Justy Hatchback 2WD L3-1.2L SOHC (MPFI) (1992)
/Page-459001.png)
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
Coolant Temperature Sensor
PURPOSE
The coolant temperature sensor reports engine temperature to the ECU. Temperature information is used to properly compute air/fuel and ignition
configurations.
LOCATION
The sensor is threaded into the water jacket on the bottom side of the intake manifold.
CONSTRUCTION
The sensor is constructed of a thermistor element in a sealed capsule, with an electrical connector.
OPERATION
Water temperature data is sent to the ECU whenever the ignition is on. Changes in sensor temperature alter the thermistor resistance. When a
known voltage is passed through the sensor, the output voltage is dependant upon the resistance off the sensor.
