Lexus GS 450h 2008 Owner's Manual page 26

1-1. Hybrid system
Conditions in which the gasoline engine may not stop
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The gasoline engine starts and stops automatically. However, it may not stop auto-
matically in the following conditions:
During gasoline engine warm-up
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During hybrid battery (traction battery) charging
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During low or high hybrid battery (traction battery) temperature
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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 or 10 miles (16 km). 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. When driving in heavy traffic, operate the vehicle with the shift lever in
"D" or "S" to avoid discharging 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.
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