Toyota PRIUS Owner's Manual page 651

If "Hybrid System Overheated" is shown on the multi-informa-
■
tion display
Stop the vehicle in a safe place.
1
Stop the hybrid system and carefully lift the hood.
2
After the hybrid system has cooled down, inspect the hoses and
3
radiator core (radiator) for any leaks.
Radiator
1
Cooling fans
2
If a large amount of coolant
leaks, immediately contact
any authorized Toyota dealer
or repairer, or another duly
qualified and equipped pro-
fessional.
The coolant level is satisfactory if it is between the "FULL" and
4
"LOW" lines on the reservoir.
Reservoir
1
"FULL" line
2
"LOW" line
3
Add coolant if necessary.
5
Water can be used in an emer-
gency if coolant is unavailable.
If water was added in an emer-
gency,
inspected at any authorized
Toyota dealer or repairer, or
another
equipped professional as soon
as possible.
PRIUS_OM_OM47A31E_(EE)
7-2. Steps to take in an emergency
have the vehicle
duly qualified and
651
7