Theft Deterrent System; Engine Immobilizer System - Lexus IS250 2009 Service Manual

1-6. Theft deterrent system

Engine immobilizer system

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.
System maintenance
n
The vehicle has a maintenance-free type of engine immobilizer system.
Conditions that may cause the system to malfunction
n
If the grip portion of the key is in contact with a metallic object
l
If the key is in close proximity to or touching a key to the security system (key
l
with a built-in transponder chip) of another vehicle
The indicator light flashes after
the "ENGINE START STOP"
switch has been turned OFF to
indicate that the system is oper-
ating.
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