Sedona EX V6-3.5L (2002)
Engine - Coolant Temperature Sensor/Switch: Description and Operation
ECTS
Measure engine coolant temperature using NTC (Negative temperature coefficient) element. The thermistor resistance of NTC element decrease in
response to rise of temperature.
It's used in determination of basic fuel quantity and ignition timing at starting, determination of basic idle control duty at starting, fuel and cooling fan
control, and emission gas temperature modeling necessary for controlling emissions.
The measure at sensor malfunction is to take the initial intake air temperature as basic substitution value of coolant temperature and increase it up to
max. 110 °C in the interval of 0.5 sec in response to the quantity of air.
In case of the intake air temperature sensor malfunction, first take the substitution value of coolant temperature at 20 °C and increase it up to 110 °C in
the interval of 0.5 second by the air quantity.
In case of intake air temperature sensor malfunction during engine running, first determine a proper temperature before first finding the trouble cause,
and then increase it up to 110 °C in the interval of 0.5 second by the air quantity.
