Lexus RX450H Manual page 662

5-2. Steps to take in an emergency
CAUTION

To prevent an accident or injury when inspecting under the hood of your
vehicle

If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injuries such as burns.

After the hybrid system has been turned off, check that the indicator on
the "POWER" switch and the "READY" indicator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally 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 clothing (especially a tie, a scarf or a muf-
fler) getting caught, resulting in serious injury.

Do not loosen the radiator cap while the hybrid system and radiator are
hot.
Serious injuries, such as burns, may result from hot coolant and steam
released under pressure.
NOTICE

When adding engine/power control unit coolant
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.

To prevent damage to the cooling system
Observe the following precautions:

Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.)

Do not use any coolant additives.
624
RX450h_EE