overheating TOYOTA PRIUS PRIME 2022 Owners Manual

PRIUS PRIME_OM_OM47E74U_(U)
1212-2. Charging
2
Plug-in hybrid system
For safety, inspect the charging cable on a routine basis.
Inspecting and maintaining the charging cable
WARNING
■Routine inspection
Check the following points regularly.
Failure to do so may cause an unexpected accident, resulting in death or
serious injury.
● The charging cable, plug, charging connector, CCID (Charging Ci rcuit
Interrupting Device) etc. have not been damaged
● The outlet has not been damaged
● The plug can be securely inserted into the outlet
● The plug does not get extremely hot during use
● The tip of the plug has not been deformed
● The plug is not dirtied by dust etc.
Remove the plug from the outlet before inspecting it. If any ab normalities
are found in the charging cable as a result of the inspection, immediately
stop use and consult your Toyota dealer.
■ Maintaining the charging cable
When the charging cable is dirty, first remove the dirt with a hard, wringed
cloth, and then wipe the cable with a dry cloth.
However, never wash it with water. If the charging cable is washed with
water, fire or electric shock may occur during charging, possib ly resulting in
death or serious injury.
■ When not using the charg ing cable for a long time
Remove the plug from the outlet. Dust could accumulate on the plug or in
the outlet, possibly causing overheating which could lead to a fire.
Also, keep the cable in a place free from moisture.

208
PRIUS PRIME_OM_OM47E74U_(U)
3. Instrument cluster
■BSM (Blind Spot Monitor) outsid e rear view mirror indicators
(if equipped) ( P. 427)
• When the BSM function is enabled on the screen of the multi-infor- mation display, the power switch is turned to ON mode.
If the system is functioning correctly, the BSM outside rear vi ew mirror indi-
cators will turn off after a few seconds.
If the BSM outside rear view mirror indicators do not illuminat e or do not
turn off, there may be a malfunction in the system.
If this occurs, have the vehicle inspected by your Toyota deale r.
●
Indicators are also displayed on the out-
side rear view mirrors.
● In order to confirm operation, the BSM
outside rear view mirror indicators illumi-
nate in the following situations:
• When the power switch is in ON
mode, the BSM function is enabled
on the screen of the multi-infor-
mation display.
WARNING
■If a safety system warning light does not come on
Should a safety system light such as the ABS and SRS warning li ght not
come on when you start the hybrid system, this could mean that these sys-
tems are not available to help protect you in an accident, which could result
in death or serious injury. Have the vehicle inspected by your Toyota dealer
immediately if this occurs.
NOTICE
■To prevent damage to the engine and its components
The engine may be overheating if the high coolant temperature warning
light comes on or flashes. In this case, immediately stop the v ehicle in a
safe place, and check the engine after it has cooled completely. (P. 718)

PRIUS PRIME_OM_OM47E74U_(U)
3235-1. Before driving
5
Driving
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When taking a nap in the vehicle
Always turn the hybrid system off. Otherwise, if you accidentally move the
shift lever or depress the accelerator pedal, this could cause an accident or
fire due to hybrid system overheating. Additionally, if the veh icle is parked in
a poorly ventilated area, exhaust gases may collect and enter the vehicle,
leading to death or a serious health hazard.
■ When braking
● When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and this may cause
one side of the vehicle to brake differently than the other side. Also, the
parking brake may not securely hold the vehicle.
● If the electronically controlled assist function does not operate, do not fol-
low other vehicles closely and avoid downhill or sharp turns th at require
braking.
In this case, braking is still possible, but the brake pedal should be
depressed more firmly than usual. Also, the braking distance will increase.
Have your brakes fixed immediately.
● The brake system consists of 2 or more individual hydraulic systems; if
one of the systems fails, the other(s) will still operate. In this case, the
brake pedal should be depressed more firmly than usual and the braking
distance will increase. Have your brakes fixed immediately.

346
PRIUS PRIME_OM_OM47E74U_(U)
5-2. Driving procedures
Parking brake
To set the parking brake, fully
depress the parking brake pedal
with your left foot while depress-
ing the brake pedal with your right
foot.
(Depressing the pedal again
releases the parking brake.)
■Parking the vehicle
P. 315
■ Parking brake engaged warning buzzer
A buzzer will sound if the vehicle is driven with the parking b rake engaged.
“Release Parking Brake” is displayed on the multi-information display (with
the vehicle reached a speed of 3 mph [5 km/h]).
■ Usage in winter time
P. 503
Operating instructions
(U.S.A.)
(Canada)
NOTICE
■ Before driving
Fully release the parking brake.
Driving the vehicle with the parking brake set will lead to bra ke components
overheating, which may affect braking performance and increase brake
wear.

