Page 6 of 588

TABLE OF CONTENTS6
PRIUS c_U (OM52F96U)8-1. Essential information
Emergency flashers .......... 462
If your vehicle has to be stopped in an
emergency ...................... 463
8-2. Steps to take in an emergency
If your vehicle needs to be towed ......................... 465
If you think something is wrong .............................. 472
If a warning light turns on or a warning buzzer
sounds ............................ 473
If a warning message is displayed ......................... 482
If you have a flat tire .......... 497
If the hybrid system will not start ........................... 508
If the shift lever cannot be shifted from P ............. 510
If the electronic key does not operate properly
(vehicles with a smart
key system) ..................... 511
If the vehicle 12-volt battery is discharged ....... 513
If your vehicle overheats ........................ 518
If the vehicle becomes stuck................................ 522 9-1. Specifications
Maintenance data (fuel, oil level, etc.) .......... 526
Fuel information ................. 535
Tire information.................. 538
9-2. Customization Customizable features ....... 550
Items to initialize ................ 555
8When trouble arises9Vehicle specifications
Page 9 of 588

9
PRIUS c_U (OM52F96U)The installation of a mobile two-way radio system in your vehicle could affect
electronic systems such as:
●
Multiport fuel injection system/sequential multiport fuel injection system
● Cruise control system
● Anti-lock brake system
● SRS airbag system
● Seat belt pretensioner system
Be sure to check with your Toyota dealer for precautionary measures or spe-
cial instructions regarding installation of a mobile two-way radio system.
High voltage parts and cables on the hybrid vehicles emit approximately the
same amount of electromagnetic waves as the conventional gasoline pow-
ered vehicles or home electronic appliances despite of their electromagnetic
shielding.
Unwanted noise may occur in the reception of the mobile two-way radio.
Your Toyota is equipped with several sophisticated computers that will record
certain data, such as: • Engine speed
• Electric motor speed (traction motor speed)
• Accelerator status
• Brake status
• Vehicle speed
• Shift position
• Hybrid battery (traction battery) status
The recorded data varies according to the vehicle grade level and options
with which it is equipped. Furthermore, these computers do not record con-
versations, sounds or images of the inside of the vehicle.
●Data usage
Toyota may use the data recorded in these computers to diagnose malfunc-
tions, conduct research and development, and improve quality.
Toyota will not disclose the recorded data to a third party except:
• With the consent of the vehicle owner or with the consent of the lessee if the vehicle is leased
• In response to an official request by the police, a court of law or a govern- ment agency
• For use by Toyota in a law suit
• For research purposes where the data is not tied to a specific vehicle or vehicle owner
Installation of a mobile two-way radio system
Vehicle data recordings
Page 72 of 588

721-2. Hybrid system
PRIUS c_U (OM52F96U)
◆When stopped/during start off
The gasoline engine stops* when the vehicle is stopped. During
start-off, the electric motor (traction motor) drives the vehicle. At
slow speeds or when traveling down a gentle slope, the engine is
stopped* and the motor is used.
When the shift lever is in N, the hybrid battery (traction battery) is
not being charged.
*When the hybrid battery (traction battery) requires charging or the engine
is warming up, etc., the gasoline engine will not automatically stop.
( P. 7 3 )
◆During normal driving
The gasoline engine is predominantly used. The electric motor
(traction motor) charges the hy brid battery as necessary.
◆When accelerating sharply
The power of the hybrid battery (traction battery) is added to that of
the gasoline engine via the electric motor (traction motor).
◆When braking (regenerative braking)
The wheels operate the electric motor (traction motor) as a power
generator, and the hybrid battery (traction battery) is charged.
When the gasoline engine is off while driving, a sound is produced to
warn pedestrians, people riding bi cycles or other people and vehicles
in the surrounding area that the vehicle is approaching. The pitch of
the sound adjusts according to vehicle speed. When vehicle speed is
approximately 16 mph (25 km/h) or more, the warning system turns
off.
Vehicle Proximity Notification System
Page 73 of 588

