2015 TOYOTA PRIUS V engine overheat

17Pictorial index
PRIUS v_OM_OM47887U_(U)Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 200
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . P. 261
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 205
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 205
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 552
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 441
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . P. 557
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 261
Checking/rotation/tire pressure warning system . . . . . . . . . P. 441
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 518
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 419
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 419
Engine compartment cover . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 424
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 553
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 541
Headlights/parking lights/
daytime running lights
*/
side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 187
Fog lights
* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 198
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 185
Stop/tail lights
Hill-start assist control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 245
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 187
Back-up lights
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 179
4
5
6
7
Light bulbs of the exterior lights for driving
(Replacing method: P. 464, Watts: P. 558)
*: If equipped
8
9
10
11
12
13

PRIUS v_OM_OM47887U_(U)
992. Instrument cluster
2
Instrument cluster
■Remaining hybrid battery (tract ion battery) charge display
The charge amount of the hybrid battery (traction battery) is automatically
controlled by the hybrid system. For this reason, even if electricity is recov-
ered via the regenerative braking, or electricity is generated via the gasoline
engine, the displayed hybrid battery (traction battery) charge amount may not
reach the highest level (level 8). However, this does not indicate a malfunc-
tion.
■ Engine speed
On hybrid vehicles, engine speed is precisely controlled in order to help
improve fuel efficiency and reduce exhaust emissions etc.
■ Brightness of the instrument panel light
If the headlight switch is turned to ON while the surrounding area is dark, the
instrument panel lights will dim.
■ When disconnecting and reconnect ing 12-volt battery terminals
The fuel consumption display and average vehicle speed will be reset.
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. 541)
■ The trip information display at low temperatures
Allow the interior of the vehicle to warm up before using the liquid crystal
information display. At extremely low temperatures, the information display
monitor may respond slowly, and display changes may be delayed.

PRIUS v_OM_OM47887U_(U)
1594-1. Before driving
4
Driving
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When driving the vehicle
● During normal driving, do not turn off the hybrid system. Turning the hybrid
system off while driving will not cause loss of steering or braking control,
however, power assist to the steering will be lost. This will make it more
difficult to steer smoothly, so you should pull over and stop the vehicle as
soon as it is safe to do so.
In the event of an emergency, such as if it becomes impossible to stop the
vehicle in the normal way: P. 481
● 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. 180)
● 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 high-
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 y our 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.

PRIUS v_OM_OM47887U_(U)
1614-1. Before driving
4
Driving
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■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.
■ When the vehicle is parked
● Do not leave glasses, cigarette lighters, spray cans, or soft drink cans in
the vehicle when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter or spray can, and may lead to a fire.
• The temperature inside the vehicle may cause the plastic lenses and
plastic material of glasses to deform or crack.
• Soft drink cans may fracture, causing the contents to spray over the
interior of the vehicle, and may also cause a short circuit in the vehicle’s
electrical components.
● Do not leave cigarette lighters in the vehicle. If a cigarette lighter is in a
place such as the glove box or on the floor, it may be lit accidentally when
luggage is loaded or the seat is adjusted, causing a fire.
● Do not attach adhesive discs to the windshield or windows. Do not place con-
tainers such as air fresheners on the instrument panel or dashboard. Adhe-
sive discs or containers may act as lenses, causing a fire in the vehicle.
● Do not leave a door or window open if the curved glass is coated with a
metallized film such as a silver-colored one. Reflected sunlight may cause
the glass to act as a lens, causing a fire.
● Always apply the parking brake, shift the shift position to P, stop the hybrid
system and lock the vehicle.
Do not leave the vehicle unattended while the “READY” indicator is illumi-
nated.
● Do not touch the exhaust pipe while the “READY” indicator is illuminated
or immediately after turning the hybrid system off.
Doing so may cause burns.

