It's in the owners manual. Turn the key to the "on" position with the odometer reading showing. Hold the trip reset button in for five seconds or more. When 0000000000 shows, release the button. The current odometer reading should show.
This will be in your owners manual. You can also see the related question linked to the right for the 2005.
maintenance with engine
Maint. required light want reset.
How do you reset the Airbag warning light on a 1995 Toyota Avalon?
What year ?
disconnect the battery
Depends on which light you are referring to. The "Check Engine" light comes on when there is a problem with the emissions system. The "Maintenance Required Light" comes on when scheduled maintenance is required as outlined in your owners manual.
How do you reset the maintenance required light in the 2011Toyota RAV4 with a smart key starting system
It needs maintenance you can disconnect the negative (-) terminal of the battery and reconnect it to clear any erros in the ECU
It means it's time to change your oil.
Your drivers manual should give you the information to reset the oil maintenance light.
you take it to a mechanic to get it fixed because the reason that light is on is because something is wrong with it