Lexus IS300H 2017 Manual page 154

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3-2. Opening, closing and locking the doors and trunk
Trunk light (if equipped)
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The trunk light turns on when the trunk is opened.
Function to prevent the trunk being locked with the electronic key inside
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When all doors are locked, closing the trunk lid with the electronic key left inside the
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trunk will sound an alarm.
In this case, the trunk lid can be opened pressing the trunk release button on the trunk
lid.
If the spare electronic key is put in the trunk with all the doors locked, the key confine-
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ment prevention function is activated so the trunk can be opened. In order to prevent
theft, take all electronic keys with you when leaving the vehicle.
If the electronic key is put in the trunk with all the doors locked, the key may not be
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detected depending on the location of the key and the surrounding radio wave condi-
tions. In this case, the key confinement prevention function cannot be activated, causing
the doors to lock when the trunk is closed. Make sure to check where the key is before
closing the trunk.
The key confinement prevention function cannot be activated if any one of the doors is
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unlocked. In this case, open the trunk using the trunk opener.
Using the mechanical key
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The trunk can be also opened using the mechanical key. (P. 628)
If the smart entry & start system or the wireless remote control does not operate prop-
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erly
Use the mechanical key to unlock the trunk. (P. 628)
Replace the key battery with a new one if it is depleted. (P. 549)
When leaving a key to the vehicle with a parking attendant
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P. 140
Customization
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The trunk unlocking operation can be changed. (Customizable features: P. 657)