Toyota Highlander Hybrid 2020, Owner'S Manual, Page: 498 / 572

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7-2. Steps to take in an emergency
HIGHLANDER HV_U
5
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
6
Start the hybrid system and
turn the air conditioning sys-
tem on to check that the radi-
ator cooling fan operates and
to check for coolant leaks
from the radiator or hoses.
The fan operates when the air con-
ditioning system is turned on imme-
diately after a cold start. Confirm
that the fan is operating by check-
ing the fan sound and air flow. If it is
difficult to check these, turn the air
conditioning system on and off
repeatedly. (The fan may not oper-
ate in freezing temperatures.)
7
If the fan is not operating:
Stop the hybrid system
immediately and contact your
Toyota dealer.
If the fan is operating:
Have the vehicle inspected at
the nearest Toyota dealer.
8
Check if “Engine Coolant
Temp High Stop in a Safe
Place See Owner's Manual”
is shown on the multi-infor-
mation display.
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.

If “Hybrid System Over-
heated Output Power
Reduced” is shown on the
multi-information display
1
Stop the vehicle in a safe
place.
2
Stop the hybrid system and
carefully lift the hood.
3
After the hybrid system has
cooled down, inspect the
hoses and radiator core (radi-
ator) for any leaks.
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
Radiator
Cooling fan
4
The coolant level is satisfac-
tory if it is between the