Kia Optima: 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.
...
Engine Coolant Temperature Sensor (ECTS). Specifications
Specification
Temperature
Resistance (kΩ)
°C
°F
-40
-40
48.14
-20
-4
...
See also:
Front Hub / Knuckle. Components and Components Location
Components
1. Driveshaft nut
2. Brake disc
3. Hub
4. Wheel bearing
5. Snap ring
6. Dust cover
7. Knuckle
8. Driveshaft
...
Removal
1.
Turn the ignition switch OFF and disconnect the battery
negative (-) cable.
2.
Remove the intake manifold (Refer to “Intake And
Exhaust System” in EM gro ...
Battery replacement
When replacement is necessary, use the following procedure.
1. Using a screwdriver, loosen the screw on the backside of the transmitter then
use a thin tool to pry open the transmitter.
2. Disas ...