engine overheat TOYOTA PRIUS PRIME 2019 Owners Manual (in English)

17Pictorial index
PRIUS PRIME_OM_OM47D13U_(U)Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 364
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 364
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 718
Charging port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 108
Charging method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 131
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . P. 600
Replacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 615
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . P. 723
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 491
Checking/rotation/tire pressur e warning system . . . . . . . . .P. 600
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 678
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 583
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 583
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 720
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 707
Headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 346
Parking lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 346
Fog lights
* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 356
LED accent lights
*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 346
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 344
Daytime running lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 346
Side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 346
Tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 346
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 346
Back-up lights
Shifting the shift position to R . . . . . . . . . . . . . . . . . . . . . . . . . P. 338
5
6
7
8
Light bulbs of the exterior lights for driving
(Replacing method: P. 641, Watts: P. 724)
*: If equipped
9
10
11
12
13
14
15
16
17
18

102
PRIUS PRIME_OM_OM47D13U_(U)
2-1. Plug-in hybrid system
NOTICE
■Hybrid battery (traction battery) air vents
● Make sure not to block the air intake vent with anything, such as a seat
cover, plastic cover, or luggage. The hybrid battery (traction battery) may
overheat and be damaged.
● When dust etc. has accumulated in the air intake vent, clean it with a vac-
uum cleaner to prevent the vent from clogging.
● Do not wet or allow foreign substances to enter the air vents a s this may
cause a short circuit and damage the hybrid battery (traction b attery).
● Do not carry large amounts of water such as water cooler bottle s in the
vehicle. If water spills onto the hybrid battery (traction batt ery), the battery
may be damaged. Have the vehicle inspected by your Toyota deale r.
● A filter is installed to the air intake vent. When the filter r emains noticeably
dirty even after cleaning the air intake vent, filter cleaning or replacement
is recommended. When cleaning the filter, refer to P. 568.
■ Notice about fuel
● For plug-in hybrid vehicles, fuel may remain in the tank for a long time and
undergo changes in quality depending on the how the vehicle is used.
Refuel at least 5.3 gal. (20 L, 4.4 Imp.gal.) of fuel every 12 months (refuel
a total of at least 5.3 gal. [20 L, 4.4 Imp.gal.] over a 12-mon th period), as
this may affect components of the fuel system or the gasoline engine.
● If the vehicle has not been refueled for a certain amount of ti me and it is
possible that the quality of the fuel remaining in the tank has changed, “No
new fuel has been added recently. Please refuel” is displayed on the multi-
information display when the power switch is turned to ON mode. If the
message is displayed, refuel the vehicle immediately.

PRIUS PRIME_OM_OM47D13U_(U)
2033. Instrument cluster
3
Instrument cluster
■BSM (Blind Spot Monitor) outsid e rear view mirror indicators
(if equipped) ( P. 417)
• When the BSM function is enabled on the screen of the multi-i nfor-
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, whic h 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 vehicle in a
safe place, and check the engine after it has cooled completely . (P. 707)

PRIUS PRIME_OM_OM47D13U_(U)
3195-1. Before driving
5
Driving
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When driving the vehicle
● Use engine braking (shift position B instead of shift position D) to maintain
a safe speed when driving down a steep hill.
Using the brakes continuously may cause the brakes to overheat and lose
effectiveness. ( P. 339)
● Do not adjust the positions of the steering wheel, the seat, or the inside or
outside rear view mirrors while driving.
Doing so may result in a loss of vehicle control.
● Always check that all passengers’ arms, heads or other parts of their body
are not outside the vehicle.
● Do not drive in excess of the speed limit. Even if the legal sp eed limit per-
mits it, do not drive over 85 mph (140 km/h) unless your vehicl e has high-
speed capability tires. Driving over 85 mph (140 km/h) may resu lt in tire
failure, loss of control and possible injury. Be sure to consult a tire dealer
to determine whether the tires on your vehicle are high-speed c apability
tires or not before driving at such speeds.
■ When driving on slippery road surfaces
● Sudden braking, acceleration and steering may cause tire slippa ge and
reduce your ability to control the vehicle.
● Sudden acceleration, engine braking due to shifting, or changes in engine
speed could cause the vehicle to skid, resulting in an accident .
● After driving through a puddle, depress the brake pedal to make sure that
the brakes are functioning properly. Wet brake pads may prevent the
brakes from functioning properly. If the brakes on only one sid e are wet
and not functioning properly, steering control may be affected.

