coolant temperature TOYOTA RAV4 HYBRID 2021 User Guide

6768-2. Steps to take in an emergency
■If the engine coolant tem-
perature gauge enters the
red zone or “Engine Cool-
ant Temp High Stop in a
Safe Place See Owner’s
Manual” is shown on the
multi-information display
1 Stop the vehicle in a safe
place and turn off the air con-
ditioning system, and then
stop the hybrid system. 2
If you see steam:
Carefully lift the hood after
the steam subsides.
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 fan
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
4The coolant level is satisfac-
tory if it is between the
“FULL” and “LOW” lines on
the reservoir.
Reservoir
“FULL” line
If your vehicle over-
heats
The following may indicate
that your vehicle is over-
heating.
The needle of the engine
coolant temperature gauge
( P.94, 98) enters the red
zone, or a loss of hybrid
system power is experi-
enced. (For example, the
vehicle speed does not
increase.)
 “Engine Coolant Temp High
Stop in a Safe Place See
Owner’s Manual” or “Hybrid
System Overheated Output
Power Reduced” is shown
on the multi-information dis-
play.
 Steam comes out from
under the hood.
Correction procedures
A
B
A
B

6778-2. Steps to take in an emergency
8
When trouble arises
“LOW” line
5 Add coolant if necessary.
Water can be us ed in an emer-
gency if engine coolant is unavail-
able.
If water was added in an emer-
gency, have the vehicle inspected
at your Toyota dealer as soon as
possible.
6 Start the hybrid system and
turn the air conditioning sys-
tem on to check that the radi-
ator cooling 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 op erating 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 f an may not oper-
ate in freezing temperatures.)
7 If the fan is not operating:
Stop the hybrid system
immediately and contact your
Toyota dealer.
If the fan is operating:
Have the vehicle inspected at
the nearest Toyota dealer.
8 Check if “Engine Coolant
Temp High Stop in a Safe
Place See Owner’s Manual” is shown on the multi-infor-
mation display.
If the message does not disappear:
Stop the hybrid system and contact
your Toyota dealer.
If the message is not displayed:
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.
3 After the hybrid system has
cooled down, inspect the
hoses and radiator core (radi-
ator) for any leaks.
Radiator
Cooling fan
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
4The coolant level is satisfac-
tory if it is between the
C
A
B

6788-2. Steps to take in an emergency
“FULL” and “LOW” lines on
the reservoir.
Reservoir
“FULL” line
“LOW” line
5 Add coolant if necessary.
Water can be us ed in an emer-
gency if power control unit coolant
is unavailable.
If water was added in an emer-
gency, have the vehicle inspected
at your Toyota dealer as soon as
possible.
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 disappear:
Stop the hybrid system and contact
your Toyota dealer.
If the message is not displayed:
The hybrid system temperature has dropped and the vehicle may be
driven normally.
However, if the message appears
again frequently, contact your
Toyota dealer.
A
B
C
WARNING
■When inspecting under the
hood of your vehicle
Observe the following precau-
tions.
Failure to do so may result in seri-
ous 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 oper-
ating, the gasoline engine may
automatically start, or the cool-
ing fan 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 cap while the hybrid system
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.

7009-1. Specifications
■Temperature A, B, C
The temperature grades are A
(the highest), B, and C, repre-
senting the tire’s resistance to
the generation of heat and its
ability to dissipate heat when
tested under controlled condi-
tions on a specified indoor labo-
ratory test wheel.
Sustained high temperature can
cause the material of the tire to
degenerate and reduce tire life, and
excessive temperature can lead to
sudden tire failure.
Grade C corresponds to a level of performance which all passenger
car tires must meet under the Fed-
eral Motor Vehicle Safety Standard
No. 109.
Grades B and A represent higher
levels of performance on the labo-
ratory test wheel than the minimum
required by law.
Warning: The temperature grades
of a tire assume tha
t it is properly
inflated and not overloaded.
Excessive speed, underinflation, or
excessive loading, either sepa-
rately or in combination, can cause
heat buildup and possible tire fail-
ure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked
for three hours or more, or has not been driven
more than 1 mile or 1.5 km under that condition
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a
tire may be inflated, shown on the sidewall of
the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in excess of those stan-
dard items which may be replaced) of transmis-
sion, power steering, power brakes, power
windows, power seats, radio and heater, to the
extent that these items are available as factory-
installed equipment (whether installed or not)
Curb weight
The weight of a motor vehicle with standard
equipment, including th e maximum capacity of
fuel, oil and coolant, and if so equipped, air con-
ditioning and additional weight optional engine

