Cabin Temperature Sensor / Switch: Description and Operation

IN-VEHICLE TEMPERATURE SENSOR
The in-vehicle temperature sensor contains a thermistor, which measures the in-vehicle air temperature and sends that reading to the DATC module. An aspirator hose is connected between the heater core and evaporator core housing and the in-vehicle temperature sensor. The aspirator hose uses airflow through the heater core and evaporator core housing to create a Venturi-type suction to draw in vehicle air through the in-vehicle temperature sensor (across the thermistor). The in-vehicle temperature sensor is mounted to the RH lower portion of the instrument cluster finish panel.

IN-VEHICLE TEMPERATURE AND HUMIDITY SENSOR
The in-vehicle temperature and humidity sensor contains 2 thermistors, which separately measure the in vehicle air temperature and humidity and send those readings to the DATC module. An aspirator hose and elbow is connected between the heater core and evaporator core housing and the in-vehicle temperature and humidity sensor. The aspirator hose uses airflow from the heater core and evaporator core housing air stream to create a Venturi-type suction to draw in vehicle air through the in-vehicle temperature sensor and across the thermistors.