Lexus RX 450h 2010 Owner's Manual page 29

1-1. Hybrid system
Charging the battery
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As the gasoline engine charges the hybrid battery (traction battery), the battery
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does not need to be charged from an outside source. However, if the vehicle is
left parked for a long time the hybrid battery will slowly discharge. For this rea-
son, be sure to drive the vehicle at least once every few months for at least 30
minutes. If the hybrid battery becomes fully discharged and you are unable to
jump-start the vehicle with the 12-volt battery, contact your Lexus dealer.
If the shift lever is in N, the hybrid battery (traction battery) will not be charged.
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Always put the shift lever in P when the vehicle is stopped. When driving in
heavy traffic, operate the vehicle with the shift lever in D or S to avoid discharg-
ing the battery.
After the 12-volt battery has discharged or has been changed or removed
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The gasoline engine may not stop even if the vehicle is running on the hybrid battery
(traction battery). If this continues for a few days, contact your Lexus dealer.
Sounds and vibrations specific to a hybrid vehicle
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There may be no engine sounds or vibration even though the vehicle is able to
move. Always shift the shift lever to P when parked.
The following sounds or vibrations may occur when the hybrid system is operating,
and are not a malfunction:
Motor sounds may be heard from the engine compartment.
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Sounds may be heard from the hybrid battery (traction battery) under the rear
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seat when the hybrid system starts or stops.
Sounds from the hybrid system may be heard when the back door is open.
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Sounds may be heard from the hybrid transmission when the engine is started
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or stopped, or while the engine is idling.
Engine sounds may be heard when accelerating sharply.
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Sounds may be heard due to regenerative braking when the brake pedal is
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depressed and accelerator is loosened.
Vibration may be felt when the gasoline engine starts or stops.
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Cooling fan sounds may be heard from the air intake vents under the rear seat.
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Maintenance, repair, recycling, and disposal
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Contact your Lexus dealer regarding maintenance, repair, recycling and disposal.
Do not dispose of the vehicle yourself.
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