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Home >> Land Rover >> 2018 >> Range Rover Velar Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Electronic Engine Controls - TDV6 3.0L Diesel -- Range Rover Velar/L560) >> Electronic Engine Controls - TDV6 3.0L Diesel >> Description And Operation >> Electronic Engine Controls - TDV6 3.0L Diesel (G2006315) >> Description >> Ambient Air Temperature Sensor

Ambient Air Temperature Sensor

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G11608570Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

The Ambient Air Temperature (AAT) sensor is a Negative Temperature Coefficient (NTC) thermistor that allows the Powertrain Control Module (PCM) to monitor the temperature of the air around the vehicle. The PCM uses the AAT input for a number of functions, including engine cooling fan control. The PCM also transmits the ambient temperature on the FlexRay bus to the Body Control Module/Gateway Module (BCM/GWM) for use by other control modules.

The AAT sensor is installed in the left door mirror, with the bulb of the sensor positioned over a hole in the bottom of the door mirror casing.

The PCM supplies the sensor with a 5V reference voltage and a ground, and translates the return signal voltage into a temperature.

If there is a fault with the AAT sensor, the PCM adopts a default ambient temperature of 20°C (68°F).

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