Alarm reset

Tiny
LSOLAMAN
  • MEMBER
  • 1997 TOYOTA AVALON
The factory car alarm on my car is preventing it from starting. I have replaced the battery as it was quite old (2006), but the car still will not start. How do I reset/disable the factory alarm?
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Sunday, March 10th, 2013 AT 6:29 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Roll up all windows exit the car lock all doors with the remote, then wait ten minutes, unlock the door using the key, that will reset the alarm. This guide will help you reset the security system

https://www.2carpros.com/articles/how-to-reset-a-security-system

Please let us know what happens.
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Sunday, March 10th, 2013 AT 6:34 PM
Tiny
LSOLAMAN
  • MEMBER
The door unlocks but the alarm still goes off whenever I open it. Lasts for twenty seconds and then shuts off by itself, but the car still will not start. I do not think it is the starter, alternator, as there is no "clicking" sound when I try to start the car, it simply will not crank. The power, lights work, along with the windows, and the clock comes on. How do I have the system scanned? This is the first time in a very long while that the alarm has gone off in the car. The car previously belonged to my father and I had thought that the alarm had been disabled.

I have read on other posts that disconnecting the positive battery charge in sequence with turning the key to the on position might help. I have also read that disconnecting the negative battery charge in sequence with turning the key to the on position might work as well. I have also read that there is a "valet switch" under the dash of a 1998 Avalon that might work to disable the alarm, but my car is a 1997, so I am not sure if that will work.

The anti theft/alarm light located to the left of the steering wheel is flashing red and blinking on and off, and that has not happened for awhile.
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Sunday, March 10th, 2013 AT 7:04 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
It sounds like a problem somewhere within the security system. You should scan to see if there are trouble codes.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
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Sunday, March 10th, 2013 AT 7:12 PM
Tiny
MULEBARN
  • MEMBER
  • 1997 TOYOTA AVALON
We changed the battery and now the car will not start the anti-theft system is set.
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Saturday, January 12th, 2019 AT 1:32 PM (Merged)
Tiny
KEN
  • ADMIN
Hello,

To reset the security system shut all doors and disconnected the battery. Remove the negative battery terminal from the battery and hold it on the positive battery terminal for five minutes which will discharge the capacitors and hard reboot the system restarting the security protocol.

https://www.2carpros.com/articles/how-to-reset-a-security-system

Please let us know what happens.

Cheers, Ken
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Saturday, January 12th, 2019 AT 1:32 PM (Merged)
Tiny
WAYNE BLUE
  • MEMBER
Does this work for all cars, or just Toyota's?
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Saturday, January 12th, 2019 AT 1:32 PM (Merged)
Tiny
STEVE W.
  • EXPERT
It depends on the car and why the system is armed. If it was due to a battery replacement it can work.
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Saturday, January 12th, 2019 AT 1:32 PM (Merged)

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