procedures

Inspection 1. Turn the ignition switch OFF. 2. Disconnect the IATS connector. 3. Measure resistance between the IATS terminals 3 and 4. 4. Check that the resistance is within the speci ...

Engine Coolant Temperature Sensor (ECTS) Specifications

Specification TemperatureResistance (kx)°C°F-40-4048.14-20-414.13 ~ 16.830325.7920682.31 ~ 2.59401041.15601400.59801760.32 ...

Other information:

Hyundai Tucson (LM) 2010-2015 Owners Manual: Key ignition switch
WARNING NEVER turn the ignition switch to the LOCK or ACC position while the vehicle is in motion except in an emergency. This will result in the engine turning off and loss of power assist for the steering and brake systems. This may lead to loss of directional control and braking functi ...

Hyundai Tucson (LM) 2010-2015 Service Manual: Tire Repair procedures
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