2013 Lexus GS 450h Owners Manual - Page 744

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7-2. Steps to take in an emergency

GS450h_U (OM30D01U)

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When recharging or replacing the 12-volt battery

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Make sure the key is not inside the vehicle when recharging or replacing the 12-volt

battery to prevent the doors from being locked with the key left inside the vehicle

when the alarm operates.

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In some cases, it may not be possible to unlock the doors using the smart access

system with push-button start when the 12-volt battery is discharged. Use the wire-

less remote control or the mechanical key to lock or unlock the doors.

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The hybrid system may not start on the first attempt after the 12-volt battery has

recharged but will start normally after the second attempt. This is not a malfunction.

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The power switch mode is memorized by the vehicle. When the 12-volt battery is

reconnected, the system will return to the mode it was in before the 12-volt battery

was discharged. Before disconnecting the 12-volt battery, turn the power switch off.

If you are unsure what mode the power switch was in before the 12-volt battery dis-

charged, be especially careful when reconnecting the 12-volt battery.

CAUTION

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Avoiding 12-volt battery fires or explosions

Observe the following precautions to prevent accidentally igniting the flammable

gas that may be emitted from the 12-volt battery:

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Make sure each jumper cable is connected to the correct terminal and that it is

not unintentionally in contact with any other than the intended terminal.

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Do not allow the other end of the jumper cable connected to the “+” terminal to

come into contact with any other parts or metal surfaces in the area, such as

brackets or unpainted metal.

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Do not allow the + and - clamps of the jumper cables to come into contact with

each other.

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Do not smoke, use matches, cigarette lighters or allow open flame near the 12-

volt battery.