check engine TOYOTA COROLLA 2021 (in English) Workshop Manual

5448-2. Steps to take in an emergency
COROLLA_U
■When the electronic key does
not work properly
●Make sure that the smart key sys-
tem has not been deactivated in
the customization setting. If it is
off, turn the function on. (Custom-
izable features: P.581)
●Check if battery-saving mode is
set. If it is set, cancel the function.
( P.127)
Use the mechanical key
( P.114) in order to perform the
If you lose your keys
New genuine keys can be
made by your Toyota dealer
using the other key (vehi-
cles without a smart key
system) or mechanical key
(vehicles with a smart key
system) 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
(vehicles with a smart key
system)
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 wit h your vehicle.
If the electronic key
does not operate prop-
erly (vehicles with a
smar t key system)
If communication between
the electronic key and vehi-
cle is interrupted ( P.127)
or the electronic key cannot
be used because the battery
is depleted, the smart key
system and wireless remote
control cannot be used. In
such cases, the doors can
be opened and the engine
can be started by following
the procedure below.
NOTICE
■In case of a smart key system
malfunction or other
key-related problems
Take your vehicle with all the elec-
tronic keys provided with your
vehicle to your Toyota dealer.
Locking and unlocking
the doors

5458-2. Steps to take in an emergency
8
When trouble arises
COROLLA_U
following operations:
1Locks all the doors
2 Unlocks all the doors
Turning the key unlocks the driver’s
door. Turning the key again unlocks
the other doors.
■Key linked functions
1 Closes the windows and moon
roof
*1 (turn and hold)*2
2Opens the windows and moon
roof
*1 (turn and hold)*2
*1
: If equipped
*2:This setting mu st be customized
at your Toyota dealer.
1 Vehicles with a continuously
variable transmission:
Ensure that the shift lever is
in P and depress the brake
pedal.
Vehicles with a manual trans-
mission: Shift the shift lever
to N and depress the clutch
pedal.
2 Touch the Toyota emblem
side of the electronic key to
the engine switch.
When the electronic key is
detected, a buzzer sounds and the
engine switch will turn to ON.
When the smart key system is
deactivated in customization set-
ting, the engine s witch will turn to
WA R N I N G
■When using the mechanical
key and operating the power
windows or moon roof (if
equipped)
Operate the power window or
moon roof after checking to make
sure that there is no possibility of
any passenger having any of their
body parts caught in the window
or moon roof.
Also, do not allo w children to
operate the mechanical key. It is
possible for children and other
passengers to get caught in the
power window or moon roof.
Starting the engine

5468-2. Steps to take in an emergency
COROLLA_UACC.
3
Firmly depress the brake
pedal (continuously variable
transmission) or clutch pedal
(manual transmission) and
check that is shown on
the multi-information display.
4 Press the engine switch
shortly and firmly.
In the event that the engine still
cannot be started, contact your
Toyota dealer.
■Stopping the engine
Shift the shift lever to P (continu-
ously variable transmission) or N
(manual transmission) and press
the engine switch as you normally
do when stopping the engine.
■Electronic key battery
As the above proc edure is a tempo-
rary measure, it is recommended
that the electronic key battery be
replaced immediate ly when the bat-
tery is depleted. ( P.489)
■Changing engine switch modes
Release the brake pedal (continu-
ously variable transmission) or
clutch pedal (manual transmission)
and press the engine switch in step
3 above.
The engine does not start and
modes will be cha nged each time
the switch is pressed. ( P.167)
If the vehicle batter y
is discharged
The following procedures
may be used to start the
engine if the vehicle’s bat-
tery is discharged.
You can also call your Toy-
ota dealer or a qualified
repair shop.

5528-2. Steps to take in an emergency
COROLLA_U
check that the radiator cool-
ing fan operates and to check
for coolant leaks from the
radiator or hoses.
The fan operates when the air con-
ditioning system is turned on imme-
diately after a cold start. Confirm
that the fan is operating by check-
ing the fan sound and air flow. If it is
difficult to check th ese, turn the air
conditioning system on and off
repeatedly. (The fan may not oper-
ate in freezing temperatures.)
7 If the fan is not operating:
Stop the engine immediately
and contact your Toyota
dealer.
If the fan is operating: Have
the vehicle inspected at the
nearest Toyota 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.
●Keep hands and clothing (espe-
cially a tie, a scarf or a muffler)
away from the fan and belts.
Failure to do so m ay cause the
hands or clothing to be caught,
resulting in serious injury.
●Do not loosen the coolant reser-
voir cap while the engine and
radiator are hot.
High temperature steam or
coolant could spray out.
NOTICE
■When adding engine coolant
Add coolant slowly after the
engine has cooled down suffi-
ciently. Adding cool coolant to a
hot engine too quickly can cause
damage to the engine.
■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.

