Lexus 2013 IS250 Owner's Manual page 401


The heated steering wheel can be used when the engine switch is in IGNITION
ON mode.

The heated steering wheel will automatically turn off after about 30 minutes.
Seat heaters
Each time the switch is pressed, the
intensity of the seat heater changes
and the level indicator lights
(amber) light as follows:
Hi (3 segments lit)  Mid (2 seg-
ments lit)  Lo (1 segment lit) 
Off

The seat heaters can be used when the engine switch is in IGNITION ON
mode.

Seat heater timer control: The seat heater automatically switches from
HiMidLo. The switching timing differs depending on the temperature
inside the cabin etc. when the seat heater was operated.

The seat heater timer control can be turned on and off by pressing the seat
heater switches for the driver side and front passenger side at the same time
until a buzzer sounds. The buzzer will beep once when the seat heater timer
control is turned on and twice when it is turned off.
Seat ventilators
Each time the switch is pressed, the
intensity of the seat ventilator
changes and the level indicator
lights (green) light as follows:
Hi (3 segments lit)  Mid (2 seg-
ments lit)  Lo (1 segment lit) 
Off
The seat ventilators can be used when the engine switch is in IGNITION ON
mode.
IS250_EE(OM53B11E)
6-1. Using the air conditioning system
Type A
387
Type B
6