2004 Toyota Prius Owners Manual - Page 193

The automatic air conditioning automatically maintains the set temperature. This air conditioning features automatic fan speed and air flow control which automatically selects the most suitable fan speed and air flow to control the temperature. The hybrid system must be in the "IG−ON" mode. CLIMATE: Push this button to display switches for automatic air conditioning controls. 27p005a NOTICE To prevent the battery from being discharged, do not leave the air conditioning on longer than necessary when the hybrid system is not operating. Air flow selection : In the beginning of the automatic air flow mode, air might be delivered. 181