Ambient temperature display temperature sensor, function - GF83.57-P-2119-01GI

Function 

The resistance of the ambient temperature display temperature sensor is dependent on the ambient temperature and speed. The current resistance value is sent via the CAN data bus to the AAC push-button control module (N22), which then slightly readjusts the set temperature.

The fact that the ambient temperature is dependent on the speed helps to prevent any excess temperature being sent to the AAC push-button control module (N22) when the car is at a standstill or traveling slowly, e.g. as induced by engine heat radiation.

When switching the ignition on or off and at speeds of less than 20 km/h the last measured temperature value is used.

At ignition OFF, the last ambient temperature used for the control operation is stored.