engine overheat TOYOTA PRIUS PRIME 2018 Owners Manual (in English)

17Pictorial index
PRIUS PRIME_OM_OM47C17U_(U)Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 356
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 356
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 714
Charging port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 102
Charging method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 125
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . P. 598
Replacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 613
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . P. 720
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 482
Checking/rotation/tire pressur e warning system . . . . . . . . .P. 598
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 675
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 581
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 581
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 716
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 704
Headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 338
Parking lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 338
Fog lights
* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 348
LED accent lights
*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 338
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 336
Daytime running lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 338
Side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 338
Tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 338
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 338
Back-up lights
Shifting the shift position to R . . . . . . . . . . . . . . . . . . . . . . . . . P. 330
5
6
7
8
Light bulbs of the exterior lights for driving
(Replacing method: P. 639, Watts: P. 721)
*: If equipped
9
10
11
12
13
14
15
16
17
18

96
PRIUS PRIME_OM_OM47C17U_(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. 566.
■ 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 m onths (refuel a
total of at least 5.3 gal. [20 L, 4.4 Imp.gal.] over a 12-month 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_OM47C17U_(U)
1953. Instrument cluster
3
Instrument cluster
■BSM (Blind Spot Monitor) outsid e rear view mirror indicators
(if equipped) ( P. 408)
• 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. 704)

PRIUS PRIME_OM_OM47C17U_(U)
3115-1. 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. 331)
● 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_OM47C17U_(U)
3135-1. 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.

7078-2. Steps to take in an emergency
PRIUS PRIME_OM_OM47C17U_(U)
8
When trouble arises
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. 197) 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

773Alphabetical index
PRIUS PRIME_OM_OM47C17U_(U)
Clock ......................................... 180Adjustment ............................ 185
Coat hooks ............................... 544
Combination meter .................. 180 Clock adjustment .................. 185
Main display .......................... 196
Multi-information display ....... 205
Warning lights and
indicators ............................ 188
Condenser ................................ 590
Console box ............................. 520
Consumption screen ....... 250, 256
Coolant ..................................... 588 Capacity ................................ 718
Checking ............................... 588
Preparing and checking before winter....................... 482
Cooling system ........................ 588 Engine overheating ............... 704
Hybrid system overheating ... 706
Cruise control .......................... 391 Dynamic radar cruise control with full-speed range .......... 391
Cup holders.............................. 521
Curtain shield airbags ............... 36
Customizable features ............ 736
Daytime running light system .................................... 341
Deck board ............................... 524
Defogger Outside rear view
mirrors ........................ 492, 503
Rear window ................. 492, 503
Windshield .................... 492, 502 Dimension ................................ 712
Dinghy towing.......................... 323
Display
BSM (Blind Spot Monitor) ..... 408
Drive information .................. 207
Dynamic radar cruise control with full-speed range .......... 391
Energy monitor ..... 208, 247, 253
Head-up display.................... 238
Intelligent Clearance Sonar.................................. 435
Intuitive parking assist .......... 421
LDA (Lane Departure Alert with steering control) .......... 385
Main display.......................... 196
Multi-information display ....... 205
Pre-collision warning ............ 369
S-APGS (Simple Advanced Parking Guidance
System) .............................. 446
Warning messages ............... 667
Do-it-yourself maintenance .... 578
Door courtesy lights ............... 516 Location ................................ 516
Wattage ................................ 721
Doors ................................ 267, 273 Automatic door locking
and unlocking system......... 270
Back door ............................. 273
Door glasses......................... 300
Door lock .............................. 267
Open door warning buzzer ... 659
Open door warning light ....... 659
Outside rear view mirrors ..... 298
Rear door child-protectors .... 270
Side doors ............................ 267
Side windows........................ 300
D
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.

