2023 TOYOTA RAV4 PLUG-IN HYBRID coolant level

481
7
7-3. Do-it-yourself maintenance
Maintenance and care
■Engine oil consumption
A certain amount of engine oil will be
consumed while driving. In the following situations, oil consumption may increase, and engine oil may need to be
refilled in between oil maintenance inter- vals.
●When the engine is new, for example directly after purchasing the vehicle or after replacing the engine
●If low quality oil or oil of an inappropri-ate viscosity is used
●When driving at high engine speeds or with a heavy load, when towing, or
when driving while accelerating or decelerating frequently
●When leaving the engine idling for a long time, or when driving frequently through heavy traffic
The coolant level is satisfactory if it
is between the “FULL” and “LOW”
lines on the reservoir when the
hybrid system is cold.
■Engine coolant reservoir
Reservoir cap
“FULL” line
WARNING
■Used engine oil
●Used engine oil contains poten-
tially harmful contaminants which may cause skin disorders such as inflammation and skin cancer, so
care should be taken to avoid pro- longed and repeated contact. To remove used engine oil from your
skin, wash thoroughly with soap and water.
●Dispose of used oil and filters only in a safe and acceptable manner. Do not dispose of used oil and fil-
ters in household trash, in sewers or onto the ground. Call any autho-rized Toyota retailer or Toyota
authorized repairer, or any reliable repairer, service station or auto parts store for information concern-
ing recycling or disposal.
●Do not leave used engine oil within
the reach of children.
NOTICE
■To prevent serious engine dam- age
Check the oil level on a regular basis.
■When replacing the engine oil
●Be careful not to spill engine oil on the vehicle components.
●Avoid overfilling, or the engine could be damaged.
●Check the oil level on the dipstick every time you refill the vehicle.
●Be sure the engine oil filler cap is properly tightened.
■If oil is spilled on the engine cover
To prevent the engine cover from
being damaged, remove any engine oil from the engine cover as soon as possible using a neutral detergent. Do
not use an organic solvent such as brake cleaner.
Checking the coolant
A
B

4827-3. Do-it-yourself maintenance
“LOW” line
If the level is on or below the “LOW”
line, add coolant up to the “FULL” line.
( P.578)
■Power control unit coolant
reservoir
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the “LOW”
line, add coolant up to the “FULL” line.
( P.580)
■Coolant selection
Only use “Toyota Super Long Life Coo- lant” or a similar high quality ethylene glycol based non-silicate, non-amine,
non-nitrite, and non-borate coolant with long-life hybrid organic acid technology.“Toyota Super Long Life Coolant” is a
mixture of 50% coolant and 50% deion- ized water. (Minimum temperature: -35°C [-31°F])
For more details about coolant, contact any authorized Toyota retailer or Toyota authorized repairer, or any reliable
repairer.
■If the coolant level drops within a short time of replenishing
Visually check the radiators, hoses,
engine/power control unit coolant reser- voir caps, drain cock and water pump.If you cannot find a leak, have any
authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer, test the cap and check for leaks in the cooling system.
Check the radiator and condenser,
and clear away any foreign objects.
If either of the above parts is
extremely dirty or you are not sure
of their condition, have your vehicle
inspected by any authorized Toyota
retailer or Toyota authorized
repairer, or any reliable repairer.
C
A
B
C
WARNING
■When the hybrid system is hot
Do not remove the engine/power con- trol unit coolant reservoir caps.
The cooling system may be under pressure and may spray hot coolant if the cap is removed, causing serious
injuries, such as burns.
NOTICE
■When adding coolant
Coolant is neither plain water nor straight antifreeze. The correct mix-ture of water and antifreeze must be
used to provide proper lubrication, corrosion protection and cooling. Be sure to read the antifreeze or coolant
label.
■If you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or
paint.
Checking the radiator and
condenser

