Lexus GS450h Owner's Manual page 567

The coolant level is satisfactory if it is between the "FULL" and
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"LOW" lines on the reservoir.
Reservoir
1
"FULL"
2
"LOW"
3
Coolant inlet cap
4
Add coolant if necessary.
5
(P. 569)
Water can be used in an emer-
gency if engine coolant is unavail-
able.
Start the hybrid system and turn the air conditioning system on to
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check that the radiator cooling fans operate and to check for coolant
leaks from the radiator or hoses.
The fans operate when the air conditioning system is turned on immediately
after a cold start. Confirm that the fans are operating by checking the fan
sound and air flow. If it is difficult to check these, turn the air conditioning sys-
tem on and off repeatedly. (The fans may not operate in freezing tempera-
tures.)
If the fans are not operating:
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Stop the hybrid system immediately and contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.
GS450h_OM_OM30E26U_(U)
7-2. Steps to take in an emergency
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