If Your Vehicle Overheats - Lexus LS 500h 2019 Owner's Manual

548 7-2. Steps to take in an emergency
WARNING
When replacing the 12-volt battery
■
When the vent plug and indicator are
●
close to the hold down clamp, the bat-
tery fluid (sulfuric acid) may leak.
For information regarding 12-volt bat-
●
tery replacement, contact your Lexus
dealer.
After replacing, securely attach the
●
exhaust hose and exhaust hole plug to
the exhaust hole of the replaced
12-volt battery. If not properly installed,
gases (hydrogen) may leak into the
vehicle interior, and there is the possi-
ble danger of the gas igniting and
exploding.
NOTICE
When handling jumper cables
■
When connecting the jumper cables,
ensure that they do not become entan-
gled in the cooling fan or engine drive
belt.
To prevent damaging the vehicle
■
The exclusive jump starting terminal is to
be used when charging the 12-volt bat-
tery from another vehicle in an emer-
gency. It cannot be used to jump start
another vehicle.
LS500h_OM_General_OM50J66E

If your vehicle overheats

The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge (P.125, 129) is in the red
zone or a loss of hybrid system
power is experienced. (For exam-
ple, the vehicle speed does not
increase.)
 "Engine Coolant Temp High Stop
in a Safe Place See Owner's
Manual" or "Hybrid System
Overheated Output Power
Reduced" is shown on the
multi-information display.
 Steam comes out from under the
hood.
Correction procedures
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.
3 After the hybrid system has cooled
down sufficiently, inspect the hoses