Toyota Corolla Instruction Manual page 75

 System maintenance
The vehicle has a maintenance-free type engine 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 to the security system
(key with a built-in transponder chip) of another vehicle
Corolla_TMMT_EE (OM12F04E)
1-2. Theft deterrent system
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