Lexus IS F, Owner'S Manual

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1-6. Theft deterrent system
Engine immobilizer system
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System maintenance
The vehicle has a maintenance-free type engine immobilizer system.
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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
The vehicle's keys have built-in transponder chips that prevent the engine
from starting if the key has not been previously registered in the vehicle's
on-board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
The indicator light flashes after
the “ENGINE START STOP”
switch has been turned OFF to
indicate that the system is oper-
ating.
The indicator light stops flashing
after the “ENGINE START
STOP” switch has been turned
to ACCESSORY or IGNITION
ON mode to indicate that the
system has been canceled.