Toyota SIENNA 2022 Manual page 510

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510
7-2. Steps to take in an emergency
2
If you see steam:
Carefully lift the hood after
the steam subsides.
If you do not see steam:
Carefully lift the hood.
3
After the hybrid system has
cooled down sufficiently,
inspect the hoses and radia-
tor core (radiator) for any
leaks.
Radiator
A
Cooling fan
B
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
4
The coolant level is satisfac-
tory if it is between the
"FULL" and "LOW" lines on
the reservoir.
Reservoir
A
"FULL" line
B
"LOW" line
C
5
Add coolant if necessary.
Water can be used in an emer-
gency if engine coolant is unavail-
able.
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.

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