When Inspecting Under The Hood Of Your Vehicle; When Adding Engine/Power Control Unit Coolant; To Prevent Damage To The Cooling System - Lexus GS450h Owner's Manual

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7-2. Steps to take in an emergency
CAUTION

When inspecting under the hood of your vehicle

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Observe the following precautions.
Failure to do so may result in serious injury such as burns.
If steam is seen coming from under the hood, do not open the hood until the
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steam has subsided. The engine compartment may be very hot.
After the hybrid system has been turned off, check that the indicator on the
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power switch and the "READY" indicator are off.
When the hybrid system is operating, the gasoline engine may automatically
start, or the cooling fan may suddenly operate even if the gasoline engine stops.
Do not touch or approach rotating parts such as the fan, which may lead to fin-
gers or clothing (especially a tie, a scarf or a muffler) getting caught, resulting in
serious injury.
Do not loosen the coolant inlet cap or the
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coolant reservoir cap while the hybrid sys-
tem and radiator are hot.
High temperature steam or coolant could
spray out.
NOTICE

When adding engine/power control unit coolant

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Add coolant slowly after the hybrid system has cooled down sufficiently. Adding
cool coolant to a hot hybrid system too quickly can cause damage to the hybrid
system.

To prevent damage to the cooling system

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Observe the following precautions:
Avoid contaminating the coolant with foreign matter (such as sand or dust etc.).
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Do not use any coolant additives.
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