Page 79 of 618

791-4. Hybrid system
Owners Manual_USA_M0C031_en
1
For safety and security
There are an air intake vents 
under the rear seat for the pur-
pose of cooling the hybrid bat-
tery (traction battery). If the 
vents becomes blocked, the 
hybrid battery (traction battery) 
input and output may be 
reduced. When a certain level of impact is 
detected by the impact sensor, 
the emergency shut off system 
blocks the high voltage current 
and stops the fuel pump to mini-
mize the risk of electrocution 
and fuel leakage. If the emer-
gency shut off system activates, 
your vehicle will not restart. To 
restart the hybrid system, con-
tact your Toyota dealer.
A message is automatically dis-
played when a malfunction 
occurs in the hybrid system or 
an improper operation is 
attempted.
If a warning message is shown 
on the multi-information display, 
NOTICE
■Hybrid battery (traction bat-
tery) air intake vents
Do not carry large amounts of 
water such as water cooler bottles 
in the vehicle. If water spills onto 
the hybrid battery (traction bat-
tery), the batte ry may be dam-
aged. Have the vehicle inspected 
by your Toyota dealer.
Hybrid battery (traction 
battery) air intake vents
NOTICE
■Hybrid battery (traction bat-
tery) air intake vents
●Make sure that the air intake 
vents are not blocked, such as 
by a seat cover, plastic cover, or 
luggage. If the vents are 
blocked, the hybrid battery 
(traction battery) input and out-
put may be restricted, possibly 
leading to a malfunction.
●Clean the air intake vents regu-
larly to prevent the hybrid bat-
tery (traction b attery) from 
overheating.
●Do not get water or foreign 
materials in the air intake vents 
as this may cause a short circuit 
and damage the hybrid battery 
(traction battery).
●A filter is installed to the air 
intake vents. When the filter 
remains noticeably dirty even 
after cleaning the air intake 
vents, filter cleaning or replace-
ment is recommended. Refer to 
P.481 for details on how to 
clean the filters.
Emergency shut off sys-
tem
Hybrid warning message 
     
        
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4616-3. Do-it-yourself maintenance
Owners Manual_USA_M0C031_en
6
Maintenance and care
“LOW” line
If the level is on or below the “LOW” 
line, add coolant up to the “FULL” 
line. ( P.535)
■Coolant selection
Only use “Toyota Super Long Life 
Coolant” or a similar high quality 
ethylene glycol based non-silicate, 
non-amine, non-nitrite, and non-
borate coolant with long-life hybrid 
organic acid technology.
U.S.A.:“Toyota Super Long Life 
Coolant” is a mixture of 50% coolant 
and 50% deionized water.
(Minimum temperature: -31°F [-
35°C])
Canada: “Toyota Super Long Life 
Coolant” is a mixture of 55% coolant 
and 45% deionized water.
(Minimum temperature: -44°F [-
42°C])
For more details about coolant, con-
tact your Toyota dealer.
■If the coolant level drops within 
a short time of replenishing
Visually check the radiator, hoses, 
engine coolant reser voir cap, inter-
coolant reservoir cap, drain cock 
and water pump.
If you cannot find  a leak, have your 
Toyota dealer test the cap and 
check for leaks in the cooling sys-
tem.
Check the radiator, condenser 
and intercooler radiators and 
clear away any foreign objects. 
If either of the above parts is 
extremely dirty or you are not 
sure of their condition, have 
your vehicle inspected by your 
Toyota dealer.
■Checking fluid level
The brake fluid level should be 
between the “MAX” and “MIN” 
WARNING
■When the hybrid system is 
hot
Do not remove the coolant reser-
voir cap.
The cooling system may be under 
pressure and may spray hot cool-
ant if the cap is removed, causing 
serious injuries, such as burns.
NOTICE
■When adding coolant
Coolant is neither plain water nor 
straight antifreeze. The correct 
mixture of water and antifreeze 
must be used to provide proper 
lubrication, corrosion protection 
and cooling. Be sure to read the 
antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to 
prevent it from damaging parts or 
paint.
Checking the radiator, 
condenser and inter-
cooler radiators
WARNING
■When the hybrid system is 
hot
Do not touch the radiator, con-
denser or intercooler radiators or 
condenser as they may be hot 
and cause serious injuries, such 
as burns.
Checking and adding the 
brake fluid 
     
        
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4626-3. Do-it-yourself maintenance
Owners Manual_USA_M0C031_en
lines on the tank.
Brake fluid reservoir cap
“MAX” line
“MIN” line
■Adding fluid
Make sure to check the fluid 
type and prepare the necessary 
item.
 Fluid type
FMVSS No.116 DOT 3 or SAE 
J1703 brake fluid
Item
Clean funnel
■Brake fluid can absorb moisture 
from the air
Excess moisture in the brake fluid 
can cause a dangerous loss of brak-
ing efficiency. Use only newly 
opened brake fluid.
If any washer does not work the 
washer tank may be empty. Add 
washer fluid.
WARNING
■When filling the reservoir
Take care as brake fluid can harm 
your hands and eyes and damage 
painted surfaces.
If fluid gets on your hands or in 
your eyes, flush t he affected area 
with clean water immediately.
If you still experien ce discomfort, 
see a doctor.
NOTICE
■If the fluid level is low or high
It is normal for the brake fluid level 
to go down slight ly as the brake 
pads wear out or when the fluid 
level in the accumulator is high.
If the reservoir needs frequent 
refilling, there m ay be a serious 
problem.
Adding the washer fluid
WARNING
■When adding washer fluid
Do not add washer fluid when the 
hybrid system is hot or operating 
as washer fluid contains alcohol 
and may catch fire if spilled on the 
hybrid system, etc.
NOTICE
■Do not use any fluid other 
than washer fluid
Do not use soapy water or anti-
freeze instead of washer fluid.
Doing so may cause streaking on 
the vehicle’s painted surfaces, as 
well as damaging the pump lead-
ing to problems of the washer 
fluid not spraying.