warning light TOYOTA COROLLA HYBRID 2021 (in English) Service Manual

4858-2. Steps to take in an emergency
COROLLA HV_U
8
When trouble arises
temporarily drops, the electric power
steering system warning light may
come on and the warning buzzer
may sound.
■When the tire pressure warning
light comes on (vehicles with a
tire pressure warning system)
Inspect the tires to check if a tire is
punctured.
If a tire is punctured: P.490, 501
If none of the tires are punctured:
Turn the power switch off then turn it
to ON. Check if the tire pressure
warning light comes on or blinks.
If the tire pressure warning light
blinks for approxi mately 1 minute
then stays on
There may be a malfunction in the
tire pressure warning system. Have
the vehicle inspected by your Toyota
dealer immediately.
If the tire pressure warning light
comes on
1 After the temperature of the tires
has lowered sufficiently, check
the inflation pressure of each tire
and adjust them to the specified
level.
2 If the warning light does not turn
off even after several minutes
have elapsed, check that the
inflation pressure of each tire is
at the specified level and perform
initialization. ( P.447)
■The tire pressure warning light
may come on due to natural
causes (vehicles with a tire
pressure warning system)
The tire pressure warning light may
come on due to natural causes such
as natural air leaks and tire inflation
pressure changes caused by tem-
perature. In this case, adjusting the
tire inflation pressure will turn off the
warning light (afte r a few minutes).
■When a tire is replaced with a
spare tire (vehicl es with a tire
pressure warning system)
Vehicles with a compact spare tire: The compact spare tire is not
equipped with a tire pressure warn-
ing valve and tran
smitter. If a tire
goes flat, the tire pressure warning
light will not turn off even though the
flat tire has been replaced with the
spare tire. Replac e the spare tire
with the repaired tire and adjust the
tire inflation pressure. The tire pres-
sure warning light will go off after a
few minutes.
■Conditions that the tire pres-
sure warning system may not
function properly (vehicles with
a tire pressure warning system)
 P.444
WA R N I N G
■If both the ABS and the brake
system warning lights remain
on
Stop your vehicle in a safe place
immediately and contact your Toy-
ota dealer.
The vehicle will become
extremely unstable during brak-
ing, and the ABS system may fail,
which could cause an accident
resulting in death o r serious injury.
■When the electric power
steering system warning light
comes on
When the light comes on yellow,
the assist to the power steering is
restricted. When the light comes
on red, the assis t to the power
steering is lost and handling oper-
ations of the steering wheel
become extremely heavy.
When steering wheel operations
are heavier than usual, grip the
steering wheel firmly and operate
it using more fo rce than usual.

4868-2. Steps to take in an emergency
COROLLA HV_U
WA R N I N G
■If the tire pressure warning
light comes on (vehicles with
a tire pressure warning sys-
tem)
Be sure to observe the following
precautions.
Failure to do so could cause a
loss of vehicle control and result
in death or serious injury.
●Stop your vehicle in a safe place
as soon as possible. Adjust the
tire inflation pressure immedi-
ately.
●Vehicles with a compact spare
tire: If the tire pr essure warning
light comes on ev en after tire
inflation pressure adjustment, it
is probable that you have a flat
tire. Check the ti res. If a tire is
flat, change it with the spare tire
and have the flat tire repaired by
the nearest Toy ota dealer.
●Vehicles with emergency tire
puncture repair kit: If the tire
pressure warning light comes
on even after tire inflation pres-
sure adjustment, it is probable
that you have a flat tire. Check
the tires. If a tire is flat, repair
the flat tire by using emergency
tire puncture repair kit.
●Avoid abrupt maneuvering and
braking.
If the vehicle tires deteriorate,
you could lose control of the
steering wheel or the brakes.
■If a blowout or sudden air
leakage should occur (vehi-
cles with a tire pressure warn-
ing system)
The tire pressure warning system
may not activate immediately.
■Maintenance of the tires
Each tire, includi ng the spare (if
provided), should be checked
monthly when cold and inflated to
the inflation pressure recom-
mended by the vehicle manufac-
turer on the vehicle placard or tire
inflation pressure label (tire and
load information label). (If your
vehicle has tires of a different size
than the size in dicated on the
vehicle placard or tire inflation
pressure label [tire and load infor-
mation label], you should deter-
mine the proper tire inflation
pressure for those tires.)
As an added safety feature, your
vehicle has been equipped with a
tire pressure monitoring system
(TPMS-tire pressure warning sys-
tem) that illuminates a low tire
pressure telltale (tire pressure
warning light) w hen one or more
of your tires is significantly
under-inflated. Accordingly, when
the low tire pressure telltale (tire
pressure warning light) illumi-
nates, you should stop and check
your tires as soon as possible,
and inflate them to the proper
pressure. Driving on a signifi-
cantly under-inflat ed tire causes
the tire to overhea t and can lead
to tire failure. Under-inflation also
reduces fuel efficiency and tire
tread life, and may affect the vehi-
cle’s handling and stopping ability.
Please note that the TPMS (tire
pressure warning system) is not a
substitute for proper tire mainte-
nance, and it is the driver’s
responsibility to m aintain correct
tire pressure, even if under-infla-
tion has not reached the level to
trigger illuminati on of the TPMS
low tire pressure te lltale (tire pres-
sure warning light).

