Toyota 2015 Corolla Owner's Manual page 378

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6-4. Other interior features
Outside temperature display
The temperature display shows temperatures within the range of -40 F
(-40 C) to 122 F (50 C).
Type A
Type C
The outside temperature is displayed when
■
Vehicles without a smart key system
The engine switch is in the "ON" position.
Vehicles with a smart key system
The engine switch is in IGNITION ON mode.
Display
■
In the following situations, the correct outside temperature may not be dis-
played, or the display may take longer than normal to change.
When the vehicle is stopped, or moving at low speeds (less than 9 mph [15
●
km/h]).
When the outside temperature has changed suddenly (at the entrance/exit
●
of a garage, tunnel, etc.)
When "-- F" is displayed
■
The system may be malfunctioning. Take your vehicle to your Toyota dealer.
COROLLA_TMMMS_TMMC_U (OM12F00U)
Type B
Type D