PRIUS PRIME_OM_OM47E74U_(U)
4995-5. Using the driving support systems
5
Driving
■ECB operating sound
ECB operating sound may be heard in the following cases, but it does not
indicate that a malfunction has occurred.
● Operating sound heard from the engine compartment when the brak e pedal
is operated.
● Motor sound of the brake system heard from the front part of th e vehicle
when the driver’s door is opened.
● Operating sound heard from the engine compartment when one or t wo min-
utes passed after the stop of the hybrid system.
■ EPS operation sound
When the steering wheel is operated, a motor sound (whirring so und) may be
heard. This does not indicate a malfunction.
■ Automatic reactivation of TRAC and VSC systems
After turning the TRAC and VSC systems off, the systems will be automati-
cally re-enabled in the following situations:
● When the power switch is turned off
● If only the TRAC system is turned off, the TRAC will turn on wh en vehicle
speed increases
If both the TRAC and VSC systems are turned off, automatic re-e nabling
will not occur when vehicle speed increases.
■ Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the s ystem from
overheating when there is frequent steering input over an exten ded period of
time. The steering wheel may feel heavy as a result. Should thi s occur, refrain
from excessive steering input or stop the vehicle and turn the hybrid system
off. The EPS system should return to normal within 10 minutes.
■ Electric power steering system wa rning light (warning buzzer)
P. 672

718
PRIUS PRIME_OM_OM47E74U_(U)
8-2. Steps to take in an emergency
If your vehicle overheats
■If the high coolant temperature warning light comes on or
flashesStop the vehicle in a safe place and turn off the air conditioning
system, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has cooled down sufficiently, inspect t he
hoses and radiator core (ra diator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact
your Toyota dealer.
The following may indicate that your vehicle is overheating.
● The high coolant temperature warning light ( P. 673) comes on
or flashes, or a loss of hybrid system power is experienced. (F or
example, the vehicle s peed does not increase.)
● “Hybrid System Overheated” is shown on the multi-information
display.
● Steam comes out from under the hood.
Correction procedures
1
2
3
1
2

787Alphabetical index
PRIUS PRIME_OM_OM47E74U_(U)
Radar sensor ........................ 372
Seat belts .............................. 582
Water-repellent coating......... 575
Clock ......................................... 192 Adjustment ............................ 197
Coat hooks ............................... 562
Combination meter .................. 192 Clock adjustment .................. 197
Main display .......................... 209
Multi-information display ....... 220
Warning lights and
indicators ............................ 201
Condenser ................................ 604
Console box ............................. 541
Consumption screen ....... 264, 269
Coolant ..................................... 602 Capacity ................................ 731
Checking ............................... 602
Preparing and checking before winter....................... 502
Cooling system ........................ 602 Engine overheating ............... 718
Hybrid system overheating ... 720
Cruise control Dynamic radar cruise control with full-speed range .......... 409
Cup holders.............................. 542
Curtain shield airbags ............... 36
Customizable features ............ 749
Daytime running light system .................................... 350
Deck board ............................... 545
Defogger Outside rear view
mirrors ........................ 512, 523
Rear window ................. 512, 523
Windshield .................... 511, 523 Dimension ................................ 726
Dinghy towing.......................... 331
Display
BSM (Blind Spot Monitor) ..... 427
Drive information .................. 222
Dynamic radar cruise control with full-speed range .......... 409
Energy monitor ..... 223, 261, 266
Head-up display.................... 253
Intuitive parking assist .......... 442
LTA (Lane Tracing Assist) .... 399
Main display.......................... 209
Multi-information display ....... 220
Parking Support Brake
function............................... 457
Pre-collision warning ............ 380
RSA (Road Sign Assist) ....... 406
S-APGS (Simple Advanced Parking Guidance
System) .............................. 466
Warning messages ............... 681
Do-it-yourself maintenance .... 592
Door courtesy lights ............... 537 Location ................................ 537
Wattage ................................ 734
Doors ................................ 279, 285 Automatic door locking
and unlocking system......... 282
Back door ............................. 285
Door glasses......................... 309
Door lock .............................. 279
Open door warning buzzer ... 283
Open door warning light ....... 673
Outside rear view mirrors ..... 307
Rear door child-protectors .... 282
Side doors ............................ 279
Side windows........................ 309
D
*: Refer to “MULTIMEDIA OWNER’S MANUAL”.

789Alphabetical index
PRIUS PRIME_OM_OM47E74U_(U)
EngineAccessory mode ................... 334
Compartment ........................ 598
Engine switch........................ 332
Exhaust gas precautions ........ 56
Hood ..................................... 595
How to start the hybrid system ......... ....................... 332
Identification number ............ 728
If the hybrid system will not start .................................... 706
If your vehicle has to be stopped in an emergency ... 661
Ignition switch (power
switch) ................................ 332
Overheating .......................... 718
Power switch......................... 332
Engine coolant ......................... 602 Capacity ................................ 731
Checking ............................... 602
Preparing and checking before winter....................... 502
Engine oil ................................. 599
Capacity ................................ 730
Checking ............................... 599
Oil pressure warning light ..... 671
Preparing and checking before winter....................... 502
Engine switch (power switch) .................................... 332
Auto power off function ......... 334
Changing the power switch modes................................. 334
If your vehicle has to be stopped in an emergency ... 661
Starting the hybrid system .... 332 EPS (Electric Power
Steering) ................................ 497
Function ................................ 497
Warning light......................... 672
EV auto mode ............................ 87
EV driving range ...................... 109
EV mode ..................................... 87
EV/HV mode selection
switch ....................................... 90
Event data recorder (EDR)........ 11
Exhaust gas precautions .......... 56
Flat tire ..................................... 689
Floor mats .................................. 26
Fluid Brake .................................... 733
Transmission ........................ 732
Washer ................................. 610
Fog lights ................................. 357
Replacing light bulbs ............ 657
Switch ................................... 357
Footwell lights ......................... 537
Front doors .............................. 279
Front fog lights ........................ 357
Replacing light bulbs ............ 657
Switch ................................... 357
Front passenger occupant classification system .............. 50
Front passenger’s seat
belt reminder light................. 674
Front seat concentrated airflow mode
(S-FLOW) ....................... 510, 522
F

