Ambient Air Temperature Sensor
The ambient air temperature sensor mounts underhood and can be affected by city traffic, by idling, and by restarting a hot engine. Therefore, the HVAC control module filters the value of the ambient air temperature sensor for temperature display. The ambient air temperature value is updated under the following conditions:
| Condition | Display |
|---|---|
| When the HVAC module A/C and RECIRCULATION buttons are pressed simultaneously. | Updates temperature display instantly |
| At start up with the engine off less than 2 hours | Displays last stored temperature unless temperature has decreased. The outside air temperature reading is always instantly updated if ambient air temperature has decreased. |
| At start up with the engine off more than 2 hours | Displays actual outside temperature |
| Vehicle speed above 32 km/h (20 mph) for a minimum of 80 seconds | Updates temperature display at a slow filtered rate |
| Sensor ambient temperature reading is less than the last displayed value | Displays actual outside temperature |
| When the ambient air decreases. | Updates temperature display rapidly |