5589-1. Specifications
COROLLA_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
and turn off the engine, wait more
than 5 minutes, 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-5 multi-
grade engine oil
Recommended viscosity: SAE
0W-20
Engine
Model1.8 L 4-cylinder (2ZR-FAE)2.0 L 4-cylinder
(M20A-FKS)
Ty p e4-cylinder in line, 4-cycle,
gasoline4-cylinder in line, 4-cycle,
gasoline
Bore and stroke3.17  3.48 in. (80.5  88.3
mm)3.17  3.84 in. (80.5  97.6
mm)
Displacement109.7 cu. in. (1798 cm3)121.3 cu. in. (1987 cm3)
Valve clearanceAutomatic adjustment
Drive belt tensionAutomatic adjustment
Fuel
Fuel typeUnleaded gasoline only
Octane Rating87 (Research Octane Number 91) or
higher
Fuel tank capacity
(Reference)13.2 gal. (50.0 L, 11.0 Imp. gal.)
Lubrication system (1.8 L
4-cylinder [2ZR-FAE]
engine)
With filter4.4 qt. (4.2 L, 3.7 Imp.
qt.)
Without
filter4.1 qt. (3.9 L, 3.4 Imp.
qt.)

5599-1. Specifications
9
Vehicle specifications
COROLLA_U
Outside temperature
SAE 0W-20 is the best choice
for good fuel economy and good
starting in cold weather.
If SAE 0W-20 is not available,
SAE 5W-20 oil may be used.
However, it must be replaced
with SAE 0W-20 at the next oil
change.
Oil viscosity (0W-20 is explained
here as an example):
• The 0W in 0W-20 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 20 in 0W-20 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.
How to read oil container label:
The International Lubricant
Specification Advisory Commit-
tee (ILSAC) Certification Mark is added to some oil containers to
help you select the oil you
should use.
■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
and turn off the engine, wait more
than 5 minutes, an d 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
Lubrication system (2.0 L
4-cylinder [M20A-FKS]
engine)
With filter4.9 qt. (4.6 L, 4.0 Imp.
qt.)
Without filter4.5 qt. (4.3 L, 3.8 Imp.
qt.)

5619-1. Specifications
9
Vehicle specifications
COROLLA_U
*: To determine if your vehicle's engine coolant reservoir is type A or type B,
refer to "Checking the engine coolant". ( P.470)
Cooling system
Capacity (Reference)
1.8 L 4-cylinder (2ZR-FAE) engine
Continuously variable transmission:
6.1 qt. (5.8 L, 5.1 Imp. qt.)
Manual transmission:
5.9 qt. (5.6 L, 4.9 Imp. qt.)
2.0 L 4-cylinder (M20A-FKS) engine (vehicles
with a type A engine coolant reservoir)
*
Continuously variable transmission:
6.6 qt. (6.2 L, 5.5 Imp. qt.)
Manual transmission:
6.2 qt. (5.9 L, 5.2 Imp. qt.)
2.0 L 4-cylinder (M20A-FKS) engine (vehicles
with a type B engine coolant reservoir)
*
Continuously variable transmission:
6.8 qt. (6.4 L, 5.6 Imp. qt.)
Manual transmission:
6.4 qt. (6.1 L, 5.4 Imp. qt.)
Coolant type
Use either o f the following:
 “Toyota Super Long Life Coolant”
 Similar high-quality et hylene glycol-based
non-silicate, non -amine, non-nitrite, and
non-borate coolant with long-life hybrid organic
acid technology
Do not use pla in water alone.
Ignition system (spark plug)
Make
1.8 L 4-cylinder (2ZR-FAE) engine
DENSO FC16HR-Q8
2.0 L 4-cylinder (M20A-FKS) engine
DENSO FC20HR-Q8
Gap0.032 in. (0.8 mm)

