Anti-Theft System: Operation

1994 Toyota Previa LE, 2TZ-FZE, AWDSECTION Operation

Anti-Theft System (ATS) sets when ignition key is turned to LOCK position, passengers are removed and all doors, trunk and hood are closed and/or locked. There is a 30 second preparation time period while doors are locked before system is set. A SECURITY indicator illuminates during 30 second preparation time, and flashes when ATS is set.

Indicator light, located on instrument panel, will come on when all doors, trunk(s) and hood are closed. Indicator light flashes one second on and one second off when system is set. When system is set, a key must be used to open any door, trunk or hood. If indicator light is off, ATS is inactive and any door, trunk or hood may be opened without system activation.

One minute after activation, alarm will automatically stop and lights will stop flashing. Starter system interrupt will continue to be activated. If condition causing anti-theft system to activate is not corrected, alarm and flashing lights will again be activated.

Turning ignition from LOCK position to ACC position turns alarm and flashing lights off, but leaves starter system interrupt still activated. If condition causing anti-theft system to activate is corrected, system automatically resets until activated again.

ATS can be interrupted by opening trunk lid with key. While trunk lid is open, any door or hood may be opened. System will activate if battery is disconnected and reconnected. To reactivate system, close and lock doors and hood. Close trunk lid without key and system will reset 2 seconds later.

Anti-Theft System and starter interrupt will be canceled when either front door is unlocked using the ignition key. To locate components, see Figure.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.