4878-2. Steps to take in an emergency
COROLLA HV_U
8
When trouble arises■Warning messages
The warning messages explained
below may differ from the actual
messages according to operation
conditions and vehicle specifica-
tions.
■Warning buzzer
A buzzer may sound when a mes-
sage is displayed.
The buzzer may not be audible if the
vehicle is in a noisy location or if the
audio system volume is high.
■If “Engine Oil Level Low Add or
Replace” is displayed
The engine oil level is low. Check
WA R N I N G
Your vehicle has also been
equipped with a TPMS (tire pres-
sure warning system) malfunc-
tion indicator to indicate when the
system is not opera ting properly.
The TPMS (tire pressure warning
system) malfunction indicator is
combined with th e low tire pres-
sure telltale (tire pressure warning
light). When the system detects a
malfunction, the telltale will flash
for approximately one minute and
then remain continuously illumi-
nated. This sequence will con-
tinue upon subsequent vehicle
start-ups as long as the malfunc-
tion exists. When the malfunction
indicator is illu minated, the sys-
tem may not be able to detect or
signal low tire pressure as
intended.
TPMS (tire pressure warning sys-
tem) malfunctions may occur for a
variety of reasons, including the
installation of replacement or
alternate tires or wheels on the
vehicle that prevent the TPMS
(tire pressure warning system)
from functioning properly. Always
check the TPMS (tire pressure
warning system) malfunction tell-
tale after replacing one or more
tires or wheels on your vehicle to
ensure that the r eplacement or
alternate tires and wheels allow
the TPMS (tire pressure warning
system) to continue to function
properly.
NOTICE
■To ensure the tire pressure
warning system operates
properly (vehicles with a tire
pressure warning system)
Do not install tires with different
specifications or makers, as the
tire pressure warning system may
not operate properly.
If a war ning message
is displayed
The multi-information dis-
play shows warnings for
system malfunctions and
incorrectly performed oper-
ations, and messages that
indicate a need for mainte-
nance. When a message is
displayed, perform the
appropriate corrective
action for the message.
If a warning message is dis-
played again after the
appropriate actions have
been performed, contact
your Toyota dealer.
Additionally, if a warning
light comes on or flashes at
the same time that a warn-
ing message is displayed,
take the appropriate correc-
tive action for the warning
light. ( P.478)

4988-2. Steps to take in an emergency
COROLLA HV_U
(P.529): Proceed to step
23.
22 Turn the compressor switch
on to inflate the tire until the
specified air pressure is
reached. Drive for about 3
miles (5 km) and then per-
form step 20.
23 Attach the air release cap to
the end of the hose.
If the air release cap is not
attached, the sealant may leak and
the vehicle ma y get dirty.
24Store the bottle in the trunk
while it is connected to the
compressor.
25 Taking precautions to avoid
sudden braking, sudden
acceleration and sharp turns,
drive carefully at under 50
mph (80 km/h) to the nearest
Toyota dealer that is less
than 62 miles (100 km) away
for tire repair or replacement.
When having the tire repaired or
replaced, make sure to tell the Toy-
ota dealer that the sealant is
injected.
■If the tire is in flated to more
than the specifi ed air pressure
1 Disconnect the hose from the
valve.
2 Install the air release cap to the
end of the hose and push the
protrusion on the air release cap
into the tire valve to let some air
out.
3 Disconnect the hose from the
valve, remove the air release cap
from the hose an d then recon-
nect the hose.
4 Turn the compressor switch on
and wait for seve ral seconds,
and then turn it off. Check that
the air pressure indicator shows
the specified air pressure.
(  P.529)
If the air pressure is under the des-
ignated pressure, turn the compres-
sor switch on again and repeat the
inflation procedure until the speci-
fied air pressure is reached.
■The valve of a tire that has been
repaired (vehicles without a tire
pressure warning system)
After a tire is repaired with the emer-
gency tire puncture repair kit, the
valve should be replaced.
■After a tire is re paired with the
emergency tire puncture repair
kit (vehicles with a tire pressure
warning system)
●The tire pressure warning valve
and transmitter should be
replaced.
●Even if the tire inflation pressure is
at the recommended level, the tire
pressure warning light may come

