Disable 2002 toyota avalon alarm - 2002 Toyota Avalon

What kind of car?

this is for 2004 don't know if same engine.

If the alarm system has a battery remove it otherwise removing the car battery for a while may reset it. In emergency contact your local toyota dealers mechanics department and they may be able to help you at no cost.
If you put a general enquiry on google you might get lucky, do not be too specific. i.e. toyota 1994 alarm reset procedure

disconnect battery and try again

Same here... I have a 1998 Toyota Avalon XL. My car battery died. Replaced my car battery, but found out that when you unplug and plug the car battery with this car it engages in security mode (I have factory car alarm). This disables the engine and wont let you turn the ignition aka start the car engine until the remote (keyless entry) "UNLOCK" is applied. My remote is also lost so I cannot disable the alarm.
The only thing I can think of to do is unplug the battery again to disable everything (car alarms are annoying...) and call the dealer to pick the car up and perform the diagnosis. Most likely they will offer you another keyless (ugh... expensive) and/or you could ask to disable the factory car alarm.
I know thats not much help but it seems to be the only option from what I researched currently....

2002 Toyota Avalon Belt Routing




Hope helps.

problem with steering wheel/column wiring harnes

disable alarm on 96 avalon

get a used one.it can be reprogrammed with the obd2 system for 100 bucks.