Toyota Avalon Owner's Manual page 168

If the indicator or buzzer comes on...
(h) or
(i)
(indicator and buzzer)
(j)
(k)
(l)
(m)
(n)
146
'06 AVALON_U (L/O 0508)
Take vehicle to Toyota dealer.
If brake system warning light is also on, stop immediately and contact Toyota dealer.
Close all doors.
Take vehicle to Toyota dealer immediately.
Take vehicle to Toyota dealer.
Add washer fluid.
Take vehicle to Toyota dealer.
Replace engine oil.
I n f o r ma t i o n P r o v i d e d b y :
Do this.