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:
Troubleshooting
Troubleshooting
SymptomSuspect AreaReferenceLower pedal or spongy pedal1. Integrated Brake Actuation Unit (Air in)airВ·bleed2. AHB system (Fluid leaks)replace3. Piston seals in IBAU (Worn or dama ...
High Voltage Shut-off Procedures
High Voltage Shut-off Procedures
Be sure to read and follow the “General Safety Information
and Caution” before doing any work related with the high voltage
sys ...
Driving in flooded areas
Avoid driving through flooded areas unless you are sure the water is no higher
than the bottom of the wheel hub. Drive through any water slowly. Allow adequate
stopping distance because brake perf ...