Alphabetical Index739
Jam protection function ........ 183
Operation ............................. 182
Emergency, in case of If a warning buzzer sounds .. 642
If a warning light turns on ..... 642
If a warning message is dis-played................................. 654
If the 12-volt battery is dis- charged .............................. 672
If the electronic key does not operate properly ................. 670
If the fuel filler door cannot be opened ............................... 669
If the hybrid sy stem will not start
........................................... 667
If the vehicle is trapped in rising water .................................. 636
If you have a flat tire ............. 658
If you lose your keys ............ 668
If you think something is wrong ........................................... 641
If your vehicle becomes stuck ........................................... 680
If your vehicle has to be stopped in an emergency................. 635
If your vehicle needs to be towed ........................................... 637
If your vehicle overheats ...... 677
Emergency flashers ............... 634
Energy monitor ....................... 113
Engine Compartment ....................... 582
Hood..................................... 579
Identification number ............ 685
Engine coolant Capacity ............................... 688
Checking .............................. 584
Preparing and c hecking before
winter.................................. 378
Warning light ........................ 643
Engine coolant temperature gauge................................. 94, 98 Engine oil
Capacity ...............................686
Checking ..............................582
Preparing and checking before winter ..................................378
Warning light ........................643
Enhanced Vehicle Stability Con- trol (Enhanced VSC ) .............369
Enhanced VSC (Enhanced Vehi- cle Stability Control).............369
Entering letters and numbers/list screen operation...................397Entering letters and numbers397
List screen ............................398
EPS (Electric Po wer Steering)
Function................................370
Warning light ........................644
Establishing an Android Auto connection .......... ..................420
Establishing an Apple CarPlay connection .......... ..................419
EV drive mode.........................217
Event data recorder (EDR) .......10
EV indicator...............................73
F
Flat tire.....................................658 Tire pressure warning system...........................................593
Floor mats .................................28
Fluid Brake ............................586, 689
Hybrid transmission ..............689
Rear differential ....................689
Washer .................................587
FM ............................................437
Fog lights Replacing light bulbs ............624
Switch ...................................235
Wattage ................................692
Footwell lights ........................534
Front passenger’s seat belt

750Alphabetical Index
system ..................................... 74
Vehicle Stability Control (VSC) ............................................... 369
Ventilators (seat ventilators) . 531
Voice button (Setup screen).. 392
Voice command system ........ 470 Voice command system opera-tion ..................................... 471
VSC (Vehicle Stability Control) ............................................... 369
W
Warning buzzers Approach warning ................ 278
Brake hold ............................ 648
Brake Override System ........ 648
Brake system ....................... 642
Downshifting......................... 222
Drive-Start Control ............... 648
Electric power steering ......... 644
High coolant temperature ..... 643
Intuitive parking assist OFF indi-cator ................................... 646
Intuitive parking assist .......... 291
Low engine oil pressure ....... 643
LTA (Lane Tracing Assist).... 258
LTA indicator ........................ 645
Open door ............................ 131
Open hood ........................... 131
Open window ....................... 177
PKSB OFF indicato r ............. 646
Pre-collision warning ............ 250
RCTA (Rear Cross Traffic Alert) ........................................... 283
RCTA OFF indicator............. 647
Seat belt reminde r ........ 649, 650
Vehicle sway warning........... 262
Warning lights ABS ...................................... 644
Brake hold operated indicator........................................... 648
Brake Override System ........ 648 Brake system ........................642
Charging system ..................642
Drive-Start Control
................648
Electric power steering .........644
Engine ..................................643
High coolant temperature .....643
Intuitive parking assist OFF indi- cator ...................................646
Low engine oil pressure .......643
Low fuel level........................649
LTA indicator ........................645
Malfunction indica tor lamp ....643
Parking brake indicator.........648
PCS warning light .................645
PKSB (Parking Support Brake) ...........................................648
PKSB OFF indicator .............646
RCTA OFF indicator .............647
Seat belt reminder light 649, 650
Slip indicator .........................647
SRS ......................................644
Tire pressure ...... ..................649
Warning messages .................654
Washer Checking ..............................587
Low washer fluid warning mes-sage............................587, 654
Preparing and checking before winter ..................................378
Switch ...........................236, 239
Washing and waxing ..............566
Weight Cargo capacity .............196, 199
Load limits ............................199
Weight ..................................684
Wheels .....................................607 Replacing wheels .................607
Size ......................................690
Wi-Fi
®.......................................414
Connecting a device to the in- vehicle access point ...........414
Operating hints .....................417