Lexus ES350 Manual page 820

Starting the hybrid system when the 12-volt battery is discharged
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The hybrid system cannot be started by push-starting.
To prevent 12-volt battery discharge
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Turn off the headlights and the audio system while the hybrid system is off.
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Turn off any unnecessary electrical components when the vehicle is running at a
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low speed for an extended period, such as in heavy traffic.
Charging the 12-volt battery
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The electricity stored in the 12-volt battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of certain elec-
trical appliances. If the vehicle is left for a long time, the 12-volt battery may dis-
charge, and the hybrid system may be unable to start. (The 12-volt battery recharges
automatically while the hybrid system is operating.)
When recharging or replacing the 12-volt battery
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Make sure that the key is not inside the vehicle when recharging or replacing the
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12-volt battery. The key may be locked in the vehicle if the alarm is activated.
(P. 87)
In some cases, it may not be possible to unlock the doors using the smart access
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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.
The hybrid system may not start on the first attempt after the 12-volt battery has
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recharged but will start normally after the second attempt. This is not a malfunction.
The "POWER" switch mode is memorized by the vehicle. When the 12-volt battery
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is reconnected, the system will return to the mode it was in before the 12-volt bat-
tery 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
discharged, be especially careful when reconnecting the 12-volt battery.
ES350_300h_OM_OM33A60U_(U)
7-2. Steps to take in an emergency
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