Theft deterrent system -> Immobilizer system for Your Toyota Prius 4 Door Fourth Generation (2016-2022)

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1-5. Theft deterrent system  
Immobilizer system  
The vehicle’s keys have built-in transponder chips that prevent  
the hybrid system from starting if a key has not been previously  
registered in the vehicle’s on-board computer.  
Never leave the keys inside the vehicle when you leave the vehi-  
cle.  
This system is designed to help prevent vehicle theft but does not  
guarantee absolute security against all vehicle thefts.  
The indicator light flashes after  
the power switch has been turned  
off to indicate that the system is  
operating.  
The indicator light stops flashing  
after the power switch has been  
turned to ACCESSORY or ON  
mode to indicate that the system  
has been canceled.  
System maintenance  
The vehicle has a maintenance-free type immobilizer system.  
Conditions that may cause the system to malfunction  
If the grip portion of the key is in contact with a metallic object  
If the key is in close proximity to or touching a key registered to the security  
system (key with a built-in transponder chip) of another vehicle  
PRIUS_OM_OM47D44U_(U)  
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1-5. Theft deterrent system  
Certification for the immobilizer system  
For vehicles sold in the U.S.A., Hawaii, American Samoa, Guam, Saipan  
and Puerto Rico  
1
For vehicles sold in Canada  
NOTICE  
To ensure the system operates correctly  
Do not modify or remove the system. If modified or removed, the proper  
operation of the system cannot be guaranteed.  
PRIUS_OM_OM47D44U_(U)  
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1-5. Theft deterrent system  
PRIUS_OM_OM47D44U_(U)