2023 TOYOTA PRIUS PRIME air conditioning

5638-2. Steps to take in an emergency
8
When trouble arises
passenger that his or her seat belt is not fastened. If the seat belt is
unfastened, the buzzer sounds intermitte ntly for a certain period of time,
after the seat belt is fastened and unfastened and the vehicle reaches a
certain speed.
■Warning buzzer
In some cases, the buzzer may not
be heard because of noisy place or
an audio sound.
■Front passenger detection sen-
sor, seat belt reminder and
warning buzzer
●If luggage is placed on the front
passenger seat, the front passen-
ger detection sensor may cause
the warning light to flash and the
warning buzzer to sound even if a
passenger is not sitting in the
seat.
●If a cushion is placed on the seat,
the sensor may not detect a pas-
senger, and the warning light may
not operate properly.
■If the malfunction indicator
lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fu el tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several
driving trips.
If the light does not go off even after
several trips, contact your Toyota
dealer as soon as possible.
■Electric power steering system
warning light (warning buzzer)
When the 12-volt battery charge
becomes insufficient or the voltage
temporarily drops, the electric power
steering system warning light may
come on and the warning buzzer
may sound.
At this time, the functions of the air
conditioning, etc. may be partially
limited in order to reduce the power consumption of the 12-volt battery.
■When the tire pressure warning
light comes on
Inspect the tires to check if a tire is
punctured.
If a tire is punctured: P.574
If none of the tires are punctured:
Turn the power switch off then turn it
to ON.
Check if the tire pressure warning
light comes on or blinks.
If the tire pressure warning light
blinks for approximately 1 minute
then stays on
There may be a malfunction in the
tire pressure wa rning system. Have
the vehicle inspected by your
Toyota dealer immediately.
If the tire pressure warning light
comes on
After the temperature of the tires
has lowered sufficiently, check the
inflation pressure of each tire and
adjust them to th e specified level.
If the warning light does not turn off
even after several minutes have
elapsed, check that the inflation
pressure of each tire is at the speci-
fied level and perform the tire infla-
tion pressure setting procedure.
(  P.524)
If the warning light does not turn off
even after several minutes have
elapsed since performing the tire
inflation pressure setting proce-
dure, have the vehicle inspected by
your Toyota dealer as soon as pos-
sible.

5688-2. Steps to take in an emergency
To prevent the shift lever from being
operated incorrectly or the vehicle
from moving unexpectedly, a mes-
sage that requires shifting the shift
position may be displayed on the
multi-information display.
In that case, follow the instruction of
the message and shift the shift posi-
tion.
●If a message or image about an
open/close state of a part or
replenishment of a consumable is
shown
Confirm the part indicated by the
multi-information di splay or a warn-
ing light, and then perform the cop-
ing method such as closing the
open door or replenishing a con-
sumable.
■If a message that indicates the
need for visiting your Toyota
dealer is displayed
The system or part shown on the
multi-information di splay is malfunc-
tioning. Have the vehicle inspected
by your Toyota dealer immediately.
■If a message that indicates the
need for referring to Owner’s
Manual is displayed
●If “Engine Coolant Temp High” is
shown, follow the instructions,
accordingly. ( P.594)
●If the following messages are
shown, there may be a malfunc-
tion. Immediately have the vehi-
cle inspected by your Toyota
dealer.
• “Plug-in Charging System Mal-
function”
• “Hybrid System Malfunction”
• “Check Engine”
• “Traction battery system malfunc- tion”
• “Accelerator System Malfunction”
• “Smart Key System malfunction”
• “Shift System Malfunction Apply Parking Brake Se curely When
Parking See Owner’s Manual” • “P Switch Malfunction Apply Park-
ing Brake Securely When Parking
See Owner’s Manual”
• “Shift System Unavailable Apply Parking Brake Securely When
Parking See Owner’s Manual”
• “Shift System Malfunction See Owner’s Manual”
• “Shift System Malfunction Stop in
a Safe Place See Owner’s Man-
ual”
• “Battery Low Shifting Unavailable
See Owner’s Manual”
●If the following messages are
shown, there may be a malfunc-
tion. Immediately stop the vehicle
in a safe place and contact your
Toyota dealer. Continuing to drive
the vehicle may be dangerous.
• “Oil pressure low”
• “Braking Power Low”
●If any of the following messages
are shown on the multi-informa-
tion display, the vehicle may have
run out of fuel. Stop the vehicle in
a safe place and, if the fuel level is
low, refuel the vehicle.
• “Hybrid system stopped”
• “Engine stopped No Fuel”
●If “12-Volt Battery Charging Sys-
tem Malfunction Stop in a Safe
Place See Owner’s Manual” is
shown
Indicates a malfunction in the vehi-
cle’s charging system. Pull over and
stop the vehicle as soon as it is safe
to do so.
While the message is displayed, the
functions of the air conditioning, etc.
may be partially lim ited in order to
reduce the power consumption of
the 12-volt battery.
■If “Traction battery needs to be
protected. Refrain from the use
of N position.” is shown
This message may be displayed
when the shift position is in N.
As the hybrid battery (traction bat-
tery) can not be charged when the