483
7
7-3. Do-it-yourself maintenance
Maintenance and care
Without level gauge
Type A: If any washer does not
work, the washer tank may be
empty. Add washer fluid.
Type B: If any washer does not
work or the warning message
appears on the multi-information
display, the washer tank may be
empty. Add washer fluid.
With level gauge
If the washer fluid level is at “LOW”,
add washer fluid.
■Using the gauge (if equipped)
The washer fluid level can be checked
by observing the position of the level on the liquid-covered holes in the gauge.
If the level falls below the second hole
from the bottom (the “LOW” position), refill the washer fluid.
Current fluid level
WARNING
■When the hybrid system is hot
Do not touch the radiator or con-
denser as they may be hot and cause serious injuries, such as burns.
■When the electric cooling fan is operating
Do not touch the engine compart-
ment.
With the power switch in ON, the electric cooling fan may automatically
start to run if the air conditioning is on and/or the coolant temperature is high. Be sure the power switch is off
when working near the electric cool- ing fan or radiator grille.
Checking and adding the
washer fluid
WARNING
■When adding washer fluid
Do not add washer fluid when the hybrid system is hot or operating as
washer fluid contains alcohol and may catch fire if spilled on the hybrid system, etc.
A

579
8
8-2. Steps to take in an emergency
When trouble arises
3 After the hybrid system has
cooled down sufficiently, inspect
the hoses and radiator core
(radiator) for any leaks.
Radiator
Cooling fan
If a large amount of coolant leaks, immediately contact any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
4 The coolant level is satisfactory
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 emergency if
engine coolant is unavailable. If water was added in an emergency,
have the vehicle inspected at any
authorized Toyota retailer or Toyota authorized repairer, or any reliable repairer as soon as possible.
6 Start the hybrid system and turn
the air conditioning system on to
check that the radiator cooling
fan operates and to check for
coolant leaks from the radiator
or hoses.
The fan operates when the air condi- tioning system is turned on immediately
after a cold start. Confirm that the fan is operating by checking the fan sound and air flow. If it is difficult to check
these, adjust the temperature control switch to “LO” and turn the “A/C” switch ON and OFF. After this, turn the air
conditioning system on and off repeat- edly. (The fan may not operate in freez-ing temperatures.)
7 If the fan is not operating:
Stop the hybrid system immedi-
ately and contact any authorized
Toyota retailer or Toyota autho-
rized repairer, or any reliable
repairer.
If the fan is operating:
Have the vehicle inspected at
the nearest authorized Toyota
retailer or Toyota authorized
repairer, or any reliable repairer.
A
B
A
B
C

5808-2. Steps to take in an emergency
8Check if “Engine Coolant Temp
High Stop in a Safe Place See
Owner’s Manual” is shown on
the multi-information display.
If the message does not disap-
pear:
Stop the hybrid system and con-
tact any authorized Toyota
retailer or Toyota authorized
repairer, or any reliable repairer.
If the message is not displayed:
Have the vehicle inspected at
the nearest authorized Toyota
retailer or Toyota authorized
repairer, or any reliable repairer.
■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 (radiator) for
any leaks.
Radiator
Cooling fan
If a large amount of coolant leaks,
immediately contact any authorized Toyota retailer or Toyota authorized repairer, or any reliable repairer.
4 The coolant level is satisfactory
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 emergency if power control unit coolant is unavail-able.
If water was added in an emergency, have the vehicle inspected at any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer as soon as possible.
6 After stopping the hybrid system
and waiting for 5 minutes or
more, start the hybrid system
A
B
A
B
C

