2007 Toyota Corolla Owners Manual - Page 113

'07 Corolla_U (L/O 0608) Outside temperature display The displayed temperature ranges from −30_C (−22_F) up to 50_C (122_F). The key must be in the "ON" position. If an abnormality exists in the connection of the outside air temperature sensor, "−−" will appear on the display. If "−−" appears on the display, contact your Toyota dealer. There may be a case that "−−" appears momentarily when the ignition is quickly turned to "ON". It is normal if it goes out soon. 101 2007MY COROLLA from Oct. '06 Prod. (OM12B32U)