Immobilizer ????? i tried to unlock my door through the open window and my horn wont stop going off the headlights are flashing and it wont start??? it doesnt have an alarm? but i guess theres an immobilizer somthing? how do i get it to stop? i need to drive my car. thanks

Which security systems ? Content theft or the immobilizer ? Immobilizer keeps the vehicle from starting an running if proper key isn't used . Content theft is if somebody breaks a window an opens a door ,horn honk's - light's flash . ?

Anti theft isn't working correctly.. try taking the ground cable off battery for a couple mins and reconnecting to try and reset anti theft..

You need to connect the battery. Lock and unlock the car with the remote. That will cause the ani-theft to stop flashing the lights. It does, however, stop after 3 minutes. That is, until you disturb the vehicle again. Then it starts the 3 minutes again. You need to get the remote out, and lock the doors and unlock the doors. Done.

I'm pretty sure you triggered your vehicle alarm / immobilizer. Surely you know how to reset it, right? Is there a button on your key fob that does that?

Security engaged, Lock and unlock doors with key until horn stops.

put fuse back in disconnect batt wait 60 seconds re attach, when the horn starts honking lock and unlock drivers door with the key while doors closed window down. get in car and start it, should be fine now.

This is from Ken on CarPros:
Here is the way to reset the security system.

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

Here is the systems descriptions

There are 2 security system, namely anti-theft and immobilizer.

Here are the 2 systems.

DESCRIPTION & OPERATION
Anti-theft system is controlled by Body Control Module (BCM). BCM receives signals from hood switch, trunk switch, door switches and Local Control Modules (LCMs). There are 5 LCMs located throughout vehicle.

To set anti-theft system in armed mode, remove ignition key, close all doors, trunk and hood. Lock doors using key or remote controller. The SECURITY light will illuminate for 30 seconds, then flash in 2.4 second intervals, indicating system is in armed mode.

To cancel armed mode, unlock and open any door or trunk lid using key or remote controller. SECURITY light will flash every second, indicating system is disarmed.

Alarm will activate (horn sounds, headlights flash and starter circuit is disabled) if any of the following conditions occur while system is in armed mode:

Engine hood or trunk lid is opened using the hood or trunk lid release.
Door(s) is unlocked without key or remote controller.
Tampering with any door/trunk lid key cylinders.
To deactivate anti-theft system, unlock door or trunk using key or remote controller.

If it is the immobilizer that is preventing the engine from being started, ensure you have the correct key and the transponder is intact. Quite often keys are dropped and if it breaks open, the internals would scatter all over. When this occurs, there is a tendency for the transponder to be lost.

Please let us know happens so it will help others.

Best, Ken
I hope that helps you out!

disconnect the neg battery terminal for 30 sec leave drivers door open, reconnect and start your car, if the alarm turns on after conecting battery use your key in the drivers door and unlock

You have to roll up all the windows lock all the doors and use your key to unlock on of the front doors or the trunk when the alarm is going off. I don't remember which it was. Remember all doors must be closed and locked with the windows up for this to work.

YOU MUST UNLOCK DOOR WITH KEY AND NOT BE SO QUICK TO PULL THE DOOR HANDLE