check engine TOYOTA COROLLA HYBRID 2020 (in English) Owner's Manual

4137-3. Do-it-yourself maintenance
COROLLA HV_U
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Maintenance and care
Check if the treadwear indica-
tors are showing on the tires.
Also check the tires for uneven
wear, such as excessive wear
on one side of the tread.
Check the spare tire condition
and pressure if not rotated. New tread
Worn tread
Treadwear indicator
The location of treadwear indicators
is shown by a “TWI” or “ ” mark,
WA R N I N G
■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
engine, etc.
NOTICE
■Do not use any fluid other
than washer fluid
Do not use soapy water or engine
antifreeze 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.
■Diluting washer fluid
Dilute washer flui d with water as
necessary.
Refer to the freezing tempera-
tures listed on the label of the
washer fluid bottle.
Tires
Replace or rotate tires in
accordance with mainte-
nance schedules and tread-
wear.
Checking tires

4337-3. Do-it-yourself maintenance
COROLLA HV_U
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Maintenance and care
1 Turn the power switch off.
2 Open the fuse box cover.
Engine compartment: type A
fuse box
Push the tabs in and lift the lid off.
Engine compartment: type B
fuse box
Push the tabs in and lift the lid off.
Under the driver’s side instru-
ment panel
Remove the lid.
Make sure to push the claw when
removing/installing the lid.
3Remove the fuse with the
pullout tool.
Only type A fuse can be
removed using the pullout
tool.
4 Check if the fuse is blown.
Replace the blown fuse with a new
fuse of an appropriate amperage
rating. The amperage rating can be
found on the fuse box lid.
Checking and replac-
ing fuses
If any of the electrical com-
ponents do not operate, a
fuse may have blown. If this
happens, check and replace
the fuses as necessary.
Checking and replacing
fuses

4598-2. Steps to take in an emergency
COROLLA HV_U
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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
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.450)

4608-2. Steps to take in an emergency
COROLLA HV_Uthe level of the engine oil, and add if
necessary.
This message may appear if the
vehicle is stopped on a slope. Move
the vehicle to a level surface and
check to see if the message disap-
pears.
■If “Hybrid System Stopped
Steering Power Low” is dis-
played
This message is displayed if the
hybrid system is stopped while driv-
ing.
When steering wheel operations are
heavier than usual, grip the steering
wheel firmly and operate it using
more force th an usual.
■If “Hybrid System Overheated
Output Power Reduced” is dis-
played
This message may be displayed
when driving under severe operat-
ing conditions. (For example, when
driving up a long steep hill.)
Handling method: P. 4 8 9
■If “Traction Battery Needs to be
Protected Refrain from the Use
of N Position” is displayed
This message may be displayed
when the shift lever is in N.
As the hybrid batte ry (traction bat-
tery) cannot be charged when the
shift lever is in N, shift the shift lever
to P when the vehicle is stopped.
■If “Traction Battery Needs to be
Protected Shift into P to
Restart” is displayed
This message is displayed when the
hybrid battery (traction battery)
charge has become extremely low
because the shift lever has been left
in N for a certain amount of time.
When operating the vehicle, shift to
P and restart the hybrid system.
■If “Shift is in N Release Acceler-
ator Before Shif ting” is dis-
played
The accelerator pedal has been depressed when the shift lever is in
N.
Release the accelerator pedal and
shift the shift
lever to D or R.
■If “Press Brake when Vehicle is
Stopped Hybrid System may
Overheat” is displayed
The message may be displayed
when the accelerator pedal is
depressed to hold the vehicle while
the vehicle is stopped on an incline,
etc. The hybrid system may over-
heat. Release the accelerator pedal
and depress the brake pedal.
■If “Auto Power OFF to Conserve
Battery” is displayed
Power was cut off due to the auto-
matic power off function. Next time
when starting the hybrid system,
operate the hybrid system for
approximately 5 minutes to
recharge the 12-volt battery.
■If “Headlight System Malfunc-
tion Visit Your Dealer” is dis-
played
The following systems may be mal-
functioning. Hav e the vehicle
inspected by your Toyota dealer
immediately.
●The LED headlight system
●Automatic High Beam
■If “Front Camera Unavailable”
or “Front Camera Unavailable
See Owner’s Manual” is dis-
played
The following systems may be sus-
pended until the problem shown in
the message is resolved. (P.172,
450)
●PCS (Pre-Collision system)
●LTA (Lane Tracing Assist)
●Automatic High Beam
●RSA (Road Sign Assist) (if
equipped)
●Dynamic radar cruise control with
full-speed range

