In order to achieve a subtle effect of the displayed outdoor ambient temperature, the displayed value does not instantaneously follow the temperature sensor measurement. Display will not change faster than 4°F per minute. This concept applies to both falling and rising temperatures. A programming strategy is also implemented to avoid incorrect readings on parked vehicles, as the temperature sensor is affected by external influences such as radiant heat from the engine compartment, increased road surface temperature, etc. Incorrect readings are avoided through the following logic:
- After turning on the ignition, the temperature change is only displayed after 30 seconds for a stationary vehicle (vehicle speed = zero and engine is turned off).
- Only when the vehicle is traveling faster than 12 mph are the increased temperature values displayed for the first three miles.
- If the measured ambient temperature is above the displayed value but drops, the display does not change.
- When the coolant temperature reaches 104° F and the speed drops below 12 mph, only the drop in the ambient temperature value is displayed. For example, in stop-and-go traffic when vehicles frequently go below 12 mph, it may take a few moments before the displayed temperature is correct.
If the above conditions are noted during this typical driving scenario, the sensor is fine and does not need to be replaced.
The AUDI Outdoor Temperature Reading Post appears for the first time on Imported Cars.
