Hyundai Veloster: 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.

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the IATS connector.
3.
Measure resistance between th ...
Specification
Temperature
Resistance (kΩ)
°C
°F
-40
-40
48.14
-20
-4
...
See also:
Vanity mirror lamp
Push the switch to turn the light on or off.
• : The lamp will turn on if this
button is pressed. • : The lamp will
turn off if this button is pressed.
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Non-operational conditions of rear parking assist system
The rear parking assist system may not operate properly when:
1. Moisture is frozen to the sensor. (It will operate normally when the moisture
has been cleared.) 2. The sensor is covered with forei ...
Components and Components Location
Component Location
1. Back view camera
2. LCD monitor
...