2023 TOYOTA COROLLA HYBRID brake fluid

1654-1. Before driving
4
Driving
When the following unusual
operation is performed with the
accelerator pedal depressed,
the hybrid system output may be
restrained.
When the shift lever is shifted
to R
*.
 When the shift lever is shifted
from P or R to forward drive
shift position such as D
*.
When the system op erates, a mes-
sage appears on the multi-informa-
tion display. Read the message and
follow the instruction.
*: Depending on the situation, the shift position may not be
changed.
■Drive-Start Control (DSC)
When the TRAC is turned off
(  P.267), sudden start restraint
control also does not operate. If
your vehicle have trouble escaping
from the mud or fr esh snow due to
sudden start restraint control opera-
tion, deactivate TRAC ( P.267) so
that the vehicle may become able to
escape from the mud or fresh snow.NOTICE
●Engine damage caused by
water immersion
In the event that you drive on a
flooded road an d the vehicle
becomes flooded or stuck in mud
or sand, be sure to have your Toy-
ota dealer check the following:
●Brake function
●Changes in quantity and quality
of oil and fluid used for the
engine, hybrid transmission,
etc.
●Lubricant condition for the bear-
ings and suspension joints
(where possible), and the func-
tion of all joints , bearings, etc.
Sudden start restraint
control (Drive-Start Con-
trol [DSC])

3106-2. Maintenance
General maintenance
Listed below are the general
maintenance items that
should be performed at the
intervals specified in the
“Owner’s Warranty Informa-
tion Booklet” or “Owner’s
Manual Supplement/Sched-
uled Maintenance Guide”. It
is recommended that any
problem you notice should
be brought to the attention
of your Toyota dealer or
qualified service shop for
advice.
WARNING
■If the hybrid system is operat-
ing
Turn the hybrid system off and
ensure that there is adequate
ventilation before performing
maintenance checks.
Engine compartment
ItemsCheck points
12-volt batteryCheck the connec-
tions. ( P.323)
Brake fluid
Is the brake fluid at
the correct level?
( P.322)
Engine/power
control unit
coolant
Is the
engine/power con-
trol unit coolant at
the correct level?
( P.320)
Engine oil
Is the engine oil at
the correct level?
( P.318)
Exhaust sys-
temThere should not
be any fumes or
strange sounds.
Radiator/con-
denser
The radiator and
condenser should
be free from for-
eign objects.
( P.321)
Washer fluid
Is there sufficient
washer fluid?
( P.324)
Vehicle interior
ItemsCheck points
Accelerator
pedal
The accelerator
pedal should move
smoothly (without
uneven pedal effort
or catching).
Brake pedal
• Does the brake
pedal move
smoothly?
• Does the brake pedal have
appropriate
clearance from
the floor?
( P.425)
• Does the brake pedal have the
correct amount
of free play?
( P.425)
ItemsCheck points

3116-2. Maintenance
6
Maintenance and care
Brakes
• The vehicle should not pull to
one side when
the brakes are
applied.
• The brakes should work
effectively.
• The brake pedal should not feel
spongy.
• The brake pedal should not get
too close to the
floor when the
brakes are
applied.
Head
restraints
Do the head
restraints move
smoothly and lock
securely?
Hybrid trans-
mission “Park”
mechanism
When parked on a
slope and the shift
lever is in P, is the
vehicle securely
stopped?
Indica-
tors/buzzersDo the indicators
and buzzers func-
tion properly?
LightsDo all the lights
come on?
Parking brake
• Does the park-ing brake oper-
ate normally?
• When parked on a slope and the
parking brake is
on, is the vehicle
securely
stopped?
ItemsCheck points
Seat belts
• Do the seat belts operate
smoothly?
• The seat belts should not be
damaged.
Seats
Do the seat con-
trols operate prop-
erly?
Steering wheel
• Does the steer-ing wheel rotate
smoothly?
• Does the steer- ing wheel have
the correct
amount of free
play?
• There should not be any strange
sounds coming
from the steer-
ing wheel.
Vehicle exterior
ItemsCheck points
Doors/trunkDo the doors/trunk
operate smoothly?
Engine hood
Does the engine
hood lock system
work properly?
Fluid leaks
There should not
be any signs of
fluid leakage after
the vehicle has
been parked.
ItemsCheck points

3146-3. Do-it-yourself maintenance
6-3.Do-it-yourself maintenance
Do-it-yourself ser vice
precautions
If you perform maintenance
by yourself, be sure to fol-
low the correct procedure
as given in these sections.
Maintenance
ItemsParts and tools
12-volt bat-
tery condi-
tion
( P.323)
•Warm water
• Baking soda
•Grease
• Conventional
wrench (for terminal
clamp bolts)
Brake fluid
level
( P.322)
• FMVSS No.116
DOT 3 or SAE
J1703 brake fluid
FMVSS No.116
DOT 4 or SAE
J1704 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake
fluid)
Engine/power
control unit
coolant level
( P.320)
• “Toyota Super Long
Life Coolant” or a
similar high quality
ethylene gly-
col-based non-sili-
cate, non-amine,
non-nitrite and
non-borate coolant
with long-life hybrid
organic acid tech-
nology
For the U.S.A.:
“Toyota Super Long
Life Coolant” is
pre-mixed with 50%
coolant and 50%
deionized water.
For Canada:
“Toyota Super Long
Life Coolant” is
pre-mixed with 55%
coolant and 45%
deionized water.
• Funnel (used only for adding coolant)
Engine oil
level
( P.318)
• “Toyota Genuine
Motor Oil” or equiva-
lent
• Rag or paper towel
• Funnel (used only for adding engine
oil)
Fuses
( P.354)• Fuse with same
amperage rating as
original
Hybrid bat-
tery (trac-
tion battery)
air intake
vent
( P.347)
• Vacuum cleaner,
etc.
ItemsParts and tools