604What to do if... (Troubleshooting)
COROLLA_U
1-1.What to do if... (Troubleshooting)What to do if... (Troubleshooting)
If you lose your keys or
mechanical keys, new genu-
ine keys or mechanical keys
can be made by your Toyota
dealer. ( P.544)
 If you lose your keys or elec-
tronic keys, the risk of vehicle
theft increases significantly.
Contact your Toyota dealer
immediately. ( P.544)
 Is the key battery weak or
depleted? ( P.489)
 Vehicles with a smart key sys-
tem: Is the engine switch in
ON?
When locking the doors, turn the
engine switch off. ( P.166)
 Vehicles with a smart key sys-
tem: Is the electronic key left
inside the vehicle?
When locking the doors, make sure
that you have the electronic key on
your person.
 The function may not operate
properly due to the condition
of the radio wave. ( P. 1 1 3 ,
127)
 Is the child-protector lock set?
The rear door cannot be opened
from inside the vehicle when the
lock is set. Open the rear door from
outside and then unlock the
child-protector lock. ( P.121)
 Continuously variable trans-
mission: Is the shift lever in
P? ( P.163)
 Manual transmission: Do you
turn the key with the clutch
pedal depressed firmly?
( P.163)
 Is the steering wheel
unlocked? ( P.163)
 Is the battery discharged?
( P.546)
If you have a problem,
check the following before
contacting your Toyota
dealer.
The doors cannot be
locked, unlocked, opened
or closed
You lose your keys
The doors cannot be
locked or unlocked
The rear door cannot be
opened
If you think something is
wrong
The engine does not start
(vehicles without a smart
key system)

606What to do if... (Troubleshooting)
COROLLA_U
The seat belt reminder light is
flashing
Are the driver and the passenger
wearing the seat belts? ( P.514)
 The parking brake indicator is
on
Is the parking brake released?
( P.180
, 181)
Depending on the situation,
other types of warning buzzer
may also sound. ( P.511, 521)
 Did anyone inside the vehicle
open a door during setting the
alarm?
The sensor detects it and the alarm
sounds. ( P. 8 2 )
Do one of the following to deac-
tivate or stop the alarms:
 Unlock the doors.
 Turn the engine switch to
ACC or ON, or start the
engine. (The alarm will be
deactivated or stopped after a
few seconds.)
 Is the electronic key left inside
the vehicle?
Check the message on the
multi-information display. ( P.521)
 When a warning light turns on
or a warning message is dis-
played, refer to P.511, 521.
 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.523)
 Vehicles with a spare tire:
Stop the vehicle in a safe
place and replace the flat tire
with the spare tire. ( P.534)
 Try the procedure for when
the vehicle becomes stuck in
mud, dirt, or snow. ( P.553)
An alarm is activated and
the horn sounds (vehicles
with an alarm)
A warning buzzer sounds
when leaving the vehicle
( v e h i c l e s w i t h a s m a r t k e y
system)
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

610Alphabetical Index
COROLLA_UDoor lock .............................. 117
Open door warning buzzer . 119,
121
Outside rear view mirrors ..... 140
Rear door child-protectors.... 121
Side doors ............................ 117
Drive distance ......................... 104
Drive information ................... 104
Drive-start control .................. 152
Driving Break-in tips ......................... 152
Correct driving posture ........... 25
Driving mode select switch... 271
Procedures ........................... 150
Winter drive tips ................... 277
Driving information display ... 101
Driving range .......................... 102
Driving support system informa- tion display ........................... 103
Dynamic radar cruise control 240 Warning message ................ 248
Dynamic radar cruise control with full-speed range ........... 229Warning message ................ 238
E
Eco Driving Indicator ............. 102
Eco Driving Indicator Light ... 102
EDR (Event data recorder)......... 9
Elapsed time ........................... 104
Electric Power Steering (EPS) ............................................... 272Warning light ........................ 514
Electronic key ......................... 110 Battery-saving function......... 126
If the electronic key does not operate properly ................. 544
Replacing the battery ........... 489
Emergency flashers ............... 502
Emergency tire puncture repair kit ........................................... 523 Emergency, in case of
If a warning buzzer sounds .. 511
If a warning light turns on ..... 511
If a warning message is dis-played .................................521
If the battery is d ischarged ...546
If the electronic key does not operate properly .................544
If the engine will not start......542
If the vehicle is trapped in rising water...................................504
If you have a flat tire .....523, 534
If you lose your keys.............544
If you think something is wrong ...........................................509
If your vehicle becomes stuck ...........................................553
If your vehicle has to be stopped in an emergency .................502
If your vehicle needs to be towed ...........................................505
If your vehicle ove rheats ......550
Engine ACCESSORY mode . ............167
Compartment........................466
Engine switch ...............163, 164
Fuel pump shut off system ...510
Hood .....................................464
How to start the engine 163, 164
Identification number ............557
If the engine will not start......542
If your vehicle has to be stopped in an emergency .................502
Ignition switch (engine switch) ...................................163, 164
Overheating ..........................550
Tachometer.......................91, 95
Engine coolant Capacity ...............................561
Checking ..............................470
Preparing and checking before winter ..................................277