key TOYOTA COROLLA HYBRID 2020 (in English) Service Manual

3816-4. Other interior features
COROLLA HV_U
6
Interior features
1 To set the visor in the for-
ward position, flip it down.
2 To set the visor in the side
position, flip down, unhook,
and swing it to the side.
3 To use the side extender,
place the visor in the side
position, then slide it back-
ward.
Slide the cover to open.
The vanity lig ht turns on.
■To prevent 12-volt battery dis-
charge
If the vanity lights remain on when
the power switch is OFF, the lights
will go off automatically after 20 min-
utes.
NOTICE
●When wireless keys (that emit
radio waves) other than those of
your vehicle are being used
nearby.
If in situations other than above
the wireless charger does not
operate properly or the operation
indicator light is blinking, the wire-
less charger may be malfunction-
ing. Contact your Toyota dealer.
■To prevent failu re or damage
to data
●Do not bring magnetic cards,
such as a credit card, or mag-
netic recording media, close to
the wireless charger while
charging. Otherwise, data may
be erased due to the influence
of magnetism.
Additionally, do not bring preci-
sion instruments such as wrist
watches, close to the wireless
charger, as such objects may
malfunction.
●Do not leave portable devices in
the cabin. The temperature
inside the cabin may become
high when parked in the sun,
and cause damage to the
device.
■To prevent 12-vo lt battery dis-
charge
Do not use the wireless charger
for a long period of time with the
hybrid system stopped.
Sun visors
Va n i t y m i r r o r s

391
COROLLA HV_U
7
7
Maintenance and care
Maintenance and care
.7-1. Maintenance and careCleaning and protecting the vehicle exterior .......... 392
Cleaning and protecting the vehicle interior ........... 394
7-2. Maintenance Maintenance requirements.................................. 397
General maintenance.. 398
Emission inspection and maintenance (I/M) pro-
grams ........................ 401
7-3. Do-it-yourself mainte- nance
Do-it-yourself service pre- cautions ..................... 402
Hood ........................... 404
Positioning a floor jack .................................. 405
Engine compartment ... 406
Tires ............................ 413
Tire inflation pressure.. 422
Wheels ......... ...............424
Air conditioning filter .... 426
Cleaning the hybrid battery (traction battery) air intake
vent and filter............. 427
Electronic key battery.. 431
Checking and replacing fuses.......................... 433
Light bulbs................... 435

3927-1. Maintenance and care
COROLLA HV_U
7-1.Maintenance and care
Working from top to bottom,
liberally apply water to the
vehicle body, wheel wells and
underside of the vehicle to
remove any dirt and dust.
 Wash the vehicle body using
a sponge or soft cloth, such
as a chamois.
 For hard-to-remove marks,
use car wash soap and rinse
thoroughly with water.
 Wipe away any water.
 Wax the vehicle when the
waterproof coating deterio-
rates.
If water does not bead on a clean
surface, apply wax when the vehi-
cle body is cool.
■Automatic car washes
●Fold the mirrors before washing
the vehicle. Start washing from the
front of the vehicle. Make sure to
extend the mirrors before driving.
●Brushes used in automatic car
washes may scratch the vehicle
surface and harm your vehicle’s
paint.
■High pressure car washes
As water may ent er the cabin, do not bring the nozzle tip near the
gaps around the doors or perimeter
of the windows, or spray these
areas continuously.
■When using a car wash
If the door handle becomes wet
while the electronic key is within the
effective range, the door may lock
and unlock repeatedly. In that case,
follow the following correction pro-
cedures to wash the vehicle:
●Place the key in a position 6 ft. (2
m) or more separate from the
vehicle while the vehicle is being
washed. (Take care to ensure that
the key is not stolen.)
●Set the electronic key to bat-
tery-saving mode to disable the
smart key system. ( P.112)
■Aluminum wheels
●Remove any dirt immediately by
using a neutral detergent.
●Wash detergent off with water
immediately after use.
●To protect the paint from damage,
make sure to obs erve the follow-
ing precautions.
• Do not use acidic, alkaline or abrasive detergent
• Do not use hard brushes
• Do not use detergent on the wheels when they are hot, such
as after driving or parking in hot
weather
■Bumpers
Do not scrub with abrasive cleaners.
Cleaning and protect-
ing the vehicle exte-
rior
Perform cleaning in a man-
ner appropriate to each
component and its material.
Cleaning instructions
WA R N I N G
■When washing the vehicle
Do not apply water to the inside of
the engine compartment. Doing
so may cause the electrical com-
ponents, etc. to catch fire.

