How Theft Deterrent System works on Toyota Highlander

Toyota Highlander is equipped with a theft deterrent system that can help prevent unauthorized entry into your vehicle.

Toyota Highlander Second generation XU40 – (photo by Toyota)

If any of the doors, the rear door, or the hood is unlocked without using your key or remote control transmitter, or if the ignition is hot-wired, or the 12-volt battery disconnected and then reconnected while the vehicle is locked, an alarm will be triggered.


Should any of these situations occur, the alarm will sound the horn intermittently, flash the headlights, taillights and turn signal lights, and turn on the central interior light. In addition, the engine starter will also be deactivated.

How to enable it

To set the theft deterrent system, turn the key to the lock position and remove it. The indicator light will begin to flash. Once everyone is out of the vehicle, close and lock the side doors and rear door. The indicator light will remain on. The system activates automatically 30 seconds after all doors are closed and locked. The indicator light will begin flashing again, confirming that the system is activated.

Please note that once you’ve set the system, unlocking a door from the inside will trigger the alarm.

If any of the following situations occur within 30 seconds of locking the doors, the theft deterrent system will be canceled automatically if:

  • Any of the side doors, rear door or hood is opened.
  • Any of the side doors or rear door is unlocked.
  • The key is inserted into the ignition.
  • The 12-volt battery terminal is disconnected.

The alarm can be stopped by turning the ignition key from the lock to the unlock position, or by unlocking any of the side doors or the rear door using your key or the remote control transmitter.

If your Highlander’s taillights come on for two seconds, the theft deterrent system has been activated. Check to see if your vehicle has been tampered with.


Author: Nabeel K
Email: nabeel@wheelsjoint.com



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