Hyundai Ioniq (AE): Engine Control System / Engine Coolant Temperature Sensor (ECTS). Repair procedures
| 1. | Turn the ignition switch OFF. |
| 2. | Remove the ECTS. (Refer to "Removal") |
| 3. | After immersing the thermistor of the sensor into engine coolant, measure resistance between the ECTS terminals 1 and 3. |
| 4. | Check that the resistance is within the specification. Specification : Refer to "Specification" |
|
Engine Coolant Temperature Sensor (ECTS) [Water Temperature Control Assembly]
| 1. | Turn ignition switch OFF and disconnect the negative (-) battery cable. |
| 2. | Remove the air cleaner assembly (Refer to Engine Mechanical System - "Air Cleaner") |
| 3. | Remove the purge control solenoid valve. (Refer to Engine Control System - "Purge Control Solenoid Valve (PCSV)") |
| 4. | Disconnect the engine coolant temperature sensor connector (A). |
| 5. | Remove the engine coolant temperature sensor after removing the fixing pin (B). 
| •
| Note that engine coolant may flow out from the water temperature control assembly when removing the sensor. |
|
|
| 6. | Fill with engine coolant. (Refer to Engine Mechanical System - "Coolant") |
Engine Coolant Temperature Sensor (ECTS) [EGR Cooler Tube]
| 1. | Turn ignition switch OFF and disconnect the negative (-) battery cable. |
| 2. | Remove the air cleaner assembly (Refer to Engine Mechanical System - "Air Cleaner") |
| 3. | Disconnect the engine coolant temperature sensor connector (A). |
| 4. | Remove the engine coolant temperature sensor after removing the fixing pin (B). 
| •
| Note that engine coolant may flow out from the EGR cooler tube when removing the sensor. |
|
|
| 5. | Fill with engine coolant. (Refer to Engine Mechanical System - "Coolant") |
| •
| Install the component with the specified torques. |
| •
| Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing. |
|
| •
| Apply the engine coolant to the O-ring. |
|
| •
| Insert the sensor in the installation hole and be careful not to damage. |
|
| 1. | Install in the reverse order of removal. Engine coolant temperature sensor installation : 29.4 - 39.2 N.m (3.0 - 4.0 kgf.m, 21.7 - 28.9 lb-ft) |
|
Circuit Diagram[Water Temperature Control Assembly][EGR Cooler Tube]
Other information:
DescriptionThe PTC (Positive Temperature Coefficient) heater is installed at the exit or the backside of the heater core.The PTC heater is an electric heater using a PTC element as an auxiliary heating device that supplements deficiency of interior heat source in highly effective hybrid engine.
System Block DiagramComponent Parts and Function Outline
Component part
Function
Vehicle-speed sensor, ESP/ABS Control ModuleConverts vehicle speed to pulse.VCUReceives signals from sensor and control switches.
