Lexus LS500, Manual

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366
7-2. Steps to take in an emergency
LC500_LC500h_OM_OM11405U_(U)

If the engine coolant temperature
gauge enters the red zone or
“Engine Coolant Temp High Stop in
a Safe Place See Owner’s Manual”
is shown on the multi-information
display
1
Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the hybrid system.
2
If you see steam:
Carefully lift the hood after the
steam subsides.
If you do not see steam:
Carefully lift the hood.
WARNING
● Keep hands and clothing (especially a
tie, a scarf or a muffler) away from the
fan and belts. Failure to do so may
cause the hands or clothing to be
caught, resulting in serious injury.
● While the engine and radiator are hot,
do not loosen or remove the coolant
reservoir cap.
High temperature steam or coolant
could spray out.
NOTICE
■ When adding engine coolant
Add coolant slowly after the engine has
cooled down sufficiently. Adding cool
coolant to a hot engine too quickly can
cause damage to the engine.
■ 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.
If your vehicle overheats
(LC500h)
The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge (

P.74) is in the red zone
or a loss of hybrid system power is
experienced. (For example, the
vehicle speed does not increase.)

“Engine Coolant Temp High Stop
in a Safe Place See Owner’s
Manual” or “Hybrid System
Overheated Reduced Output
Power” is shown on the multi-
information display.
 Steam comes out from under the
hood.
Correction procedures