If Your Vehicle Overheats - Toyota 2008 Prius Quick Reference Manual

5-2. Steps to take in an emergency

If your vehicle overheats

The following may indicate that your vehicle is overheating:
The high engine coolant temperature warning light comes on:
The engine may be overheating.
Follow the correction procedure as described blow.
Correction procedures
STEP 1
Stop the vehicle in a safe place and turn off the automatic air
conditioning system.
STEP 2
Check to see if steam is coming out from under the hood.
If you see steam:
Stop the engine and carefully lift the hood.
If you do not see steam:
Leave the engine running and carefully lift the hood.
STEP 3
Remove the engine compartment cover. (→P. 365)
STEP 4
Check to see if the cooling fan is operating.
If the fan is operating:
Wait until the engine coolant temperature gauge begins to
fall and then stop the engine.
If the fan is not operating:
Stop the hybrid system immediately and call your local Toy-
ota dealer.
STEP 5
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PRIUS_U_(L/O_0802)
After the hybrid system has
cooled down sufficiently, check
the coolant level and inspect the
radiator core (radiator) for any
leaks.
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