4618-2. Steps to take in an emergency
COROLLA HV_U
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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

4918-2. Steps to take in an emergency
COROLLA HV_U
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When trouble arises
3 After the hybrid system has
cooled down, inspect the
hoses and radiator core (radi-
ator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately cont act your Toyota
dealer.
4 The coolant level is satisfac-
tory if it is between the
“FULL” and “LOW” lines on
the reservoir.
Reservoir
“FULL” line
“LOW” line
5 Add coolant if necessary.
Water can be used in an emer- gency if coolant is unavailable.
6
After stopping the hybrid sys-
tem and waiting for 5 minutes
or more, start the hybrid sys-
tem again and check for the
multi-information display.
If the message does not dis-
appear: Stop the hybrid sys-
tem and contact your Toyota
dealer.
If the message is not dis-
played: The hybrid system
temperature has dropped
and the vehicle may be
driven normally.
However, if the m essage appears
again frequently, contact your Toy-
ota dealer.
WA R N I N G
■When inspecting under the
hood of your vehicle
Observe the following precau-
tions. Failure to do so may result
in serious injury such as burns.
●If steam is seen coming from
under the hood, do not open the
hood until the steam has sub-
sided. The engine compart-
ment may be very hot.

4928-2. Steps to take in an emergency
COROLLA HV_U
1Stop the hybrid system. Set
the parking brake and shift
the shift lever to P.
2 Remove the mud, snow or
sand from around the front
wheels.
3 Place wood, stones or some
other material under the front
wheels to help provide trac-
tion.
4 Restart the hybrid system.
5 Shift the shift lever to D or R
and release the parking
brake. Then, while exercising
caution, depress the acceler-
ator pedal.
■When it is difficult to free the
vehicle
Press the switch to turn off
TRAC.
WA R N I N G
●After the hybrid system has
been turned off, check that the
“READY” indicator is off. When
the hybrid system is operating,
the gasoline en gine may auto-
matically start, o r the cooling
fans may suddenly operate
even if the gasoline engine
stops. Do not touch or approach
rotating parts such as the fan,
which may lead to fingers or
clothing (especially a tie, a scarf
or a muffler) getting caught,
resulting in serious injury.
●Do not loosen the coolant reser-
voir caps while the hybrid sys-
tem and radiator are hot.
High temperature steam or
coolant could spray out.
NOTICE
■When adding engine/power
control unit coolant
Add coolant slowly after the
hybrid system has cooled down
sufficiently. Adding cool coolant to
a hot hybrid system too quickly
can cause damage to the hybrid
system.
■To prevent damage to the
cooling system
Observe the following precau-
tions:
●Avoid contaminating the coolant
with foreign matter (such as
sand or dust etc.).
●Do not use any coolant additive.
If the vehicle becomes
stuck
Carry out the following pro-
cedures if the tires spin or
the vehicle becomes stuck
in mud, dirt or snow:
Recovering procedure

4989-1. Specifications
COROLLA HV_U
■Oil capacity (Drain and refill
[Reference
*])
*: The engine oil capacity is a refer-ence quantity to be used when
changing the engine oil. Warm up
the engine and turn off the hybrid
system, wait more than 5 min-
utes, and check the oil level on
the dipstick.
■Engine oil selection
“Toyota Genuine Motor Oil” is
used in your Toyota vehicle. Use
Toyota approved “Toyota Genu-
ine Motor Oil” or equivalent to
satisfy the following grade and
viscosity.
Oil grade: API SN/RC multi-
grade engine oil
Recommended viscosity: SAE
0W-16 Outside temperature
SAE 0W-16 is the best choice
for good fuel economy and good
starting in cold weather.
If SAE 0W-16 is not available,
SAE 0W-20 oil may be used.
However, it must be replaced
with SAE 0W-16 at the next oil
change.
Oil viscosity (0W-16 is explained
here as an example):
• The 0W in 0W-16 indicates the characteristic of the oil
which allows cold startability.
Oils with a lower value before
the W allow for easier starting
of the engine in cold weather.
• The 16 in 0W-16 indicates the viscosity characteristic of the
oil when the oil is at high tem-
perature. An oil with a higher
viscosity (one with a higher
value) may be better suited if
the vehicle is operated at high
speeds, or under extreme
load conditions.
Capacity6.5 Ah (3HR)
Quantity28 modules
Overall voltage201.6 V
Lubrication system
With filter4.4 qt. (4.2 L, 3.7 Imp.
qt.)
Without
filter4.1 qt. (3.9 L, 3.4 Imp.
qt.)

