Hyundai Santa Fe: Engine Control System / Engine Coolant Temperature Sensor (ECTS). Description and operation
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 whose resistance changes 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...
Specification
Temperature [°C (°F)]
Resistance (kΩ)
-40 (-40)
41.74 - 54.54
-30 (-22)
23...
Other information:
When all the conditions are satisfied, the Vehicle Auto-Shut Off operates and
turns the engine off automatically after 60 minutes.
A timer appears on the instrument cluster 30 minutes before vehicle shut off.
Resetting cluster timer
To reset the cluster timer, do one of following:
Release the accelerator pedal or brake pedal after Vehicle Auto-Shut
Off is complete...
1. Driver’s front air bag
2. Passenger’s front air bag
3. Side air bag
4. Curtain air bag
The vehicles are equipped with a Supplemental Air Bag System for the driver’s
seat and front passenger’s seats.
The front air bags are designed to supplement the three-point seat belts...
Categories

1. Inside door handle
2. Power window switches
3. Power window lock button/Electronic child safety lock button
4. Side view mirror folding button
5. Side view mirror control switch
6. Central door lock switch
7. Instrument panel illumination control switch
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