In-Vehicle Temperature Sensor
WARNING: This page is about a different car, the 2020 Jaguar XE and 2019 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 HVAC.
The HVAC uses the signal from the in-vehicle temperature sensor for control of the climate control assembly output temperatures, blower speed and air distribution.
The HVAC 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 HVAC adopts a default temperature of 25 °C (77 °F).