Lexus 2013 GS 350 Owner's Manual page 721

If your vehicle overheats
Stop the vehicle in a safe place and turn off the air conditioning system.
1
Check to see if steam is coming out from under the hood.
2
If you see steam:
Stop the engine. Carefully lift the hood after the steam subsides and
then restart the engine.
If you do not see steam:
Leave the engine running and carefully lift the hood.
Check to see if the cooling fan is operating.
3
If the fan is operating:
Wait until the temperature of the engine (shown on the instrument
panel) begins to fall and then stop the engine.
If the fan is not operating:
Stop the engine immediately and call your Lexus dealer.
After the engine has cooled
4
down sufficiently, check the
engine coolant level and inspect
the radiator core (radiator) for
any leaks.
If the engine compartment cover
needs to be removed:
Add engine coolant if necessary.
5
Water can be used in an emergency if
engine coolant is unavailable.
( P. 756)
Have the vehicle inspected at the nearest Lexus dealer as soon as possi-
ble.
GS350_U (OM30C34U)
7-2. Steps to take in an emergency
P. 616
I n f o r ma t i o n P r o v i d e d b y :
7