Toyota Avalon Factory Alarm will go off?

The battery is unrelated unless the remote is going bad. It is probably coincidence. This is all of course if it is the Toyota factory security system that is installed.

This types of problems are noticed many times.

With the key in the door or with the remote the alarm go off in both cases.It wouldn't matter. It could go off with either. It would also go off when  used the key in the trunk.

I have seen the micro switch in the doors go bad but this is usually only an issue if the alarm goes off when using the key in the door. The key in the trunk normally will have no affect either.In that case keyfob battery needs to be replaced and checked.

This details will help.

Thanks.

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