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.ion duration and controls the ignition timing using the
information of engine coolant temperature to avoid engine stalling and
improve drivability.
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.

Other information:
Replacement
1.
Remove the handle cover (B) by pushing the button (A) located
in the lower part of the handle cover using a key or flat head
screwdriver.
2.
Remove the plug hole (B).
3.
After loosening the mounting bolt, remove the front door lock (A).
Tightening torque :
6.9 ~ 10 ...
Replacement
1.
Remove the front door window glass.
(Refer to Front Door - "Front Door Window Glass")
2.
Remove the front door outside handle.
(Refer to Front Door - "Front Door Outside Handle")
3.
Loosen the front door outside handle base mounting bolt (A).
4.
Disconnect the outsi ...