Lexus GS 350, Owner'S Manual, Page: 747 / 831

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7-2. Steps to take in an emergency
GS350_U (OM30C34U)
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Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
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To prevent battery discharge
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Turn off the headlights and the audio system while the engine is off.
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Turn off any unnecessary electrical components when the vehicle is running at a
low speed for an extended period, such as in heavy traffic.
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Charging the battery
The electricity stored in the battery will discharge gradually even when the vehicle is
not in use, due to natural discharge and the draining effects of certain electrical
appliances. If the vehicle is left for a long time, the battery may discharge, and the
engine may be unable to start. (The battery recharges automatically during driving.)
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When recharging or replacing the battery
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Make sure the key is not inside the vehicle when recharging or replacing the bat-
tery 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 battery is discharged. Use the wireless
remote control or the mechanical key to lock or unlock the doors.
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The engine may not start on the first attempt after the battery has recharged but
will start normally after the second attempt. This is not a malfunction.
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The engine switch mode is memorized by the vehicle. When the battery is recon-
nected, the system will return to the mode it was in before the battery was dis-
charged. Before disconnecting the battery, turn the engine switch off.
If you are unsure what mode the engine switch was in before the battery dis-
charged, be especially careful when reconnecting the battery.