Toyota Highlander Hybrid 2017 Owner's Manual page 633

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If "Hybrid System Overheated Reduced Output Power" is
shown on the multi-information display
Stop the vehicle in a safe place.
1
Stop the hybrid system and carefully lift the hood.
2
After the hybrid system has
3
cooled down, inspect the
hoses
(radiator) for any leaks.
1 Radiator
2 Cooling fans
If a large amount of coolant
leaks, immediately contact
your Toyota dealer.
The coolant level is satisfac-
4
tory if it is between the
"FULL" and "LOW" lines on
the reservoir.
1 Reservoir
2 "FULL"
3 "LOW"
Add coolant if necessary.
5
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and check the multi-information display.
6
If the message does not disappear:
Stop the hybrid system and contact your Toyota dealer.
If the message is not displayed:
Have the vehicle inspected at the nearest Toyota dealer.
HIGHLANDER_HV_U (OM48F12U)
8-2. Steps to take in an emergency
and radiator core
633
8