791Alphabetical index
PRIUS PRIME_OM_OM47E74U_(U)
Hybrid battery (traction battery) ..................................... 99
Air intake vent ....................... 100
Charging ............................... 111
Location .................................. 99
Specification ......................... 729
Status indicator ..................... 113
Hybrid battery (traction
battery) air intake vent .......... 100 Cleaning................................ 580
Hybrid system ............................ 86
Brake Override System......... 316
Consumption screen................. 233, 264, 269
Drive-Start Control ................ 316
Emergency shut off system .. 100
Energy monitor ..... 223, 261, 266
High voltage components ....... 99
Hybrid System Indicator........ 225
If the hybrid system will not start .................................... 706
Overheating .......................... 718
Plug-in hybrid system precautions ........................... 99
Plug-in hybrid vehicle driving tips ...................................... 106
Power switch......................... 332
Regenerative braking.............. 95
Starting the hybrid system .... 332
Vehicle proximity notification
system ......... ......................... 93
Hybrid System Indicator ......... 225
Hybrid transmission ................ 339 I/M test ...................................... 591
Identification ............................ 727
Engine .................................. 728
Vehicle .................................. 727
Ignition switch (power
switch).................................... 332 Auto power off function ......... 334
Changing the power switch modes ................................ 334
If your vehicle has to be stopped in an emergency ... 661
Starting the hybrid system .... 332
Illuminated entry system ........ 539
Immobilizer system ................... 83
Indicators ................................. 201
Initialization.............................. 761 Items to initialize ................... 761
Maintenance data ................. 586
Parking Support Brake function............................... 458
Power windows..................... 310
S-APGS (Simple Advanced Parking Guidance
System) .............................. 486
Tire pressure warning system .......... ...................... 614
Inside rear view mirror ............ 305
Instrument cluster light
control .................................... 194
Interior lights ........................... 537
Switch ........................... 538, 539
Wattage ................................ 734
Intuitive parking assist ........... 441I
*: Refer to “NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.

793Alphabetical index
PRIUS PRIME_OM_OM47E74U_(U)
Main display ............................. 209
MaintenanceDo-it-yourself maintenance ... 592
General maintenance ........... 588
Maintenance data ................. 726
Maintenance requirements ... 585
Malfunction indicator lamp ..... 671
Master warning light................ 681
Meter ......................................... 192 Clock adjustment .................. 197
Combination meter ............... 192
Head-up display .................... 253
Indicators .............................. 204
Instrument cluster light control................................. 194
Main display .......................... 209
Multi-information display ....... 220
Warning lights ....................... 202
Warning messages ............... 681
Microphone
*1, 2......................... 76
Mirrors Inside rear view mirror .......... 305
Outside rear view mirror defoggers ................... 512, 523
Outside rear view mirrors...... 307
Vanity mirrors........................ 549
MP3 disc
*1
Multi-information display ........ 220
Air conditioning system settings screen ................... 241
Audio system-linked display ................................ 240
BSM (Blind Spot Monitor) ..... 427
Display contents ................... 220
Drive information................... 222
Driving assist system
information.......................... 245
Dynamic radar cruise control with full-speed range .......... 409 Energy monitor ..................... 223
Intuitive parking assist .......... 442
Language.............................. 248
LTA (Lane Tracing Assist) .... 399
Navigation system-linked
display ................................ 240
Parking Support Brake function............................... 457
Pre-collision warning ............ 380
RSA (Road Sign Assist) ....... 406
S-APGS (Simple Advanced Parking Guidance
System) .............................. 466
Settings................................. 246
Warning message................. 245
Navigation system
*2
Noise from under vehicle ........... 8
Odometer ................................. 213
Oil Engine oil .............................. 730
Opener Back door ............................. 285
Fuel filler door ....................... 367
Garage door ......................... 564
Hood ..................................... 595
Outside rear view mirrors ....... 307
Adjustment............................ 307
BSM (Blind Spot Monitor) ..... 427
Folding .................................. 307
Outside rear view mirror defoggers ................... 512, 523
Outside temperature
display.................................... 209
Overhead console ................... 544
Overheating ............................. 718
M
N
O
*1: Refer to “MULTIMEDIA OWNER’S MANUAL”.
*2: Refer to “NAVIGATION S YSTEM OWNER’S MANUAL”.