Lexus NX 300h 2020 Owner's Manual page 420

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7-2. Steps to take in an emergency
5
Add coolant if necessary.
Water can be used in an emergency if
coolant is unavailable.
6
After stopping the hybrid system
and waiting for 5 minutes or more,
start the hybrid system again and
check if "Hybrid System Over-
heated" is shown on the multi-infor-
mation display.
If the message does not disappear:
Stop the hybrid system and contact your
Lexus dealer.
If the message is not displayed:
The hybrid system temperature has
dropped and the vehicle may be driven
normally.
However, if the message appears again fre-
quently, contact your Lexus dealer.
WARNING
■ To prevent an accident or injury when
inspecting under the hood of your
vehicle
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 has subsided. The engine com-
partment may be very hot.
After the hybrid system has been
●
turned off, check that the "READY"
indicator is off. When the hybrid sys-
tem 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 fingers or cloth-
ing (especially a tie, a scarf or a muf-
fler) getting caught, resulting in serious
injury.
Do not loosen the coolant reservoir
●
cap while the hybrid system and radia-
tor are hot.
High temperature steam or coolant
could spray out.
NOTICE
When adding engine/power control
■
unit coolant
Add coolant slowly after the hybrid sys-
tem 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 sys-
■
tem
Observe the following precautions:
Avoid contaminating the coolant with
●
foreign matter (such as sand or dust
etc.).
Do not use any coolant additive.
●