If Your Vehicle Overheats - Lexus rx450h Service Manual

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7-2. Steps to take in an emergency

If your vehicle overheats

The following may indicate that your vehicle is overheating.
The needle of the engine coolant temperature gauge (P. 97) enters 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
"Engine Coolant Temp High Stop in a Safe Place See Owner's Manual" is
■
shown on the multi-information display
Stop the vehicle in a safe place and turn off the air conditioning system, and
1
then stop the hybrid system.
If you see steam:
2
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has
3
cooled down sufficiently, inspect
the hoses and radiator core (radi-
ator) for any leaks.
Radiator
1
Cooling fans
2
If a large amount of coolant leaks,
immediately contact your Lexus
dealer.
The coolant level is satisfactory if
4
it is between the "FULL" and
"LOW" lines on the reservoir.
Reservoir
1
"FULL" line
2
"LOW" line
3
Radiator cap
4
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