620Alphabetical Index
light.............................................. 541
Front position lights
Light switch ................................ 326
Replacing light bulbs .................. 516
Front seat concentrated airflow
mode (S-FLOW) .......................... 435
Front seat heaters ........................ 440
Front seats .................................... 258
Adjustment ................................. 258
Cleaning ..................................... 469
Correct driving posture................. 33
Driving position memory ............ 261
Head restraints........................... 264
Memory recall function ............... 262
Seat heaters............................... 440
Seat position memory ................ 261
Seat ventilators .......................... 440
Front turn signal lights
Replacing light bulbs .................. 516
Turn signal lever ........................ 319
Fuel
Capacity ..................................... 586
Fuel gauge ......................... 187, 193
Gas station information .............. 716
Information ................................. 592
Refueling .................................... 336
Type ........................................... 586
Warning light .............................. 541
Fuel filler door .............................. 337
If the fuel filler door cannot be
opened..................................... 570
Opener ....................................... 337
Refueling .................................... 336
Fuel gauge ............................ 187, 193
Fuses ............................................. 513
G
Gas station information ............... 716
Gauges .................................. 187, 193
Glove box ...................................... 446
GPF (Gasoline Particulate Filter) system ......................................... 414
H
Headlight cleaner .......................... 332
Headlights ..................................... 326
Automatic headlight leveling ...... 327
Automatic High Beam (AHB)...... 328
Extended Headlight Lighting system
................................................. 327
Light switch ................................ 326
Replacing light bulbs ..................516
Head restraints.............................. 264
Head-up display ............................ 222
Heated steering wheel ..................440
Heated Windshield Defroster....... 435
Heaters
Automatic air conditioning system
................................................. 430
Heated steering wheel ............... 440
Hybrid battery (traction battery).. 128
Outside rear view mirrors ........... 432
Seat heaters ............................... 440
High coolant temperature warning
light ..............................................535
High mounted stoplight
Replacing light bulbs ..................516
High voltage components ..............95
Hill-start assist control ................. 416
Hood............................................... 476
Warning message ...................... 544
Hooks
Cargo hooks ............................... 449
Coat hooks ................................. 463
Retaining hooks (floor mat) .......... 32
Horn ............................................... 266
HV mode ..........................................85
Hybrid battery (traction battery)
Charging............................. 127, 135
Location........................................ 95
Specification ............................... 586
Hybrid battery (traction battery)

628Alphabetical Index
Utility vehicle precautions ........... 425
V
Vanity lights
Vanity lights................................ 453
Wattage...................................... 591
Vanity mirrors ............................... 453
Vehicle data recordings ................... 7
Vehicle identification number ..... 584
Vehicle Stability Control (VSC) ... 415
Ventilators (seat ventilators) ....... 440
VSC (Vehicle Stability Control) ... 415
W
Warning buzzers
Approach warning ...................... 375
Brake hold .................................. 540
Brake Override System .............. 540
Brake system ............................. 534
BSM OFF indicator .................... 539
Charging system ........................ 535
Downshifting ...................... 317, 318
Drive-Start Control ..................... 540
Electric power steering............... 536
High coolant temperature........... 535
Hybrid system overheat ............. 535
Low engine oil pressure ............. 535
LTA (Lane Tracing Assist) . 353, 537
Open door .................................. 238
Open hood ................................. 238
Open window ............................. 280
PKSB OFF indicator................... 538
Pre-collision warning .......... 343, 537
Radar cruise control ................... 375
RCTA (Rear Crossing Traffic Alert)
................................................. 387
RCTA OFF indicator .................. 539
RSA (Road Sign Assist) ............. 364
Seat belt reminder.............. 541, 542
Shift position ...................... 317, 318Toyota parking assist ................. 395
Toyota parking assist-sensor OFF
indicator ...................................538
Vehicle sway warning................. 357
Warning lights
ABS ............................................ 536
Brake hold operated indicator .... 540
Brake Override System .............. 540
Brake system .............................534
BSM OFF indicator..................... 539
Charging system ........................ 535
Driver’s seat belt reminder light.. 541
Drive-Start Control ..................... 540
Electric power steering ............... 536
Engine ........................................536
Front passenger’s seat belt reminder
light .......................................... 541
High coolant temperature ........... 535
Hybrid system overheat ............. 535
Low engine oil pressure ............. 535
Low fuel level .............................541
LTA indicator .............................. 537
Malfunction indicator lamp ......... 536
Parking brake indicator .............. 540
PCS warning light.......................537
PKSB OFF indicator ................... 538
PKSB.......................................... 538
RCTA OFF indicator................... 539
Rear passengers’ seat belt reminder
lights......................................... 542
Seat belt reminder light ...... 541, 542
Slip indicator............................... 539
SRS ............................................ 536
Tire pressure .............................. 541
Toyota parking assist-sensor OFF
indicator ...................................538
Warning messages .......................544
Washer
Checking .................................... 483
Low washer fluid warning message
......................................... 483, 544