774Alphabetical index
PRIUS PRIME_OM_OM47C17U_(U)
Drive information ..................... 207
Drive-Start Control .................. 308
Driver’s seat belt reminder light......................................... 659
Driving ...................................... 306
Break-in tips .......................... 309
Correct posture ....................... 28
Driving in the rain .................. 307
Driving mode select switch ... 406
Plug-in hybrid vehicle driving tips ........................................ 97
Procedures ........................... 306
Winter drive tips .................... 482
Dynamic radar cruise control
with full-speed range ............ 391
ECB (Electronically Controlled Brake System) .... 476
Eco drive mode ........................ 406
EDR (Event data recorder) ........ 11
Electric motor (traction motor) ....................... 78
Location .................................. 78
Specification ......................... 715
Electric Power Steering (EPS)....................................... 477
Function ................................ 477
Warning light ......................... 658
Electronic key .......................... 262
Battery-saving function ......... 280
If the electronic key does not operate properly ........... 694
Replacing the battery ............ 631
Electronically Controlled Brake System (ECB) ............. 476 Emergency, in case of
If a warning buzzer sounds... 657
If a warning light turns on ..... 657
If a warning message is displayed ............................ 667
If the 12-volt battery is discharged.......................... 698
If the electronic key does
not operate properly ........... 694
If the hybrid system will not start .............................. 692
If you have a flat tire ............. 675
If you lose your keys ..... 263, 266
If you think something is wrong .............................. 656
If your vehicle becomes stuck ................................... 709
If your vehicle has to be stopped in an emergency ... 649
If your vehicle needs to be
towed.................................. 650
If your vehicle overheats....... 704
Emergency flashers ................ 648
Emergency tire puncture
repair kit ................................. 675
Energy monitor ........ 208, 247, 253
Engine Accessory mode ................... 326
Compartment ........................ 584
Engine switch ....................... 324
Exhaust gas precautions ........ 56
Hood ..................................... 581
How to start the hybrid system .......... ...................... 324
Identification number ............ 714
If the hybrid system will not start .............................. 692
If your vehicle has to be stopped in an emergency ... 649
Ignition switch (power switch) .................... 324
Overheating .......................... 704
Power switch ........................ 324
E

779Alphabetical index
PRIUS PRIME_OM_OM47C17U_(U)
Energy monitor ..................... 208
Intelligent Clearance Sonar .................................. 435
Intuitive parking assist .......... 421
Language .............................. 233
LDA (Lane Departure Alert with steering control) .......... 385
Navigation system-linked
display ................................ 225
Pre-collision warning............. 369
S-APGS (Simple Advanced Parking Guidance
System) .............................. 446
Settings ................................. 231
Warning message ................. 230
Navigation system
*
Noise from under vehicle............ 8
Odometer.................................. 198
Oil Engine oil .............................. 716
Opener Back door.............................. 273
Fuel filler door ....................... 358
Garage door.......................... 545
Hood ..................................... 581
Outside rear view mirrors ....... 298
Adjustment ............................ 298
Blind Spot Monitor ................ 408
Folding .................................. 298
Outside rear view mirror defoggers ................... 492, 503
Outside temperature
display .................................... 196
Overhead console ................... 523
Overheating.............................. 704 P position switch ..................... 331
Panic mode .............................. 263
Parking assist sensors
Intelligent Clearance Sonar.................................. 430
Intuitive parking assist .......... 420
S-APGS (Simple Advanced Parking Guidance
System) .............................. 442
Parking brake........................... 337 Operation .............................. 337
Parking brake engaged
warning buzzer ................... 337
Parking lights........................... 338
Light switch ........................... 338
Replacing light bulbs ............ 644
Parking lock ............................. 331
PCS (Pre-Collision System).... 369
Enabling/disabling the system .......... ...................... 373
Function ................................ 369
Warning light......................... 658
Personal lights......................... 516
Switch ................................... 517
Wattage ................................ 721
Plug-in hybrid system ............... 78 Driving tips .............................. 97
EV auto mode ......................... 79
EV driving range ................... 100
EV mode ................................. 79
EV/HV mode selection
switch ................................... 82
Features ................................. 78
How to charge ...................... 136
HV mode................................. 79
Hybrid battery (traction
battery) charge mode ........... 79
N
O
P
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.