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To set off the alarm in your 2005 Toyota Corolla, you must turn the key back and forth between the "run" and "off" positions five times. Then, switch the key to the "start" position to deactivate the alarm. This process can also be triggered by a battery replacement, power loss, or a malfunctioning passlock sensor. If the anti-theft system is triggered, it may prevent the car from starting. Various issues can trip the alarm system, necessitating troubleshooting or OBD testing to pinpoint the problem.
To deactivate the alarm on your 2005 Toyota Corolla, simply insert the key and switch it back and forth between the "on" and "off" positions five times. Once you've done this, turn the key to the "start" position to disable the alarm system.