542Alphabetical Index
COROLLA HV_U
Dynamic radar cruise control with full-speed range ........... 192Warning message ................ 201
E
ECB (Electronically Controlled Brake System) ...................... 220
ECO Accelerator Guidance ..... 91
Eco score .................................. 91
EDR (Event data recorder)......... 8
Elapsed time ............................. 93
Electric motor (traction motor)68
Electric Power Steering (EPS) ............................................... 221Warning light ........................ 453
Electronic key ......................... 102 Battery-saving fun ction......... 112
If the electronic key does not operate properly ................. 483
Replacing the battery ........... 431
Electronically Controlled Brake System (ECB) ....................... 220
Emergency flashers ............... 442
Emergency tire puncture repair kit ........................................... 462
Emergency, in case of If a warning buzzer sounds .. 450
If a warning light turns on ..... 450
If a warning message is dis-played................................. 459
If the 12-volt battery is dis- charged .............................. 485
If the electronic key does not operate properly ................. 483
If the fuel filler door cannot be opened ............................... 483
If the hybrid sy stem will not start
........................................... 481
If the vehicle is trapped in rising water .................................. 444
If you have a fla t tire ..... 462, 473
If you lose your keys ............ 482 If you think something is wrong
...........................................448
If your vehicle becomes stuck ...........................................492
If your vehicle has to be stopped in an emergency .................443
If your vehicle needs to be towed ...........................................445
If your vehicle ove rheats ......489
Energy monitor .........................95
Enform App Suite button (Setup screen) ...................................238
Engine ACCESSORY mode . ............145
Compartment........................406
Engine switch .......................143
Hood .....................................404
How to start the hybrid system ...........................................143
Identification number ............497
If the hybrid sys tem will not start
...........................................481
If your vehicle has to be stopped in an emergency .................443
Ignition switch (power switch) ...........................................143
Overheating ..........................489
Power switch ........................143
Tachometer.............................84
Engine coolant Capacity ...............................499
Checking ..............................408
Preparing and checking before winter ..................................228
Engine coolant temperature gauge .......................................84
Engine oil Capacity ...............................498
Checking ..............................406
Preparing and checking before winter ..................................228
Warning light.........................451

5471-1. What to do if... (Troubleshooting)
COROLLA HV_U547Alphabetical Index
Phone ...................................... 317 About the contacts in the contact list ....................................... 321
Phone screen operation ....... 317
Registering/Conn ecting a Blue-
tooth
® phone ...................... 319
Some basics......................... 318
Troubleshooting.................... 341
Voice command system ....... 321
When selling or disposing of the vehicle ................................ 321
Phone button .......................... 317
Phone button (Menu screen) . 235
Phone button (Setup screen) 238
Phone settings ....................... 332 Contacts/Call history settings334
Message settings ................. 340
Notifications settings ............ 333
Sounds settings.................... 332
Placing a call u sing the Blue-
tooth
® hands-free system ... 322
By call history ....................... 322
By contacts list ..................... 323
By favorites list ..................... 322
By home screen ................... 324
By keypad ............................ 324
Power control unit .................... 71
Power control unit coolant Capacity ............................... 499
Checking .............................. 408
Preparing and c hecking before
winter.................................. 228
Power outlet ............................ 374
Power steering (Electric power steering system)................... 221Warning light ........................ 453
Power switch .......................... 143 Auto power off function ........ 146
Changing the power switch modes ................................ 145 Power switch (engine switch)
If your vehicle has to be stopped in an emergency .................443
POWER VOLUME knob ..........275
Power windows Door lock linked window opera-tion......................................128
Jam protection function ........127
Operation..............................127
Window lock switch ..............129
Pre-Collision System (PCS) Function................................174
Warning light.........................455
R
Radar cruise control (dynamic radar cruise control with
full-speed range)...................192
Radiator ...................................409
Radio........................................279 Presetting a station ...............279
Radio broadcast data system280
Rear seats ............................... 119 Head restraints .....................121
Rear side marker lights Light switch...........................158
Replacing light bulbs ....436, 437
Wattage ................................502
Rear turn signal lights Replacing light bulbs ............437
Turn signal lever ...................152
Wattage ................................502
Rear view mirror Inside rear view mirror ..........124
Outside rear view mirrors .....125
Rear view monitor system ..... 211 If you notice any symptoms ..216
Rear window defogger ...........359
Receiving a cal l using the Blue-
tooth
® hands-free system....325
Refueling Capacity ...............................497