stop start TOYOTA COROLLA HYBRID 2021 (in English) Service Manual

4888-2. 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. 5 1 7
■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 a message that indicates the
malfunction of front camera is
displayed
The following systems may be sus-
pended until the problem shown in
the message is resolved. (P.187,
478)
●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

5138-2. Steps to take in an emergency
COROLLA HV_U
8
When trouble arises
shown on the multi-informa-
tion display.
4 Press the power switch
shortly and firmly.
In the event that the hybrid sys-
tem still cannot be started, con-
tact your Toyota dealer.
■Stopping the hybrid system
Shift the shift lever to P and press
the power switch as you normally do
when stopping the hybrid system.
■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.459)
■Changing power switch modes
Release the brake pedal and press
the power switch in step 3 above.
The hybrid system does not start
and modes will be changed each
time the switch is pressed. ( P.160)
If the 12-volt batter y is
discharged
The following procedures
may be used to start the
hybrid system if the 12-volt
battery is discharged.
You can also call your Toy-
ota dealer or a qualified
repair shop.

5188-2. Steps to take in an emergency
COROLLA HV_U
sides.
If you do not see steam:
Carefully lift the hood.
3 After the hybrid system has
cooled down sufficiently,
inspect the hoses and radia-
tor core (radiator) 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 “MAX”
and “MIN” lines on the reser-
voir.
Reservoir
“MAX” line
“MIN” line
5 Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
6Start the hybrid system and
turn the air conditioning sys-
tem on to check that the radi-
ator cooling fans operate and
to check for coolant leaks
from the radiator or hoses.
The fans operate when the air con-
ditioning system is turned on imme-
diately after a cold start. Confirm
that the fans are operating by
c h e c k i n g t h e f a n s o u n d a n d a i r f l o w.
If it is difficult to check these, turn
the air conditioni ng system on and
off repeatedly. (The fans may not
operate in freezing temperatures.)
7 If the fans are not operating:
Stop the hybrid system
immediately and contact your
Toyota dealer.
If the fans are operating:
Have the vehicle inspected at
the nearest Toyota dealer.
If “Hybrid System Over-
heated Output Power
Reduced” is shown on the
multi-information display
1 Stop the vehicle in a safe
place.
2 Stop the hybrid system and
carefully lift the hood.

5198-2. Steps to take in an emergency
COROLLA HV_U
8
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.

5208-2. 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

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

570Alphabetical Index
COROLLA HV_U
Dynamic radar cruise control with full-speed range ........... 207Warning message ................ 216
E
ECB (Electronically Controlled Brake System) ...................... 240
ECO Accelerator Guidance ... 105
Eco score ................................ 105
EDR (Event data recorder)......... 8
Elapsed time ........................... 107
Electric motor (traction motor)80
Electric Power Steering (EPS) ............................................... 240Warning light ........................ 481
Electronic key ......................... 116 Battery-saving function......... 126
If the electronic key does not operate properly ................. 511
Replacing the battery ........... 459
Electronically Controlled Brake System (ECB) ....................... 240
Emergency flashers ............... 470
Emergency tire puncture repair kit ........................................... 490
Emergency, in case of If a warning buzzer sounds .. 478
If a warning light turns on ..... 478
If a warning message is dis-played................................. 487
If the 12-volt battery is dis- charged .............................. 513
If the electronic key does not operate properly ................. 511
If the fuel filler door cannot be opened ............................... 511
If the hybrid sy stem will not start
........................................... 509
If the vehicle is trapped in rising water .................................. 472
If you have a fla t tire ..... 490, 501
If you lose your keys ............ 510 If you think something is wrong
...........................................476
If your vehicle becomes stuck ...........................................520
If your vehicle has to be stopped in an emergency .................471
If your vehicle needs to be towed ...........................................473
If your vehicle ove rheats ......517
Energy monitor .......................109
Engine ACCESSORY mode . ............160
Compartment........................434
Engine switch .......................157
Hood .....................................432
How to start the hybrid system ...........................................157
Identification number ............525
If the hybrid sys tem will not start
...........................................509
If your vehicle has to be stopped in an emergency .................471
Ignition switch (power switch) ...........................................157
Overheating ..........................517
Power switch ........................157
Tachometer.............................98
Engine coolant Capacity ...............................527
Checking ..............................436
Preparing and checking before winter ..................................247
Engine coolant temperature gauge .......................................98
Engine oil Capacity ...............................526
Checking ..............................434
Preparing and checking before winter ..................................247
Warning light.........................479

