engine overheat LEXUS LS430 2006 User Guide

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5-2. Steps to take in an emergency
■Overheating
If you observe the following, your vehicle may be overheating.
• The engine coolant temperatur
e gauge enters the red zone or a loss of power is
experienced.
• Steam is coming out from under the hood.
CAUTION
■To prevent an accident or injury when in specting under the hood of your vehicle
●Keep hands and clothing away from the fan and other belts while the engine is
running.
●Do not loosen the radiator cap while the engine and radiator are hot. 
Serious injury could result from scalding hot fluid and steam blown out under
pr
essure.
NOTICE
■When adding engine coolant
Wait until the engine has cooled do wn befor
e adding engine coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot engine too quickly
ca
n cause damage to the engine.
Add engine coolant if required.
Water can be used as an emer -
gency measure if engine coolant is
una
vailable.( P.367 )

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What to do if...
What to do if...
A tire puncturesP. 3 4 7If you have a flat tire
The engine does not start
P. 3 5 3If the engine will not start
P. 5 4Engine immobilizer system
P. 3 5 6If the vehicle has a discharged battery
The transmission selector lever 
cannot be moved outP. 3 5 4If the transmission selector lever cannot
be shifted from P
The engine coolant temperature
gauge enters the red zone
Steam can be seen coming
from under the hood
P. 3 5 9If your vehicle overheats
You lose your keyP. 3 5 5If you lose your keys
The battery is dischargedP. 3 5 6If the vehicle has a discharged 
battery
The doors cannot be lockedP. 1 5Doors
The horn begins to soundP. 5 5Alarm
The vehicle is stuck in mud 
or sandP. 3 6 1If the vehicle becomes stuck