5078-2. Steps to take in an emergency
COROLLA HV_U
8
When trouble arises
the compact spare tire after the tire
pressure warning light comes on,
the light remains on.
■If you have a flat front tire on a
road covered with snow or ice
Install the compact spare tire on one
of the rear wheels of the vehicle.
Perform the following steps and fit
tire chains to the front tires:
1 Replace a rear tire with the com-
pact spare tire.
2 Replace the flat front tire with the
tire removed from the rear of the
vehicle.
3 Fit tire chains to the front tires.
■When reinstalling the wheel
ornament (except compact
spare tire)
Align the cutout o f the wheel orna-
ment with the valve stem as shown
in the illustration.
WA R N I N G
■When using the compact
spare tire
●Remember that the compact
spare tire provided is specifi-
cally designed for use with your
vehicle. Do not use your com-
pact spare tire on another vehi-
cle.
●Do not use more than one com-
pact spare tires simultaneously.
●Replace the compact spare tire
with a standard tire as soon as
possible.
●Avoid sudden acceleration,
abrupt steering, sudden brak-
ing and shifting operations that
cause sudden engine braking.
■When the compact spare tire
is attached
The vehicle speed may not be
correctly detected, and the follow-
ing systems may not operate cor-
rectly:
• ABS & Brake assist
• VSC
•TRAC
• Automatic High Beam
• Dynamic radar cruise control with full-speed range
• EPS
• PCS (Pre-Collision System)
• LTA (Lane Tracing Assist)
• Tire pressure warning system (if equipped)
• BSM (Blind Spot Monitor) (if equipped)
• RCTA (Rear Cross Traffic Alert) function (if equipped)
• Rear view monitor system
■Speed limit when using the
compact spare tire
Do not drive at speeds in excess
of 50 mph (80 km /h) when a com-
pact spare tire is installed on the
vehicle.
The compact spare tire is not
designed for driving at high
speeds. Failure to observe this
precaution may lead to an acci-
dent causing death or serious
injury.

5299-1. Specifications
COROLLA HV_U
9
Vehicle specifications
*1: Minimum pedal clearance when de pressed with a force of 67.4 lbf (300
N, 30.6 kgf) while the hyb rid system is operating.
*2: Make sure to confirm that the brake system warning light (yell ow) does
not illuminate. (If th e brake system warning light illuminates, refer to
P.478.)
Ty p e A
Parking brake indicator*2
When pulling th e parking brake switch for
1 to 2 seconds: comes on
When pushing the parking brake switch for
1 to 2 seconds: turns off
Fluid typeFMVSS No.116 DOT 3 or SAE J1703
FMVSS No.116 DOT 4 or SAE J1704
Steering
Free playLess than 1.2 in. (30 mm)
Tires and wheels
Tire size195/65R15 91S, T125/70D17 98M
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Front
38 psi (260 kPa, 2.6 kgf/cm
2 or bar)
Rear
36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Spare
60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
Wheel size15  6 1/2J, 17  4T (compact spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

565What to do if... (Troubleshooting)
COROLLA HV_U
 Is the power switch in ON?
If you cannot release the shift lever
by depressing the brake pedal with
the power switch in ON. ( P.165)
 It is locked automatically to
prevent theft of the vehicle.
( P.158)
 Is the window lock switch
pressed?
The power window except for the
one at the driver’s seat cannot be
operated if the win dow lock switch
is pressed. ( P.144)
 The auto power off function
will be operated if the vehicle
is left in ACC or ON (the
hybrid system is not operat-
ing) for a period of time.
( P.160)
 The seat belt reminder light is flashing
Are the driver and the passenger
wearing the seat belts? (
P.481)
 The parking brake indicator is
on
Is the parking br ake released?
(  P.167)
Depending on the situation,
other types of warning buzzer
may also sound. ( P.478, 487)
 Did anyone inside the vehicle
open a door during setting the
alarm?
The sensor detects it and the alarm
sounds. ( P. 9 0 )
Do one of the following to deac-
tivate or stop the alarms:
 Unlock the doors.
 Turn the power switch to ACC
or ON, or start the hybrid sys-
tem. (The alarm will be deacti-
vated or stopped after a few
seconds.)
 Is the electronic key left inside
the vehicle?
Check the message on the
multi-informat ion display. (P.487)
The shift lever cannot be
shifted from P even if you
depress the brake pedal
The steering wheel can-
not be turned after the
hybrid system is stopped
The windows do not open
or close by operating the
power window switches
The power switch is
turned off automatically
A warning buzzer sounds
during driving
An alarm is activated and
the horn sounds
A warning buzzer sounds
when leaving the vehicle

