Toyota 2012 Highlander Owner's Manual page 396

3-7. Other interior features
Seat heaters
Driver's seat
Front passenger's seat
■
The seat heaters can be used when
Vehicles without smart key system
The engine switch is in the "ON" position.
Vehicles with smart key system
The "ENGINE START STOP" switch is in IGNITION ON mode.
■
When not in use
Turn the knob fully counterclockwise. The indicator light turns off.
Press the knob into the recessed position.
420
∗
Pops the knob out
On
The indicator light comes on.
Adjusts the seat tempera-
ture
The further you turn the knob
clockwise, the warmer the seat
becomes.
∗
: If equipped