To Prevent An Accident Or Injury When Inspecting Under The Hood Of Your Vehicle; When Adding Engine/Power Control Unit Coolant; To Prevent Damage To The Cooling System - Lexus RX 450H Owner's Manual

Start the hybrid system and check if "Hybrid System Overheated Reduced
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Output Power" is shown on the multi-information display.
If the message does not disappear:
Stop the hybrid system and contact your Lexus dealer.
If the message is not displayed:
Have the vehicle inspected at the nearest Lexus dealer.
WARNING

To prevent an accident or injury 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 steam
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has subsided. The engine compartment may be very hot.
After the hybrid system has been turned off, check that the "READY" indicator is off.
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When the hybrid system is operating, the gasoline engine may automatically start, or
the cooling fans may suddenly operate even if the gasoline engine stops. Do not
touch or approach rotating parts such as the fans, which may lead to fingers or cloth-
ing (especially a tie, a scarf or a muffler) getting caught, resulting in serious injury.
Do not loosen the radiator cap and the coolant reservoir caps while the hybrid system
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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 additive.
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7-2. Steps to take in an emergency
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