Toyota HIGHLANDER HYBRID 2009 Manual page 535

Overheating
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The following symptoms may occur when your vehicle is overheating:
Hybrid system output decreases.
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Steam is coming from the engine area.
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CAUTION
To prevent an accident or injury when inspecting under the hood of
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your vehicle
If steam is seen coming from under the hood, do not open the hood until
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the steam has subsided. The engine compartment may be very hot, caus-
ing serious injury such as burns.
With a hybrid vehicle, there are times when the gasoline engine automati-
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cally starts to run or the cooling fans suddenly start to operate. Do not
touch or approach the rotating parts of the belt or fans. Doing so may lead
to fingers, clothes or tools getting caught, resulting in an accidental injury.
Do not loosen the coolant reservoir cap while the hybrid system and radia-
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tor are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
NOTICE
When adding engine/power control unit coolant
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Wait until the hybrid system has cooled down before adding engine/power
control unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid sys-
tem too quickly can cause damage to the hybrid system.
5-2. Steps to take in an emergency
5
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