How do you reset immobilizer on your 2001 Toyota Celica?

To reset the immobilizer on a 2001 Toyota Celica, first ensure that you have the correct key or key fob. Insert the key into the ignition and turn it to the "On" position (not starting the engine) for about 5-10 seconds, then turn it back to "Off." Repeat this process two more times, ending with the key in the "Off" position. Finally, turn the key to "Start" to see if the immobilizer has been reset and the vehicle will start. If issues persist, consulting a professional or the owner's manual may be necessary.