572Alphabetical Index
COROLLA HV_U
Headlights/daytime running lightsReplacing light bulbs ............ 464
Heated steering wheel ........... 393
Heaters Automatic air conditioning sys-tem ..................................... 386
Heated steering wheel ......... 393
Outside rear view mirrors ..... 387
Seat heaters ......................... 393
High mounted stoplight Replacing light bulbs ............ 464
High-voltage components ....... 83
Hill-start assist control .......... 240
HOME button .......................... 262
Home screen ........................... 262
Hood Open .................................... 432
Hooks Coat hooks ........................... 410
Retaining hooks (floor mat) .... 24
Horn ......................................... 138
Hybrid battery (tr action battery)
Location.................................. 83
Specification ......................... 526
Warning message .................. 87
Hybrid battery (traction battery) air intake vent ....................... 455
Hybrid battery (traction battery) air vents .................................. 86
Hybrid system .......................... 80 Emergency shut off system .... 87
Energy monitor/consumption screen ................................ 109
EV drive mode...................... 162
High voltage components....... 83
Hybrid system precautions ..... 83
If the hybrid sy stem will not start
........................................... 509
Overheating.......................... 518
Power (ignition) switch ......... 157
Regenerative braking ............. 81 Starting the hybrid system ....157
Hybrid System Indicator ........105
Hybrid transmissio n ...............164
Hybrid vehicle dri ving tips.....245
I
I/M test .....................................429
Identification
Engine ..................................525
Vehicle ..................................524
Ignition switch (power switch) ...............................................157Auto power off fun ction .........160
Changing the power switch modes.................................160
If your vehicle has to be stopped in an emergency .................471
Illuminated entry system .......396
Immobilizer system ..................88
Indicators ..................................96
Info button (Menu screen) .....255
Initial screen............................259 Caution screen .....................259
Restarting the system ...........259
Initialization Items to initialize ...................552
Maintenance .........................426
Power windows ....................142
Tire pressure w arning system
...........................................447
Inside rear view m irror ...........139
Instrument panel light control ...............................................101
Interior lights...........................395 Front interior light .................395
Rear interior light ..................395
Wattage ................................530
Internet radio...........................308
iPod/iPhone(Apple Carplay) .. 311

577Alphabetical Index
COROLLA HV_U
Setup screen ........................... 258
Shift lever Hybrid transmission.............. 164
If the shift lever cannot be shifted from P................................. 165
Shift lock system .................... 165
Side airbags .............................. 31
Side marker lights Light switch .......................... 173
Replacing light bulbs .... 464, 465
Wattage ................................ 530
Side mirrors Adjustment ........................... 140
BSM (Blind Spot Monitor)..... 221
Folding ................................. 141
RCTA function ...................... 226
Side turn signal lights Replacing light bulbs ............ 464
Turn signal lever ................... 166
Side windows ...... ................... 142
SiriusXM (SXM) ....................... 303
Smart key system Antenna location .................. 125
Entry functions ..................... 119
Starting the hybrid system.... 157
Snow tires ............................... 247
Spare tire ................................. 501 Inflation pressure.................. 529
Storage location ................... 502
Spark plug ............................... 527
Specifications ......................... 524
Speedometer ............................ 98
Status icon .............................. 256 Status icon explanation ........ 256
Steering lock Column lock release............. 158
Steering lock system warning message............................. 158
Steering switch ............... 319, 334 Audio switch ......................... 319
Talk switch ............................ 334 Steering wheel
Adjustment ...........................138
Heated steering wheel..........393
Meter control switches..........103
Stop lights Replacing light bulbs ............464
Storage features ... ..................397
Stuck If the vehicle becomes stuck 520
Sun visors ...............................409
Switches Automatic High Beam system...........................................175
Brake Hold switch .................170
Display change button ..........100
Door lock switches ...............121
Driving mode select switch ...239
Dynamic radar cruise control with full-speed range switch207
Emergency flashers switch...470
EV drive mode switch ...........162
Garage door opener switches ........................................... 411
Heated steering wheel switch ...........................................393
Ignition switch .......................157
Instrument panel light control switches..............................101
Light switches .......................173
LTA (Lane Tracing Assist) switch ...........................................202
Meter control switches..........103
Outside rear v iew mirror
switches..............................140
Parking brake switch ............167
Power door lock switch.........121
Power switch ........................157
Power window switches .......142
Rear window and outside rear view mirror defoggers switch...........................................386
Seat heater switches ............393