PRIUS PRIME_OM_OM47D13U_(U)
3215-1. Before driving
5
Driving
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■If you hear a squealing or scrap ing noise (brake pad wear limit indica-
tors)
Have the brake pads checked and replaced by your Toyota dealer as soon
as possible.
Rotor damage may result if the pads are not replaced when needed.
It is dangerous to drive the vehicle when the wear limits of the brake pads
and/or those of the brake discs are exceeded.
■ When the vehicle is stopped
● Do not depress the accelerator pedal unnecessarily.
If the shift position is in any position other than P or N, the vehicle may
accelerate suddenly and unexpectedly, causing an accident.
● In order to prevent accidents due to the vehicle rolling away, always keep
depressing the brake pedal while stopped with the “READY” indic ator is
illuminated, and apply the parking brake as necessary.
● If the vehicle is stopped on an incline, in order to prevent ac cidents caused
by the vehicle rolling forward or backward, always depress the brake pedal
and securely apply the parking brake as needed.
● Avoid revving or racing the engine.
Running the engine at high speed while the vehicle is stopped m ay cause
the exhaust system to overheat, which could result in a fire if combustible
material is nearby.

7108-2. Steps to take in an emergency
PRIUS PRIME_OM_OM47D13U_(U)
After stopping the hybrid system and waiting for 5 minutes or
more, start the hybrid system again and check if “Hybrid System
Overheated” is shown on the multi-information display.
If the message d oes 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 To y o t a
dealer.
WARNING
■ To prevent an accident or injury when inspecting under the hood of
your vehicle
Observe the following precautions.
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 ho od until
the steam has subsided. The engine compartment may be very hot.
● After the hybrid system has been turned off, check that the “Accessory”,
“Ignition ON” or mileage display ( P. 205) on the main display and the
“READY” indicator are off.
When the hybrid system is operating, the gasoline engine may au tomati-
cally start, or the cooling fans may suddenly operate even if the gasoline
engine stops. Do not touch or approach rotating parts such as t he 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 reservoir caps while the hybrid syste m and radi-
ator are hot.
High temperature steam or coolant could spray out.
6

775Alphabetical index
PRIUS PRIME_OM_OM47D13U_(U)
Clock ......................................... 188Adjustment ............................ 193
Coat hooks ............................... 552
Combination meter .................. 188 Clock adjustment .................. 193
Main display .......................... 204
Multi-information display ....... 213
Warning lights and
indicators ............................ 196
Condenser ................................ 592
Console box ............................. 528
Consumption screen ....... 258, 264
Coolant ..................................... 590 Capacity ................................ 721
Checking ............................... 590
Preparing and checking before winter....................... 491
Cooling system ........................ 590 Engine overheating ............... 707
Hybrid system overheating ... 709
Cruise control .......................... 399 Dynamic radar cruise control with full-speed range .......... 399
Cup holders.............................. 529
Curtain shield airbags ............... 36
Customizable features ............ 739
Daytime running light system .................................... 349
Deck board ............................... 532
Defogger Outside rear view
mirrors ........................ 500, 511
Rear window ................. 500, 511
Windshield .................... 500, 510 Dimension ................................ 716
Dinghy towing.......................... 331
Display
BSM (Blind Spot Monitor) ..... 417
Drive information .................. 215
Dynamic radar cruise control with full-speed range .......... 399
Energy monitor ..... 216, 255, 261
Head-up display.................... 246
Intelligent Clearance Sonar.................................. 444
Intuitive parking assist .......... 430
LDA (Lane Departure Alert with steering control) .......... 393
Main display.......................... 204
Multi-information display ....... 213
Pre-collision warning ............ 377
S-APGS (Simple Advanced Parking Guidance
System) .............................. 455
Warning messages ............... 670
Do-it-yourself maintenance .... 580
Door courtesy lights ............... 524 Location ................................ 524
Wattage ................................ 724
Doors ................................ 275, 281 Automatic door locking
and unlocking system......... 278
Back door ............................. 281
Door glasses......................... 308
Door lock .............................. 275
Open door warning buzzer ... 662
Open door warning light ....... 662
Outside rear view mirrors ..... 306
Rear door child-protectors .... 278
Side doors ............................ 275
Side windows........................ 308
D
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.

777Alphabetical index
PRIUS PRIME_OM_OM47D13U_(U)
Emergency tire puncture repair kit ................................. 678
Energy monitor ........ 216, 255, 261
Engine Accessory mode ................... 334
Compartment ........................ 586
Engine switch........................ 332
Exhaust gas precautions ........ 56
Hood ..................................... 583
How to start the hybrid system ......... ....................... 332
Identification number ............ 718
If the hybrid system will not start .............................. 695
If your vehicle has to be stopped in an emergency ... 651
Ignition switch
(power switch) .................... 332
Overheating .......................... 707
Power switch......................... 332
Engine coolant ......................... 590 Capacity ................................ 721
Checking ............................... 590
Preparing and checking before winter....................... 491
Engine oil ................................. 587 Capacity ................................ 720
Checking ............................... 587
Oil pressure warning light ..... 660
Preparing and checking
before winter....................... 491 Engine switch .......................... 332
Auto power off function ......... 334
Changing the power
switch modes ..................... 334
If your vehicle has to be
stopped in an emergency ... 651
Starting the hybrid system .... 332
EPS (Electronic Power
Steering) ................................ 486 Function ................................ 486
Warning light......................... 661
EV auto mode ............................ 85
EV driving range ...................... 106
EV mode ..................................... 85
EV/HV mode selection switch ....................................... 88
Event data recorder (EDR)........ 11
Exhaust gas precautions .......... 56
Flat tire ..................................... 678
Floor mats .................................. 26
Fluid
Brake .................................... 723
Transmission ........................ 722
Washer ................................. 598
Fog lights ................................. 356
Replacing light bulbs ............ 646
Switch ................................... 356
Footwell lights ......................... 524
Front doors .............................. 275
Front passenger occupant classification system .............. 50
Front passenger’s seat belt reminder light................. 662
F

