In-Vehicle Temperature Sensor
WARNING: This page is about a different car, the 2018 Jaguar XE and 2017 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
The in-vehicle temperature sensor is a NTC thermistor installed behind an integral grill. A motor within the sensor draws air in through the grill and over the thermistor. The power supply and ground connections for the motor is provided by the ATCM.
The 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 supplies the in-vehicle temperature sensor with a 5 V 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 25 °C (77 °F).