In-Vehicle Temperature Sensor
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, 2016 Land Rover Range Rover, 2015 Land Rover Range Rover, and 2014 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
The in-vehicle temperature sensor is a Negative Temperature Coefficient (NTC) thermistor installed behind a grill in the instrument panel, on the inboard side of the steering column. A motor driven fan in the sensor draws air through the grill and over the thermistor.
The Automatic Temperature Control Module (ATCM) uses the signal from the in-vehicle temperature sensor for control of the climate control assembly output temperatures, blower speed and air distribution.
The ATCM provides the in-vehicle temperature sensor with a 5v reference voltage and translates the return signal voltage into a temperature. If the in-vehicle temperature sensor develops a fault, the ATCM adopts a default temperature of 20 °C (68 °F).