If your Avalon’s battery is disconnected or loses too much charge, you will have to address several systems that may no longer be working. Some functions are not a matter of reprogramming, though. A battery disconnection will reset the trip meter readings to zero; these readings are not recoverable. Fortunately, a disconnection does not erase the memory of the push-button start function. Upon battery reconnection, the malfunction indicator light will turn on, which can prevent your car from passing its next emissions inspection. The light will turn off only after several driving trips.
Reprogram the power windows and their jam prevention function to work again, if they no longer function, by holding down the power window button to lower the window halfway then pulling up the window button to close it. Do this for the power window switches for both front doors.