4918-2. Steps to take in an emergency
PRIUS v_OM_OM47887U_(U)
8
When trouble arises
(Flashes)
(If equipped)
P position request indicator light (warning buzzer)
The amount of charge remaining in the hybrid battery
(traction battery) has fallen because the shift position has
been left in N for a long time
 Because recharging is not possible when the shift
position is in N, shift the shift position to P when
parking the vehicle for a long time.
• The driver’s door has been opened while the shift posi- tion is in N, D or B
• An attempt has been made to start the hybrid system while the shift position is in anything other than P
 Shift the shift position to P.
(If equipped)
Hybrid system overheat warn ing light (warning buzzer)
The hybrid system has overheated
This light may come on when driving under severe operat-
ing conditions, and the output of the hybrid system may
temporarily decrease in order to protect the system. (For
example, when driving up a long steep hill or driving up a
steep hill in reverse.)
 Stop and check. ( P. 541)
(If equipped)
Cruise control indicator (yellow indicator)
Indicates a malfunction in the cruise control
 Have the vehicle inspected by your Toyota dealer
immediately.
(Only outer frame
flashes)
(If equipped)
Low hybrid battery (tract ion battery) warning light
(warning buzzer)
Hybrid battery (traction battery) level becomes low
because the shift position is in N for long time
 Because recharging is not possible when the shift
position is in N, shift the shift position to P when
parking the vehicle for a long time.
High coolant temperat ure warning light
Changes from a flashing to a solid light when the engine
coolant temperature increases
 Stop and check. ( P. 541)
(If equipped)
Automatic headlight leveling system warning light
Indicates a malfunction in the automatic headlight leveling
system
 Have the vehicle inspected by your Toyota dealer
immediately.
Open door warning light (warning buzzer)*2
Indicates that a door is not fully closed
 Check that all the doors are closed.
Warning lightWarning light/Details/Actions

5058-2. Steps to take in an emergency
PRIUS v_OM_OM47887U_(U)
8
When trouble arises
Indicates an engine oil pressure malfunction A buzzer also sounds.
 Immediately contact your Toyota dealer.
Indicates that the hybrid system has overheated
This message may be displayed when driving
under severe operating conditions, and the out-
put of the hybrid system may temporarily
decrease in order to protect the system. (For
example, when driving up a long steep hill or
driving up a steep hill in reverse.)
A buzzer also sounds.
 Stop and check. ( P. 541)
(If equipped)
Indicates a malfunction in the Automatic High
Beam
A buzzer also sounds.
 Have the vehicle inspected by your Toyota
dealer.
Indicates that the insufficient 12-volt battery
charge
A few seconds
* after the message disap-
pears: Maintain the hybrid system opera-
tion state for approximately 15 minutes or
more to recharge the 12-volt battery.
 If the message does not disappear: Start
the hybrid system by following the “If the
12-volt battery is discharged” procedure
(P. 536).
*: This is displayed for about 6 seconds.
Warning messageDetails/Actions
(Flashes)

5448-2. Steps to take in an emergency
PRIUS v_OM_OM47887U_(U)
After stopping the hybrid system and waiting for 5 minutes or
more, start the hybrid system and check for the instrument clus-
ter or multi-information display.
If the hybrid system overheat warning light does not turn off or
the message does not disappear:
Stop the hybrid system and contact your Toyota dealer.
If the hybrid system overheat wa rning light does not come on or
the message is not displayed:
The hybrid system temperature has dropped and the vehicle may
be driven normally.
However, if the warning light comes on again frequently or the message
appears again frequently, contact your Toyota dealer.
WARNING
■ 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 indicator on the
power switch and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automati-
cally start, or the cooling fan 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 cap while the hybrid system and radia-
tor are hot.
High temperature steam or coolant could spray out.
6

606Alphabetical index
PRIUS v_OM_OM47887U_(U)
If you have a flat tire ............. 518
If you lose your keys ............. 119
If you think something is wrong .............................. 487
If your vehicle becomes
stuck ................................... 546
If your vehicle has to be stopped in an emergency ... 481
If your vehicle needs to be towed .................................. 482
If your vehicle overheats ....... 541
Energy monitor ................ 102, 108
Engine Accessory mode ................... 174
Compartment ........................ 423
Engine switch........................ 172
Exhaust gas precautions ........ 72
Hood ..................................... 419
How to start the hybrid system ......... ....................... 172
Identification number ............ 552
If the hybrid system will not start .............................. 532
If your vehicle has to be stopped in an emergency ... 481
Ignition switch (power switch) .................... 172
Overheating .......................... 541
Power switch......................... 172 Engine coolant
Capacity................................ 555
Checking............................... 429
Preparing and checking before winter ...................... 261
Engine coolant temperature warning light.......................... 491
Engine oil
Capacity................................ 553
Checking............................... 425
Oil pressure warning light ..... 488
Preparing and checking before winter ...................... 261
Engine switch .......................... 172
Auto power off function ......... 174
Changing the power switch modes ..................... 174
If your vehicle has to be stopped in an emergency ... 481
Starting the hybrid system .... 172
Engine switch light (power switch light) .............. 371
EPS
(Electronic Power Steering) Function ................................ 244
Warning light......................... 489
EV indicator ............................... 96
EV drive mode ......................... 177
Event data recorder (EDR)........ 11
Exhaust gas precautions .......... 72