Toyota TC 2006 Manual page 102

If the indicator or buzzer comes on...
(h)
(i)
(j)
(k)
(l)
(m) Key reminder buzzer
94
Stop and check.
Take vehicle to Scion dealer. If brake system warning light is also on, stop immediate-
ly and contact Scion dealer.
Close all side doors and back door.
Take vehicle to Scion dealer immediately.
Adjust tire inflation pressure and turn off warning light by pushing reset switch for a
few seconds. If the warning light remains on, contact Scion dealer.
Remove key.
Do this.