check engine TOYOTA COROLLA HYBRID 2023 Owner's Manual

3546-3. Do-it-yourself maintenance
1Turn 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

3827-2. Steps to take in an emergency
■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
WARNING
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
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.372)

3837-2. Steps to take in an emergency
7
When trouble arises
the 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 1 4
■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
●AHB (Automatic High Beam)
■If “System Malfunction Visi-
tYour Dealer” is displayed
Indicates one of the following sys-
tems is disabled.
●PCS (Pre-Collision system)
●LDA (Lane Departure Alert)
●LTA (Lane Tracing Assist)
●AHB (Automatic High Beam)
●Dynamic radar cruise control
●RSA (Road Sign Assist) (if
equipped)
●BSM (Blind Spot Monitor) (if
equipped)

3867-2. Steps to take in an emergency
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.309)
*: Refer to the separate “Scheduled
Maintenance” or “Owner’s Man-
ual Supplement” for the mainte-
nance interval applicable to your
vehicle.
■If “Engine Maintenance
Required Visit Your Dealer” is
shown
The engine or an engine component
is malfunctioning. Have the vehicle
inspected by your Toyota dealer
immediately.
■If a message that indicates the
need for visiting your Toyota
dealer is displayed
The system or part shown on the
multi-information display 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 the instructions
accordingly. ( P.414)
●If any of the following messages
are displayed on the multi-infor-
mation display, it may indicate a
malfunction. Have the vehicle
inspected by you r 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. 8 2 )
• “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
vent may be blocked, or there may
be a gap in the duct. Therefore,
perform the follo wing correction
procedure.
• Cleaning the hybrid battery (trac-
tion battery) air intake vents.
( P.347)
If the warning message is shown
even if the vents are cleaned,
have the vehicle inspected by
your Toyota dealer.
NOTICE
■If “High Power Consumption
Power to Climate Temporar-
ily Limited” is displayed fre-
quently
There is a possible malfunction
relating to the charging system or
the 12-volt battery may be deteri-
orating. Have the vehicle
inspected by you r Toyota dealer.

4047-2. Steps to take in an emergency
USE ONLY” on the tire sidewall.
Use the compact spare tire tempo-
rarily, and only in an emergency.
●Make sure to check the tire infla-
tion pressure of the compact
spare tire. (P.426)
■When the compact spare tire is
equipped
The vehicle becomes lower when
driving with the compact spare tire
compared to when driving with stan-
dard tires.
■After completing the tire
change
The tire pressure warning system
must be reset. ( P.333)
■When using the compact spare
tire
As the compact sp are tire is not
equipped with a tire pressure warn-
ing valve and transmitter, low infla-
tion pressure of the spar e tire will
not be indicated by the tire pressure
warning system. Also, if you replace
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 reinstallin g the wheel cap
(steel wheels except compact
spare tire)
Align the cutout of the wheel cap
with the valve stem as shown in the
illustration.
WARNING
■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 comp act 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
• EPS
• PCS (Pre-Collision System)
• LDA (Lane Departure Alert)

4167-2. Steps to take in an emergency
Toyota dealer as soon as possible.
6After 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 message appears
again frequently, contact your Toy-
ota dealer.
WARNING
■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.
●After the hybrid system has
been turned off , check that the
“READY” indicator is off. When
the hybrid system is operating,
the gasoline engine may auto-
matically start, or 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.

4228-1. Specifications
Front (2WD models)
Rear (AWD models)
■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: ILSAC GF-6B multi-
grade engine oil
Recommended viscosity: SAE
0W-16
Electric motor (traction motor)
Ty p ePermanent magnet synchronous
motor
Maximum output70 kW
Maximum torque136.4 ft•lbf (185 N•m, 168.9 kgf•m)
Ty p ePermanent magnet synchronous
motor
Maximum output30 kW
Maximum torque62 ft•lbf (84 N•m, 8.6 kgf•m)
Hybrid battery (traction battery)
Ty p eLithium-ion battery
Vo l t a g e3.7 V/cell
Capacity4.08 Ah
Quantity56 cells
Nominal voltage207.2 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.)

470Alphabetical Index
How to start the hybrid system................................... 170, 172
Identification number ............ 421
If the hybrid sy stem will not start
........................................... 406
If your vehicle has to be stopped in an emergency................. 363
Ignition switch (power switch) ................................... 170, 172
Overheating.......................... 414
Power switch ................ 170, 172
Tachometer ............................ 96
Engine coolant Capacity ............................... 423
Checking .............................. 320
Preparing and c hecking before
winter.................................. 273
Engine coolant temperature gauge................................. 96, 99
Engine oil Capacity ............................... 422
Checking .............................. 318
Preparing and c hecking before
winter.................................. 273
Warning light ........................ 373
Engine switch (power switch) ....................................... 170, 172If your vehicle has to be stopped in an emergency................. 363
Enhanced VSC ........................ 266
EPS (Electric Power Steering) ............................................... 266Warning light ........................ 375
EV drive mode ........................ 178
EV Driving Ratio ............. 106, 112
EV indicator .............................. 78
EV Ratio .......................... 106, 112
Event data recorder (EDR)......... 8F
Flat tire Tire pressure w arning system
...........................................328
Vehicles with a spare tire......398
Vehicles with an emergency tire puncture repair ki t...............387
Floor mats .................................24
Fluid Brake ....................................425
Hybrid transmission ..............424
Washer .................................324
Front passenger occupant clas- sification system ....................41
Front seats Adjustment ...........................141
Cleaning ...............................305
Correct driving posture ...........25
Head restraints .....................144
Seat heaters ....... ..................284
Front side marker lights Light switch...........................189
Wattage ................................428
Front turn signal lights Replacing light bulbs ............357
Turn signal lever ...................182
Fuel Capacity ...............................421
Fuel gauge .......................96, 99
Information ......... ..................429
Refueling ..............................196
Type......................................421
Warning light.........................375
Fuel consumption Average fuel economy .. 104, 110
Current fuel consumption ...104, 11 0
Fuel economy ................. 104, 110
Fuel filler door Refueling ..............................196
Fuel gauge...........................96, 99

