If Your Vehicle Overheats - Lexus GS 450h2011 Manual

5-2. Steps to take in an emergency

If your vehicle overheats

If your hybrid system overheats:
Stop the vehicle in a safe place and turn off the air conditioning
STEP 1
system.
Check to see if steam is coming out from under the hood.
STEP 2
If you see steam: 
Stop the hybrid system. Carefully lift the hood after the
steam subsides and then restart the hybrid system.
If you do not see steam:
Leave the hybrid system operating and carefully lift the
hood.
Remove the engine compartment cover. (P. 461)
STEP 3
Check to see if the cooling fan is operating.
STEP 4
If the fan is operating: 
Wait until the engine coolant temperature gauge begins to
fall and then stop the hybrid system.
If the fan is not operating: 
Stop the hybrid system immediately and call your Lexus
dealer.
STEP 5
GS_HV_U (OM30C14U)
May 21, 2010 2:41 pm
After the hybrid system has
cooled down sufficiently, check
the coolant level and inspect the
radiator core (radiator) for any
leaks.
5
581