2013 Toyota Highlander Owners Manual - Page 435
2013 Toyota Highlander Manual
Page 435 highlights
3 -8 . Ot he r int e rior fe a t ure s Se at he at e rs ∗ Driver's seat Pops the knob out On The indicator light comes on. Adjusts the seat temperature Front passenger's seat The further you turn the knob clockwise, the warmer the seat becomes.