3186-3. Do-it-yourself maintenance
Washer fluid tank ( P.324)
Engine coolant reservoir ( P.320)
Fuse boxes ( P.354)
Engine oil level dipstick ( P.319)
Engine oil filler cap ( P.319)
Power control unit coolant reservoir ( P.320)
Brake fluid reservoir ( P.322)
12-volt battery ( P.323)
Radiator ( P.321)
Condenser ( P.321)
Electric cooling fans
With the engine at operating temperature and turned off,
check the oil level on the dip-
stick.
Engine compar tment
Components
Checking and adding the
engine oil

3226-3. Do-it-yourself maintenance
■Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN”
lines on the tank.
■Adding fluid
1 Slide and lift up the rubber
strip to partly remove it as
shown.
2 Disconnect the claws and
remove the service cover. 3
Remove the reservoir cap.
4 Add brake fluid slowly while
checking the fluid level.
Make sure to check the fluid
type and prepare the necessary
item.
 Fluid typeFMVSS No.116 DOT 3 or SAE
J1703 brake fluid
FMVSS No.116 DOT 4 or SAE
J1704 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.
Checking and adding the
brake 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 the affected area
with clean water immediately.
If you still experi ence discomfort,
see a doctor.

3236-3. Do-it-yourself maintenance
6
Maintenance and care
Check the 12-volt battery as fol-
lows.
■12-volt battery exterior
Make sure that the 12-volt bat-
tery terminals are not corroded
and that there are no loose con-
nections, cracks, or loose
clamps.
Terminals
Hold-down clamp
■Before recharging
When recharging, the 12-volt bat-
tery produces hydrogen gas which
is flammable and explosive. There-
fore, observe the following precau-
tions before recharging:
●If recharging with the 12-volt bat-
tery installed on the vehicle, be
sure to disconnect the ground
cable.
●Make sure the charger is off when
connecting and disconnecting the
charger cables to the 12-volt bat-
tery.
■After recharging/reconnecting
the 12-volt battery (vehicles
with a smart key system)
●Unlocking the doors using the
smart key system may not be pos-
sible immediately after reconnect-
ing the 12-volt battery. If this
happens, use the wireless remote
control or the mechanical key to
lock/unlock the doors.
●Start the hybrid system with the
power switch in ACC. The hybrid
system may not start with the
power switch turned off. However,
the hybrid system will operate nor-
mally from the second attempt.
●The power switch mode is
recorded by the vehicle. If the
12-volt battery is reconnected, the
vehicle will return the power
switch mode to the status it was in
before the 1 2-volt battery was dis-
connected. Make sure to turn off
the power before disconnecting
the 12-volt battery. Take extra
care when connecting the 12-volt
battery if the power switch mode
prior to discharge is unknown.
If the system will not start even after
multiple attempts, contact your Toy-
ota dealer.
NOTICE
■If the fluid level is low or high
It is normal for the brake fluid level
to go down slightly as the brake
pads wear out or when the fluid
level in the accumulator is high.
If the reservoir needs frequent
refilling, there may be a serious
problem.
12-volt battery
WARNING
■Chemicals in the 12-volt bat-
tery
The 12-volt battery contains poi-
sonous and corrosive sulfuric acid
and may produce hydrogen gas
which is flammable and explosive.
To reduce the risk of death or seri-
ous injury, take the following pre-
cautions while working on or near
the 12-volt battery:

3707-2. Steps to take in an emergency
4Tighten down the towing eye-
let securely using a wheel nut
wrench (if equipped) or hard
metal bar.
5 Securely attach cables or
chains to the towing eyelet.
Take care not to damage the vehi-
cle body.
6Enter the vehicle being towed
and start the hybrid system.
If the hybrid system does not start,
turn the power switch to ON.
7Shift the shift lever to N and
release the parking brake.
Turn automatic mode off.
( P.184)
When the shift lever cannot
be shifted:  P. 1 8 1
■While towing
If the hybrid system is off, the power
assist for the brakes and steering
will not function, making steering
and braking more difficult.
■Wheel nut wrench
Vehicle without wheel nut wrench:
Wheel nut wrench can be pur-
chased at your Toyota dealer.
Vehicle with wheel nut wrench:
Wheel nut wrench is installed in
trunk. ( P.399)
 Fluid leaks under the vehicle.
(Water dripping from the air
conditioning after use is nor-
mal.)
 Flat-looking tires or uneven
tire wear
 Engine coolant temperature
gauge needle continually
points higher than normal.
 Changes in exhaust sound
 Excessive tire squeal when
cornering
 Strange noises related to the
suspension system
 Pinging or other noises
related to the hybrid system
 Engine missing, stumbling or
running roughly
 Appreciable loss of power
 Vehicle pulls heavily to one
If you think something
is wrong
If you notice any of the fol-
lowing symptoms, your
vehicle probably needs
adjustment or repair. Con-
tact your Toyota dealer as
soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms