2023 TOYOTA COROLLA CROSS HYBRID coolant temperature

4017-2. Steps to take in an emergency
7
When trouble arises
Fluid leaks under the vehicle.
(Water dripping from the air
conditioning after use is nor-
mal.)
 Flat-looking tires or uneven
tire wear
 Engine coolant temperature
gauge needle continually
points higher than normal.
 Changes in exhaust sound
 Excessive tire squeal when
cornering
 Strange noises related to the
suspension system
 Pinging or other noises
related to the hybrid system
 Engine missing, stumbling or
running roughly
 Appreciable loss of power
 Vehicle pulls heavily to one side when braking
 Vehicle pulls heavily to one
side when driving on a level
road
 Loss of brake effectiveness,
spongy feeling, pedal almost
touches the floor
If you think something
is wrong
If you notice any of the fol-
lowing symptoms, your
vehicle probably needs
adjustment or repair. Con-
tact your Toyota dealer as
soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

4027-2. Steps to take in an emergency
■Brake system warning light (warning buzzer)
■Brake system warning light
■High coolant temperature warning light* (warning buzzer)
*: This light illuminat es on the multi-information display.
If a war ning light tur ns on or a war ning buzzer
sounds
Calmly perform the following actions if any of the warning
lights comes on or flashes. If a light comes on or flashes, but
then goes off, this does not necessarily indicate a malfunction
in the system. However, if this continues to occur, have the
vehicle inspected by your Toyota dealer.
Actions to the warning lights or warning buzzers
Warning lightDetails/Actions
(U.S.A.)
or
(Red)
(Canada)
Indicates that:
 The brake fluid level is low; or
 The brake system is malfunctioning
 Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer. Continuing to drive the vehi-
cle may be dangerous.
Warning lightDetails/Actions
(Yellow)
Indicates a malfunction in:
The regenerative braking system;
 The electronically contr olled brake system; or
 The parking brake system
 Have the vehicle inspected by your Toyota dealer
immediately.
Warning lightDetails/Actions
Indicates that the engine c oolant temperature is exces-
sively high
 Immediately stop the vehicle in a safe place.
Handling method ( P.438)

4397-2. Steps to take in an emergency
7
When trouble arises
Water can be used in an emer-
gency if coolant is unavailable.
If water was added in an emer-
gency, have the vehicle inspected
at your Toyota dealer as soon as
possible.
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 w hen the air con-
ditioning system is turned on imme-
diately after a cold start. Confirm
that the fans are operating by
checking the fan sound and air flow.
If it is difficult to check these, turn
the air conditioning 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 overheated
Output power reduced” is
shown on the multi-informa-
tion display
1 Stop the vehicle in a safe
place. 2
Stop the hybrid system and
carefully lift the hood.
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 contact your Toyota
dealer.
4The coolant level is satisfac-
tory if it is between the “F”
and “L” lines on the reservoir.
Reservoir
“F” line
“L” line
5 Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
If water was added in an emer-

4407-2. Steps to take in an emergency
gency, have the vehicle inspected
at your 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.

492Alphabetical Index
If you have a flat tire ............. 417
If you lose your keys ............ 429
If you think something is wrong........................................... 401
If your vehicle becomes stuck ........................................... 441
If your vehicle has to be stopped in an emergency................. 395
If your vehicle needs to be towed ........................................... 397
If your vehicle overheats ...... 438
Energy monitor ....................... 105
Engine ACCESSORY mode ............. 177
Compartment ....................... 350
Engine switch ....................... 174
Hood..................................... 348
How to start the hybrid system........................................... 174
Identification number ............ 445
If the hybrid sy stem will not start
........................................... 428
If your vehicle has to be stopped in an emergency................. 395
Ignition switch (power switch) ........................................... 174
Overheating.......................... 438
Power switch ........................ 174
Tachometer ...................... 84, 87
Engine coolant Capacity ............................... 447
Checking .............................. 352
Engine coolant temperature gauge................................. 84, 87
Engine oil Capacity ............................... 446
Checking .............................. 350
Preparing and c hecking before
winter.................................. 291
Warning light ........................ 403
Engine switch (power switch)174
Enhanced VSC ........................ 285 EPS (Electric Po
wer Steering)
...............................................285 Warning light.........................405
EV drive mode.........................179
EV Driving Ratio ...............94, 101
EV indicator...............................69
EV Ratio .............................94, 101
Event data recorder (EDR) .........8
F
Flat tire Tire pressure w arning system
...........................................360
Vehicles with an emergency tire puncture repair ki t...............417
Floor mats .................................22
Fluid Brake ....................................449
Hybrid transmission ..............448
Washer .................................355
Fog lights ................................198 Replacing light bulbs ............388
Switch ...................................198
Front passenger occupant clas- sification system ....................37
Front seats Adjustment ...........................134
Cleaning ...............................337
Correct driving posture ...........23
Head restraints .....................137
Seat heaters ....... ..................306
Front side marker lights Light switch...........................192
Replacing light bulbs ....387, 388
Wattage ................................450
Front turn signal lights Replacing light bulbs ....387, 388
Turn signal lever ...................185
Wattage ................................450
Fuel Capacity ...............................445
Fuel gauge .......................84, 87

496Alphabetical Index
O
Odometer ............................ 85, 89
Odometer and trip meter displayDisplay change button...... 85, 89
Display items .................... 86, 89
Oil Engine oil ............................. 446
Rear differential oil ............... 448
Open tray ................................ 312
Opener Back door ..................... 122, 123
Fuel filler door ...................... 202
Hood..................................... 348
Outside rear view mirrors Adjustment ........................... 142
BSM (Blind Spot Monitor)..... 252
Folding ................................. 142
Outside rear view mirror defog-gers .................................... 301
RCTA function ...................... 257
Safe Exit Assist .................... 263
Outside temperature .......... 84, 87
Overheating ............................ 438
P
Paddle shift switches ............. 183
Panic mode ............................. 114
Parking assist sensors (intuitive parking assist) ...................... 268
Parking brake Operation ............................. 186
Parking brake engaged warning buzzer ................................ 188
Warning light ........................ 408
Warning message ................ 188
Parking lights Light switch .......................... 192
Replacing light bulbs ............ 387
Wattage ................................ 450 Parking Support Brake function
(for rear-crossing vehicles) .281Function................................281
Parking Support Brake function (static objects) ......................279Function................................279
PCS (Pre-Collision System) Function................................213
Warning light.........................407
Personal lights ........................308
PKSB (Parking Support Brake) ...............................................274
Power control unit ....................71
Power control unit coolant Checking ..............................352
Preparing and checking before winter ..................................291
Power outlet ............................316
Power steering (Electric power steering system) ...................285Warning light.........................405
Power switch...........................174 Changing the power switch modes.................................177
Power windows Door lock linked window opera-tion......................................144
Jam protection function ........143
Operation..............................143
Window lock switch ..............145
Pre-Collision System (PCS) Function................................213
Warning light.........................407
R
Radiator ...................................353
RCTAFunction................................257
RCTA function .........................258
Rear Cross Traffic Alert (RCTA) ...............................................257

500Alphabetical Index
V
Vanity lights ............................ 324
Vanity mirrors ......................... 324
Vehicle data recording ............... 6
Vehicle identification number444
Vehicle information display ... 95, 102
Vehicle Stability Control (VSC) ............................................... 284
VSC (Vehicle Stability Control) ............................................... 284
W
Warning buzzers ABS ...................................... 404
Airbags ................................. 404
Approach warning ................ 241
Brake hold ............................ 409
Brake Override System ........ 404
Brake system ....................... 402
Charging system .................. 403
Downshifting......................... 184
Drive-Start Control ............... 404
Electric power steering ......... 405
Engine .................................. 403
High coolant temperature ..... 402
Hybrid system overheat ....... 403
Intuitive parking assist OFF indi-cator ................................... 407
LDA (Lane Departure Alert) 228, 407
Low engine oil pressure ....... 403
LTA (Lane Tracing Assist) ... 223, 406
Open door .................... 116, 118
Seat belt ....................... 405, 406
Warning label ............................ 71
Warning lights ........................ 402 ABS ...................................... 404
Brake hold operated indicator........................................... 409 Brake Override System ........404
Brake system ........................402
Charging system ..................403
Cruise control indicator.........407
Drive-Start Control
................404
Driving assist information indica- tor .......................................408
Dynamic radar cruise control indicator ..............................407
Electric power steering .........405
High coolant temperature .....402
Hybrid system overheat ........403
Intuitive parking assist OFF indi- cator ...................................407
LDA indicator ........................407
Low engine oil pressure .......403
Low fuel level........................405
LTA indicator .........................406
Malfunction indica tor lamp ....403
Parking brake indicator.........408
Pre-collision syst em .............407
Seat belt reminder light 405, 406
Slip indicator .........................408
SRS ......................................404
Tire pressure ...... ..................406
Warning messages .................412
Washer Checking ..............................355
Preparing and checking before winter ..................................291
Switch ...................................198
Washing and waxing ..............334
Weight Cargo capacity .....................163
Load limits ............................163
Wheels Replacing .............................376
Replacing wheels .................370
Size ......................................449
Window lock switch ...............145
Windows Power windows ....................143