4117-3. Do-it-yourself maintenance
COROLLA HV_U
7
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 power switch on
the charger is off when connecting
and disconnecting the charger
cables to the 12-volt battery.
■After recharging/reconnecting
the 12-volt battery
●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 ma y be a serious
problem.
12-volt battery
WA R N I N G
■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:
●Do not cause sparks by touch-
ing the 12-volt battery terminals
with tools.

4317-3. Do-it-yourself maintenance
COROLLA HV_U
7
Maintenance and care
■If the electronic key battery is
depleted
The following symptoms may occur:
●The smart key system and wire-
less remote contr ol will not func-
tion properly.
●The operational range will be
reduced.
 Flathead screwdriver
 Small flathead screwdriver
 Lithium battery CR2032
■Use a CR2032 lithium battery
●Batteries can be purchased at
your Toyota dealer, local electrical
appliance shops or camera stores.
●Replace only with the same or
equivalent type recommended by
the manufacturer.
●Dispose of used ba tteries accord-
ing to local laws.
1 Release the lock and remove
the mechanical key.
2 Remove the key cover.
To prevent damage to the key,
cover the tip of the flathead screw-
driver with a rag.
3Remove the depleted battery
using a small flathead screw-
driver.
When removing the cover, the elec-
tronic key module may stick to the
cover and the batt ery may not be
visible. In this case, remove the
electronic key module in order to
remove the battery.
Insert a new battery with the “+” ter-
Electronic key batter y
Replace the battery with a
new one if it is depleted.
As the key may be damaged
if the following procedure is
not performed properly, it is
recommended that key bat-
tery replacement be per-
formed by your Toyota
dealer.
Items to prepare
Replacing the battery

4327-3. Do-it-yourself maintenance
COROLLA HV_Uminal facing up.
4
When installing the key cover
and mechanical key, install
by conducting step 2 and
step 1 with the directions
reversed.
5 Operate the or switch
and check that the doors can
be locked/unlocked.
WA R N I N G
■Removed battery and other
parts
These parts are small and if swal-
lowed by a child, they can cause
choking. Keep away from chil-
dren. Failure to do so could result
in death or serious injury.
NOTICE
■When replacing the battery
Use a flathead screwdriver of
appropriate size. Applying exces-
sive force may deform or damage
the cover.
■For normal operation after
replacing the battery
Observe the following precautions
to prevent accidents:
●Always work with dry hands.
Moisture may cau se the battery
to rust.
●Do not touch or move any other
component inside the remote
control.
●Do not bend either of the battery
terminals.

441
COROLLA HV_U
8
8
When trouble arises
When trouble arises
.8-1. Essential informationEmergency flashers .... 442
If your vehicle has to be stopped in an emergency.................................. 443
If the vehicle is trapped in rising water ................ 444
8-2. Steps to take in an emer- gency
If your vehicle needs to be towed......................... 445
If you think something is wrong ........................ 448
If a warning light turns on or a warning buzzer sounds.................................. 450
If a warning message is dis- played........................ 459
If you have a flat tire (vehi- cles without spare tire)
.................................. 462
If you have a flat tire (vehi- cles with a spare tire).................................. 473
If the hybrid system will not start ........................... 481
If you lose your keys ... 482
If the fuel filler door cannot be opened ................. 483
If the electronic key does not operate properly .. 483
If the 12-volt battery is dis- charged ..................... 485If your vehicle overheats
.................................. 489
If the vehicle becomes stuck .................................. 492