731-2. Hybrid system
1
For safety and security
PRIUS c_U (OM52F96U)
■Regenerative braking
In the following situations, kinetic energy is converted to electric energy and
deceleration force can be obtained in conjunction with the recharging of the
hybrid battery (traction battery).
●The accelerator pedal is released with the shift lever in D or B.
● The brake pedal is depressed with the shift lever in D or B.
■ EV drive indicator lamp
■ Conditions in which the gasoline engine may not stop
The gasoline engine starts and stops automatically. However, it may not stop
automatically in the following conditions:
●During gasoline engine warm-up
● During hybrid battery (traction battery) charging
● When the temperature of the hybrid battery (traction battery) is high or low
● When the heater is switched on
The EV drive indicator lamp comes on
when the vehicle is driven using only the
electric motor (traction motor) or the gas-
oline engine is stopped.
Displayed when “ECO Score” or the
basic display of “ECO Savings” is
selected. (
P. 98)
Page 74 of 588
741-2. Hybrid system
PRIUS c_U (OM52F96U)■
Charging the hybrid battery (traction battery)
As the gasoline engine charges the hybrid battery (traction battery), the bat-
tery does not need to be charged from an outside source. However, if the
vehicle is left parked for a long time the hybrid battery (traction battery) will
slowly discharge. For this reason, be sure to drive the vehicle at least once
every few months for at least 30 minutes or 10 miles (16 km). If the hybrid
battery (traction battery) becomes fully discharged and you are unable to start
the hybrid system, contact your Toyota dealer.
■ Charging the 12-volt battery
P. 515
■ After the 12-volt battery has dischar ged or when the terminal has been
removed and installed during exchange, etc.
The gasoline engine may not stop even if the vehicle is being driven by the
hybrid battery (traction battery). If this continues for a few days, contact your
Toyota dealer.
Page 75 of 588

751-2. Hybrid system
1
For safety and security
PRIUS c_U (OM52F96U)■
Sounds and vibrations specific to a hybrid vehicle
There may be no engine sound or vibration even though the vehicle is able to
move with the “READY” indicator is illuminated. For safety, apply the parking
brake and make sure to shift the shift lever to P when parked.
The following sounds or vibrations may occur when the hybrid system is
operating and are not a malfunction:
●Motor sounds may be heard from the engine compartment.
● Sounds may be heard from the hybrid battery (traction battery) under t\
he
rear seats when the hybrid system starts or stops.
● Relay operating sounds such as a snap or soft clank will be emitted from the
hybrid battery (traction battery), under the rear seats, when the hybrid sys-
tem is started or stopped.
● Sounds from the hybrid system may be heard when the back door is open.
● Sounds may be heard from the transmission when the gasoline engine
starts or stops, when driving at low speeds, or during idling.
● Engine sounds may be heard when accelerating sharply.
● Sounds may be heard due to regenerative braking when the brake pedal is
depressed or as the accelerator pedal is released.
● Vibration may be felt when the gasoline engine starts or stops.
● Cooling fan sounds may be heard from the air intake vent on the side of the
lower part of the rear left seat.
■ Vehicle Proximity Notification System
In the following cases, the Vehicle Proximity Notification System sound may
be difficult for pedestrians, people ridi ng bicycles or other people and vehicles
in the surrounding area to hear:
● When there is a lot of noise in the vicinity
● When it is raining or during strong winds
● When in the area surrounding the rear of the vehicle, rather than in front of
the vehicle
■ Maintenance, repair, recycling, and disposal
Contact your Toyota dealer regarding maintenance, repair, recycling and dis-
posal. Do not dispose of the vehicle yourself.
■ Customization that can be co nfigured at Toyota dealer
Settings (e. g. the volume of Vehicle Proximity Notification System sound)
can be changed. (Customizable features: P. 550)
Page 76 of 588
761-2. Hybrid system
PRIUS c_U (OM52F96U)
The illustration is an example for explanation and may differ from the
actual item.
Hybrid system precautions
Take care when handling the hybrid system, as it is a high volt-
age system (about 520 V at maximum) as well as contains parts
that become extremely hot when the hybrid system is operating.
Obey the warning labels attached to the vehicle.
Warning label
Service plug
Air conditioning compressor
Electric motor (traction motor)Power control unit with DC/DC
converter
Hybrid battery (traction bat-
tery)
High voltage cables (orange)1
2
3
4
5
6
7
Page 77 of 588

771-2. Hybrid system
1
For safety and security
PRIUS c_U (OM52F96U)
There is an air intake vent on the
side of the lower part of the rear
left seat for the purpose of cooling
the hybrid battery (traction bat-
tery). If the vent becomes
blocked, the hybrid battery may
overheat, leading to a reduction in
hybrid battery output.
When a certain level of impact is detected by the impact sensor, the
emergency shut off system blocks the high voltage current and stops
the fuel pump to minimize the risk of electrocution and fuel leakage. If
the emergency shut off system activates, your vehicle will not restart.
To restart the hybrid system, contact your Toyota dealer.
A message is automatically displayed when a malfunction occurs in
the hybrid system or an improper operation is attempted.
If a warning message is shown on
the multi-information display, read
the message and follow the
instructions. ( P. 482)
Hybrid battery (traction battery) air intake vent
Emergency shut off system
Hybrid warning message