If Your Vehicle Overheats - Lexus UX 250h 2020 Owner's Manual

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7-2. Steps to take in an emergency
WARNING
When replacing the 12-volt battery
■
When the vent plug is close to the hold
●
down clamp, the battery fluid (acid)
may leak.
For information regarding battery
●
replacement, contact your Lexus
dealer.
● After exchanging, securely attach the
elbow connected to the exhaust hose,
and exhaust hole plug to the exhaust
hole of the exchanged 12-volt battery.
If not properly installed, gases (hydro-
gen) may leak into the vehicle interior,
and there is the possible 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 fans or 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.

If your vehicle overheats

The following may indicate that
your vehicle is overheating.
 The engine coolant temperature
gauge (P.78, 82) enters the
red zone, or a loss of hybrid sys-
tem 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 over-
heated 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