566What to do if... (Troubleshooting)
COROLLA HV_U
 When a warning light turns on
or a warning message is dis-
played, refer to P.478, 487.
 Vehicles with an emergency
tire puncture repair kit: Stop
the vehicle in a safe place and
repair the flat tire temporarily
with the emergency tire punc-
ture repair kit. ( P.490)
 Vehicles with a spare tire:
Stop the vehicle in a safe
place and replace the flat tire
with the spare tire. ( P.501)
 Try the procedure for when
the vehicle becomes stuck in
mud, dirt, or snow. ( P.520)
A warning light turns on
or a warning message is
displayed
When a problem has
occurred
If you have a flat tire
The vehicle becomes
stuck

567Alphabetical Index
COROLLA HV_U
Alphabetical Index
A
A/C Air conditioning filter ............. 454
Automatic air conditioning sys-tem ..................................... 386
ABS (Anti-lock Brake System) ............................................... 240Warning light ........................ 480
ACA (Active Cornering Assist) ............................................... 240
Active Cornering Assist (ACA) ............................................... 240
Air conditioning filter ............. 454
Air conditioning system Air conditioning filter ............. 454
Automatic air conditioning sys-tem ..................................... 386
Airbags Airbag operating conditions.... 33
Airbag precautions for your child............................................. 36
Correct driving posture ........... 25
Curtain shield airbag operating conditions ............................. 34
Curtain shield airbag precautions ............................................. 36
Front passenger occupant clas- sification system ................... 41
General airbag precautions .... 36
Locations of airbags ............... 31
Modification and disposal of air- bags ..................................... 39
Side airbag operating conditions ............................................. 34
Side airbag precautions ......... 36
Side and curtain shield airbags operating conditions ............. 34
Side and curtain shield airbags precautions........................... 36
SRS airbags ........................... 31
SRS warning light................. 480 Alarm
Alarm ......................................90
Warning buzzer ....................478
AM ............................................303
Anchor brackets ... ..............50, 68
Android Auto ...........................314
Antennas (smart key system)125
Anti-lock Brake System (ABS) ...............................................240Warning light.........................480
Apple CarPlay/Android Auto .284 Troubleshooting ....................287
Approach warning ..................214
Apps button (Menu screen) ...255
Armrest ......... ......................... ..410
Assist grips .............................410
Audio .......................................298 Audio source ........................299
Operating information ...........322
Reordering the audio source 299
Screen adjustment ...............301
Some basics .........................299
Sound settings......................300
Turning the sys tem on and off
...........................................299
USB port ...............................300
Voice command system .......302
AUDIO button ..........................253
Audio button (Menu screen) ..255
Audio buttons overview .........253
Audio settings.........................321 Common settings .................321
Radio settings.......................321
Audio source...........................299
Audio system-linked display .107
Automatic air conditioning sys- tem .........................................386
Automatic High Beam ............175
Automatic light control system ...............................................174
Average fuel economy ...........104
Average vehicle speed ...........107

568Alphabetical Index
COROLLA HV_U
B
Back-up lights Replacing light bulbs ............ 466
Wattage ................................ 530
Battery (12-volt battery) Battery checking................... 439
If the 12-volt battery is dis-charged .............................. 513
Preparing and c hecking before
winter.................................. 247
Warning light ........................ 479
Battery (traction battery) ......... 83
Blind Spot Monitor (BSM) ...... 221
Bluetooth
® audio .................... 315
Registering/Conn ecting a Blue-
tooth
® device...................... 317
Bluetooth® button (Setup
screen) .................................. 258
Bluetooth
® details settings ... 272
Bluetooth® setup screen ...... 273
Connecting a Bluetooth® device
........................................... 273
Deleting a Bluetooth
® device275
Detailed settings screen ....... 277
Displaying the Bluetooth
® setup
screen ................................ 272
Editing the Bluetooth
® device
information ......................... 276
Registering a Bluetooth
® device
........................................... 275
Bluetooth
® device information
............................................... 276
Bluetooth
® hands-free system
............................................... 343
Bluetooth
® phone message func-
tion......................................... 354 Calling the message sender. 357
Checking received messages ........................................... 355
Displaying the message screen ........................................... 354 Receiving a mess
age ...........354
Replying to a message (dicta- tion reply)............................356
Replying to a message (quick reply) ..................................356
Bottle holders .........................398
Brake Brake hold ............................170
Fluid..............................438, 528
Parking brake .......................167
Regenerative braking .............81
Warning light.........................478
Brake assist ............................240
Break-in tips ............................147
Brightness control Instrument panel light control101
BSM (Blind Spot Monitor) ......221
C
Care Exterior .................................420
Interior ..................................422
Seat belts .............................422
Wheels and wheel ornaments...........................................420
Cargo capacity ........................155
Chains......................................248
Child restraint system Fixed with a LATCH system ...64
Fixed with a seat belt..............59
Front passenger occupant clas-sification system ...................41
Points to remember ................48
Riding with children ................47
Types of child restraint system installation method ...............50
Using an anchor bracket ........68
Child safety 12-volt battery precautions .439, 516
Airbag precautions .................36
Child restraint system .............50