474Alphabetical Index
P
Panic mode ............................. 124
Parking brakeOperation ............................. 183
Parking brake engaged warning buzzer ................................ 185
Warning light ........................ 379
Warning message ................ 185
Parking lights Light switch .......................... 189
Replacing light bulbs ............ 357
PCS (Pre-Collision System)... 207 Function ............................... 208
Warning light ........................ 377
PDA (Proactive driving assist) [PDA (Proactive driving assist)]............................................... 228
Personal lights ....................... 286 Wattage ................................ 428
Power control unit .................... 82
Power control unit coolant Capacity ............................... 423
Checking .............................. 320
Preparing and c hecking before
winter.................................. 273
Power outlet ............................ 292
Power steering (Electric power steering system)................... 266Warning light ........................ 375
Power switch .................. 170, 172 Auto power off function ........ 176
Changing the power switch modes ................................ 176
Power switch ( engine switch)
If your vehicle has to be stopped in an emergency................. 363
Power windows Door lock linked window opera-tion ..................................... 151
Jam protection function ........ 150
Operation ............................. 150 Window lock switch ..............152
Pre-Collision System (PCS) ...207 Function................................208
Warning light.........................377
Predictive efficient drive .........80
R
Radiator ...................................321
RCTA Function................................254
RCTA function .........................255
Rear Cross Traffic Alert (RCTA) ...............................................254
Rear seats ...............................142 Head restraints .....................144
Rear side marker lights Light switch...........................189
Replacing light bulbs ............357
Wattage ................................428
Rear turn signal lights Replacing light bulbs ....357, 358
Turn signal lever ...................182
Wattage ................................428
Rear view mirror Inside rear view mirror ..........147
Outside rear view mirrors .....148
Rear window defogger ...........280
Refueling Capacity ...............................421
Fuel types .............................421
Opening the fuel tank cap ....196
Regenerative braking ...............78
Replacing Electronic key battery ...........350
Fuses....................................354
Light bulbs ............................356
Tires......................................398
Wireless remote control battery...........................................350
Reporting safety defects for Canadian owners ..................454

478Alphabetical Index
Brake hold ............................ 379
Brake Override System ........ 374
Brake system ....................... 372
Charging system .................. 373
Drive-Start Control ............... 374
Electric power steering ......... 375
Engine .................................. 373
High coolant temperature ..... 372
Hybrid system ...................... 373
Hybrid system overheat ....... 373
Key reminder ........................ 171
LDA (Lane Departure Alert) 223, 377
Low engine oil pressure ....... 373
LTA (Lane Tracing Assist) ... 218, 377
Open door ......... ........... 129, 131
PDA (Proactive Driving Assist) ........................................... 377
Seat belt ....................... 375, 376
Warning label ............................ 82
Warning lights ........................ 372 ABS ...................................... 374
Brake hold operated indicator........................................... 379
Brake Override System ........ 374
Brake system ....................... 372
Charging system .................. 373
Cruise control indicator ........ 378
Drive-Start Control ............... 374
Driving assist information indica- tor ....................................... 378
Dynamic radar cruise control indicator.............................. 377
Electric power steering ......... 375
High coolant temperature ..... 372
Hybrid system overheat ....... 373
LDA indicator ........................ 377
Low engine oil pressure ....... 373
Low fuel level ....................... 375
LTA indicator ......................... 377
Malfunction indicator lamp ... 373 Parking brake indicator.........379
PDA indicator........................377
Pre-collision syst
em .............377
Seat belt reminder light 375, 376
Slip indicator .........................378
SRS ......................................374
Tire pressure ...... ..................376
Warning messages .................382
Washer Checking ..............................324
Preparing and checking before winter ..................................273
Switch ...................................194
Washing and waxing ..............302
Weight Cargo capacity .....................168
Load limits ............................168
Wheels .....................................344 Replacing .............................344
Size ......................................426
Window lock switch ...............152
Windows Power windows ....................150
Rear window defogger .........280
Washer .................................194
Windshield wiper de-icer .......282
Windshield wipers ..................194
Winter driving tips ..................273
Wireless charger.....................292
Wireless remote control Battery-Saving Function .......137
Locking/Unlocking ................124
Replacing the battery ...........350