2018 TOYOTA PRIUS engine overheat

17Pictorial index
PRIUS_OM_OM47B89U_(U)Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 260
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . P. 418
Precautions against car wash (vehicles with rain-sensing
windshield wipers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 584
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 268
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 268
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 747
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 618
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . P. 752
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 418
Checking/rotation/tire pressure warning system . . . . . . . . . P. 618
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . P. 691, 705
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 601
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 601
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 748
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 735
Headlights/daytime running lights . . . . . . . . . . . . . . . . . . . . P. 248
Parking lights
*1/side marker lights/
LED accent lights
*2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 248
Fog lights
*2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
Turn signal lights/parking lights
*1. . . . . . . . . . . . . . . . P. 246, 248
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 246
Tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 248
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 248
Back-up lights
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 240
4
5
6
7
Light bulbs of the exter ior lights for driving
(Replacing method: P. 654, Watts: P. 754)
*1: The location of the parking lights may differ depending on the grade, etc.
*2: If equipped
8
9
10
11
12
13
14
15

106
PRIUS_OM_OM47B89U_(U)
2. Instrument cluster
■BSM (Blind Spot Monitor) outsid e rear view mirror indicators
(if equipped) ( →P. 326)
• 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 view mirror indi-
cators will turn off after a few seconds.
If the BSM outside rear view mirror indicators do not illuminate or do not
turn off, there may be a malfunction in the system.
If this occurs, have the vehicle inspected by your Toyota dealer.
●
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 light 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 r\
esult
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. 735)

218
PRIUS_OM_OM47B89U_(U)
4-1. Before 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. 241)
● 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 speed limit per-
mits it, do not drive over 85 mph (140 km/h) unless your vehicle has h\
igh-
speed capability tires. Driving over 85 mph (140 km/h) may result 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 capability
tires or not before driving at such speeds.
■ When driving on slippery road surfaces
● Sudden braking, acceleration and steering may cause tire slippage 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 side are wet
and not functioning properly, steering control may be affected.

220
PRIUS_OM_OM47B89U_(U)
4-1. Before driving
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■If you hear a squealing or scrapi ng 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” indicator is
illuminated, and apply the parking brake as necessary.
● If the vehicle is stopped on an incline, in order to prevent accidents 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 may cause
the exhaust system to overheat, which could result in a fire if combusti\
ble
material is nearby.

7388-2. Steps to take in an emergency
PRIUS_OM_OM47B89U_(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 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.
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 hood 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. 108) on the main display and the
“READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally start, or the cooling fans 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 reservoir caps while the hybrid system and radi-
ator are hot.
High temperature steam or coolant could spray out.
6

807Alphabetical index
PRIUS_OM_OM47B89U_(U)
EngineAccessory mode ................... 233
Compartment ........................ 604
Engine switch........................ 231
Exhaust gas precautions ........ 56
Hood ..................................... 601
How to start the hybrid system ......... ....................... 231
Identification number ............ 746
If the hybrid system will not start .............................. 724
If your vehicle has to be stopped in an
emergency.......................... 665
Ignition switch (power switch) .................... 231
Overheating .......................... 735
Power switch......................... 231
Engine coolant Capacity ................................ 750
Checking ............................... 608
Preparing and checking before winter....................... 418
Engine oil Capacity ................................ 748
Checking ............................... 605
Oil pressure warning light ..... 673
Preparing and checking before winter....................... 418
Engine switch .......................... 231
Auto power off function ......... 233
Changing the power switch modes...................... 233
If your vehicle has to be stopped in an
emergency.......................... 665
Starting the hybrid system .... 231 EPS
(Electronic Power Steering)
Function ................................ 408
Warning light......................... 674
EV indicator ............................. 119
EV drive mode ......................... 237
Event data recorder (EDR) ........................................ 11
Exhaust gas precautions .......... 56
Flat tire ..................................... 691
Floor mats .................................. 26
Fluid Brake .................................... 751
Transmission ........................ 751
Washer ................................. 616
Fog lights Replacing light bulbs ............ 660
Switch ................................... 258
Footwell lights ......................... 538
Front doors .............................. 171
Front fog lights Replacing light bulbs ............ 660
Switch ................................... 258
Front passenger occupant classification system .............. 50
Front passenger’s seat belt reminder light................. 675
Front seats ............................... 190
Adjustment............................ 190
Cleaning ............................... 588
Correct driving posture ........... 28
Head restraints ..................... 195
Seat heaters ......................... 536
Front side marker lights
Light switch ........................... 248
Replacing light bulbs ............ 660
F

811Alphabetical index
PRIUS_OM_OM47B89U_(U)
Multi-information displayAir conditioning system
settings screen ................... 134
Audio system-linked display ................................ 133
BSM (Blind Spot Monitor) ..... 326
Display contents ................... 114
Drive information................... 116
Driving assist system information.......................... 138
Dynamic radar cruise control
with full-speed range .......... 304
Energy monitor ..................... 117
Language .............................. 142
LDA (Lane Departure Alert with steering control) .......... 298
Navigation system-linked
display ................................ 133
Parking assist system ... 340, 367
Pre-collision warning............. 281
Settings display..................... 139
Warning message display..... 138
Navigation system
*
Noise from under vehicle............ 8
Odometer.................................. 109
Oil Engine oil .............................. 748
Opener Fuel filler door ....................... 270
Hood ..................................... 601
Outside rear view mirrors ....... 202 Adjustment ............................ 202
Blind Spot Monitor ................ 326
Folding .................................. 202
Outside rear view mirror
defoggers ................... 520, 530 Outside temperature
display.................................... 108
Overhead console ................... 545
Overheating ............................. 735
Overheating, Engine ............... 735
P position switch ..................... 241
Panic mode .............................. 167
Parking assist sensors Intelligent Clearance
Sonar.................................. 350
Intuitive parking assist .......... 339
S-APGS (Simple Advanced Parking Guidance
System) .............................. 363
Parking brake
Operation .............................. 247
Parking brake engaged warning buzzer ................... 247
Parking lights Light switch ........................... 248
Replacing light bulbs .... 656, 660
Wattage ................................ 754
Parking lock ............................. 241
PCS (Pre-Collision System) Enabling/disabling the
system .......... ...................... 285
Function ................................ 281
Warning light......................... 674
Personal lights......................... 538 Switch ................................... 539
Wattage ................................ 754
Power control unit coolant Capacity................................ 750
Checking............................... 608
Preparing and checking before winter ...................... 418
Radiator ................................ 610
N
O
P
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.