KIA Niro: Engine Coolant Temperature Sensor (ECTS)
Specification
Description
Located in the engine coolant passage of the cylinder head, Engine Coolant
Temperature Sensor
(ECTS) detects the engine coolant temperature. The ECTS uses a thermistor with
resistance in
proportion to 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 frequency of fuel injection
and controls the
ignition timing using the information of engine coolant temperature to avoid
engine stalling and
improve drivability.
Circuit
Diagram
ECTS (Water Temperature Control Assembly)
Harness Connector
ECTS (EGR Cooler Tube)
Harness Connector
Engine Coolant Temperature Sensor (ECTS) Repair procedures
Inspection
- Switch "OFF" the ignition.
- Remove the ECTS
(Refer to "Removal"). - After immersing the thermistor of the sensor into engine coolant, measure resistance between the ECTS terminals 1 and 2.
- Check that the resistance is within the specification.
Removal
Engine Coolant Temperature Sensor (ECTS) (Water Temperature Control Assembly)
- Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
- Remove the air cleaner assembly.
(Refer to Engine Mechanical System - "Air Cleaner")
- Remove the purge control solenoid valve.
(Refer to Engine Control / Fuel System - "Purge Control Solenoid Valve (PCSV)")
- Disconnect the engine coolant temperature sensor connector (A).
- Remove the spring clip (B), and then pull the sensor from the water temperature control assembly.
Warning
Note that engine coolant may flow out from the water temperature
control assembly when
removing the sensor.
Engine Coolant Temperature Sensor (ECTS) (EGR Cooler Tube)
- Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
- Remove the air cleaner assembly.
(Refer to Engine Mechanical System - "Air Cleaner")
- Disconnect the engine coolant temperature sensor connector (A).
- Remove the spring clip (B), and then pull the sensor from the water temperature control assembly.
Warning
Note that engine coolant may flow out from the water temperature
control assembly when
removing the sensor.
Installation
Warning
- Install the component to the specified torque.
- 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 it.
- Install in the reverse order of removal.
- Replenish the engine coolant.
(Refer to Engine Mechanical System - "Coolant")
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Crankshaft Position Sensor (CKPS)
Specification
Crankshaft Position Sensor (CKPS) Description and operation
Description
Crankshaft Position Sensor (CKPS) is one of the most important sensors of the
engine control system
that detects the crankshaft position. Lack of CKPS sig
Camshaft Position Sensor (CMPS)
Description
Camshaft Position Sensor (CMPS) is a hall sensor, which detects the camshaft
position by using a hall
element.
It is related with Crankshaft Position Sensor (CKPS) and detects the piston
position of each cylinder
which cannot be
Knock Sensor (KS)
Specification
Knock Sensor (KS) Description and operation
Description
Knocking is a phenomenon characterized by undesirable vibration and noise
that can cause engine
damage. Knock Sensor (KS) is installed on the cylinder block and senses en
SEE MORE:
Main High Voltage Battery Temperature Sensor
Removal
Warning
Be sure to read and follow the "General Safety Information and
Caution" before doing any work
related with the high voltage system. Failure to follow the safety
instructions may result in
serious electrical in
Adjusting steering wheel angle and height
Adjusting the steering wheel angle and height- (Kia Niro EV only)
Operation
Pull the lock-release lever (1) down.
Adjust the steering wheel to the
desired angle (2) and height (3).
Pull the lock-release lever up.
Adjusting ste
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