779Alphabetical index
PRIUS PRIME_OM_OM47D13U_(U)
Hybrid battery (traction battery)...................... 96
Air intake vent ......................... 97
Charging ............................... 108
Location .................................. 96
Specification ......................... 719
Status indicator ..................... 110
Hybrid battery (tr action battery)
air intake vent .......................... 97
Hybrid system ............................ 84 Brake Override System......... 315
Consumption
screen................. 226, 258, 264
Drive-Start Control ................ 316
Emergency shut off system .... 97
Energy monitor ..... 216, 255, 261
High voltage components ....... 96
Hybrid System Indicator........ 218
If the hybrid system will not start .............................. 695
Overheating .......................... 707
Plug-in hybrid system precautions ........................... 96
Plug-in hybrid vehicle driving tips ...................................... 103
Power switch......................... 332
Regenerative braking.............. 92
Starting the hybrid system .... 332
Vehicle proximity notification system ................ 91
Hybrid System Indicator ......... 218
Hybrid transmission ................ 338 I/M test ...................................... 579
Identification ............................ 717
Engine .................................. 718
Vehicle .................................. 717
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 ... 651
Starting the hybrid system .... 332
Illuminated entry system ........ 526
Immobilizer system ................... 81
Indicators ................................. 196
Initialization.............................. 750 Intelligent Clearance
Sonar.................................. 448
Items to initialize ................... 750
Maintenance data ................. 574
Power windows..................... 309
S-APGS (Simple Advanced Parking Guidance
System) .............................. 475
Tire pressure warning system .......... ...................... 602
Inside rear view mirror ............ 304
Instrument cluster light
control .................................... 190
Intelligent Clearance Sonar .... 439
Interior lights ........................... 524
Switch ........................... 525, 526
Wattage ................................ 724
Intuitive parking assist ........... 429I
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.

781Alphabetical index
PRIUS PRIME_OM_OM47D13U_(U)
Main display ............................. 204
MaintenanceDo-it-yourself maintenance ... 580
General maintenance ........... 576
Maintenance data ................. 716
Maintenance requirements ... 573
Malfunction indicator lamp ..... 660
Master warning light................ 670
Meter ......................................... 188 Clock adjustment .................. 193
Combination meter ............... 188
Head-up display .................... 246
Indicators .............................. 199
Instrument cluster light control................................. 190
Main display .......................... 204
Multi-information display ....... 213
Warning lights ....................... 197
Warning messages ............... 670
Microphone
*.............................. 75
Mirrors Inside rear view mirror .......... 304
Outside rear view mirror defoggers ................... 500, 511
Outside rear view mirrors...... 306
Vanity mirrors........................ 539
MP3 disc
*
Multi-information display ........ 213
Air conditioning system settings screen ................... 234
Audio system-linked display ................................ 233
BSM (Blind Spot Monitor) ..... 417
Display contents ................... 213
Drive information................... 215
Driving assist system
information.......................... 238
Dynamic radar cruise control with full-speed range .......... 399 Energy monitor ..................... 216
Intelligent Clearance
Sonar.................................. 444
Intuitive parking assist .......... 430
Language.............................. 241
LDA (Lane Departure Alert with steering control) .......... 393
Navigation system-linked
display ................................ 233
Pre-collision warning ............ 377
S-APGS (Simple Advanced Parking Guidance
System) .............................. 455
Settings................................. 239
Warning message................. 238
Navigation system
*
Noise from under vehicle ........... 8
Odometer ................................. 206
Oil Engine oil .............................. 720
Opener Back door ............................. 281
Fuel filler door ....................... 366
Garage door ......................... 553
Hood ..................................... 583
Outside rear view mirrors ....... 306
Adjustment............................ 306
Blind Spot Monitor ................ 417
Folding .................................. 306
Outside rear view mirror defoggers ................... 500, 511
Outside temperature
display.................................... 204
Overhead console ................... 531
Overheating ............................. 707
M
N
O
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.