4618-2. Steps to take in an emergency
COROLLA HV_U
8
When trouble arises
■If “Radar Cruise Control
Unavailable S ee Owner's Man-
ual” is displayed
The dynamic radar cruise control
with full-speed range system is sus-
pended temporarily or until the prob-
lem shown in the message is
resolved. (causes a nd coping meth-
ods: P.172)
■If “Radar Cruise Control
Unavailable” is displayed
The dynamic radar cruise control
with full-speed range system cannot
be used temporarily. Use the system
when it becomes available again.
■If “Maintenance Required
Soon” is displayed
Indicates that all maintenance
according to the dr iven distance on
the maintenance schedule
* should
be performed soon.
Comes on approximately 4500
miles (7200 km) after the message
has been reset. If necessary, per-
form maintenance. Please reset the
message after the maintenance is
performed. ( P.398)
*: Refer to the separate “Scheduled
Maintenance” or “Owner’s Man-
ual Supplement” for the mainte-
nance interval applicable to your
vehicle.
■If “Maintenance Required Visit
Your Dealer” is displayed
Indicates that all maintenance is
required to correspond to the driven
distance on the maintenance sched-
ule
*.
Comes on approximately 5000
miles (8000 km) after the message
has been reset. (The indicator will
not work properly unless the mes-
sage has been reset.) Perform the
necessary maintenance. Please
reset the message after the mainte-
nance is performed. ( P.398)
*: Refer to the separate “Scheduled Maintenance” or
“Owner’s Man-
ual Supplement” for the mainte-
nance interval applicable to your
vehicle.
■If a message that indicates the
need for visiting your Toyota
dealer is displayed
The system or part shown on the
multi-information di splay is malfunc-
tioning. Have the vehicle inspected
by your Toyota dealer immediately.
■If a message that indicates the
need for referring to Owner’s
Manual is displayed
●If “Engine Coolant Temp High” is
displayed, follow t he instructions
accordingly. ( P.489)
●If any of the following messages
are displayed on the multi-infor-
mation display, it may indicate a
malfunction. Hav e the vehicle
inspected by your Toyota dealer
immediately.
• “Smart Key System Malfunction”
• “Hybrid System Malfunction”
• “Check Engine”
• “Hybrid Battery System Malfunc-
tion”
• “Accelerator System Malfunction”
●If any of the following messages
are displayed on the multi-infor-
mation display, it may indicate a
malfunction. Immediately stop the
vehicle and contact your Toyota
dealer.
• “Braking Power Low”
• “Charging System Malfunction”
• “Oil Pressure Low”
●If any of the following messages
are shown on the multi-informa-
tion display, the vehicle may have
run out of fuel. Stop the vehicle in
a safe place and, if the fuel level is
low, refuel the vehicle. ( P. 7 1 )
• “Hybrid System Stopped”
• “Engine Stopped”
●If “Maintenance Required for Trac-
tion Battery Cooling Parts See
Owner's Manual” is shown, the fil-
ters may be clogged, the air intake

4818-2. Steps to take in an emergency
COROLLA HV_U
8
When trouble arises
One of the following may be the
cause of the problem:
 The electronic key may not be
functioning properly.
( P.483)
 There may not be sufficient
fuel in the vehicle’s tank.
Refuel the vehicle.
 There may be a malfunction
in the immobilizer system.
( P. 7 5 )
 There may be a malfunction
in the steering lock system.
 The hybrid system may be
malfunctioning due to an elec-
trical problem such as elec-
tronic key battery depletion or
a blown fuse. However,
depending on the type of mal-
function, an interim measure
is available to start the hybrid
system. ( P.481) One of the following may be the
cause of the problem:

The 12-volt battery may be
discharged. ( P.485)
 The 12-volt battery terminal
connections may be loose or
corroded. ( P.411)
One of the following may be the
cause of the problem:
 The 12-volt battery may be
discharged. ( P.485)
 One or both of the 12-volt bat-
tery terminals may be discon-
nected. ( P.411)
Contact your Toyota dealer if the
problem cannot be repaired, or if
repair procedures are unknown.
When the hybrid system does
not start, the following steps can
be used as an interim measure
to start the hybrid system if the
power switch is functioning nor-
mally.
Do not use this starting proce-
dure except in case of emer-
If the hybrid system
will not start
Reasons for the hybrid sys-
tem not starting vary
depending on the situation.
Check the following and
perform the appropriate
procedure:
The hybrid system will not
start even though the cor-
rect starting procedure is
being followed. ( P.143)
The interior lights and
headlights are dim, or the
horn does not sound or
sounds at a low volume.
The interior lights and
headlights do not turn on,
or the horn does not
sound.
Emergency start function

4828-2. Steps to take in an emergency
COROLLA HV_U
gency.
1Set the parking brake.
( P.153)
2 Check that the shift lever is in
P.
3 Turn the power switch to
ACC.
4 Press and hold the power
switch for about 15 seconds
while depressing the brake
pedal firmly.
Even if the hybrid system can be
started using the above steps, the
system may be malfunctioning.
Have the vehicle inspected by your
Toyota dealer.
If you lose your keys
New genuine keys can be
made by your Toyota dealer
using another mechanical
key and the key number
stamped on your key num-
ber plate.
Keep the plate in a safe
place such as your wallet,
not in the vehicle.
NOTICE
■When an electronic key is lost
If the electronic key remains lost,
the risk of vehicle theft increases
significantly. Visit your Toyota
dealer immediately with all
remaining electronic keys that
were provided with your vehicle.