5708-2. Steps to take in an emergency
●Intuitive Parking Assist
● PKSB (Parking Support
Brake) (if equipped)
● RCD (Rear Camera Detec-
tion) (if equipped)
Have the vehicle inspected by your
Toyota dealer immediately.
■If “System Stopped See
Owner’s Manual” is displayed
Indicates one of the following sys-
tems is disabled.
●PCS (Pre-Collision System)
●LDA (Lane Departure Alert)
●LTA (Lane Tracing Assist)
● LCA (Lane Change Assist) (if
equipped)
●AHB (Automatic High Beam)
●Dynamic radar cruise control
● RSA (Road Sign Assist) (if
equipped)
●PDA (Proactive Driving Assist)
● BSM (Blind Spot Monitor) (if
equipped)
● RCTA (Rear Cross Traffic
Alert) (if equipped)
●Safe Exit Assist (if equipped)
●Intuitive Parking Assist
● PKSB (Parking Support
Brake) (if equipped)
● RCD (Rear Camera Detec-
tion) (if equipped)
Follow the following correction
methods.
• Check the voltage of the 12-volt battery
• Check the sensors that the Toyota Safety Sense 3.0 uses for foreign
matter covering them. Remove them if any. (
P.285)
• Vehicles with RCD (Rear Camera Detection): Check if the back door
is open.
Indicates the sensors may not be
operating properly. ( P.289, 358,
362, 366, 376, 380)
• Check the rear bumper around the sensors used by the BSM (if
equipped), RCTA (if equipped) or
Safe Exit Assist (if equipped) for
foreign matter co vering them.
Remove them if any. ( P.355)
• Check the sensors including cam-
era sensors used by the Intuitive
parking assist, or PKSB (if
equipped), or RCD (if equipped)
for foreign matter covering them.
Remove them if any. ( P.342)
• When problems are solved and
the sensors are operational, this
indication may disappear by itself.
■If “System Stopped Front Cam-
era Low Visibility See Owner’s
Manual” is displayed
Indicates one of the following sys-
tems is disabled.
●PCS (Pre-Collision System)
●LDA (Lane Departure Alert)
●LTA (Lane Tracing Assist)
● LCA (Lane Change Assist) (if
equipped)
●AHB (Automatic High Beam)
●Dynamic radar cruise control
● RSA (Road Sign Assist) (if
equipped)
●PDA (Proactive Driving Assist)
Follow the following correction
methods.
• Using the windshield wipers, remove the dirt or foreign matter
from the windshield.
• Using the air conditioning system,
defog the windshield.
• Close the hood, remove any stick- ers, etc. to clear the obstruction in

5718-2. Steps to take in an emergency
8
When trouble arises
front of the front camera.
■If “System Stopped Front Cam-
era Out of Temperature Range
Wait until Normal Tempera-
ture” is displayed
Indicates one of the following sys-
tems is disabled.
●PCS (Pre-Collision System)
●LDA (Lane Departure Alert)
●LTA (Lane Tracing Assist)
● LCA (Lane Change Assist) (if
equipped)
●AHB (Automatic High Beam)
●Dynamic radar cruise control
● RSA (Road Sign Assist) (if
equipped)
●PDA (Proactive Driving Assist)
Follow the following correction
methods.
• If the front camera is hot, such as
after the vehicle is parked in the
sun, use the air conditioning sys-
tem to decrease the temperature
around the front camera
• If a sunshade was used when the vehicle was parked, depending on
its type, the sunlight reflected from
the surface of the sunshade may
cause the temperature of the front
camera to become excessively
high
• If the front camera is cold, such
after the vehicle is parked in an
extremely cold environment, use
the air conditioning system to
increase the temperature around
the front camera
■If “System Stopped Front Radar
Sensor Blocked Clean Radar
Sensor” is displayed
Indicates one of the following sys-
tems is disabled.
●PCS (Pre-Collision System)
●LDA (Lane Departure Alert)
●LTA (Lane Tracing Assist)
● LCA (Lane Change Assist) (if
equipped)
●AHB (Automatic High Beam)
●Dynamic radar cruise control
●PDA (Proactive Driving Assist)
Follow the following correction
methods.
• Check if there is any foreign mat- ter attached to the radar sensor or
radar sensor cover and clean
them if necessary ( P.286)
• This message may be displayed when driving in an open area with
few nearby vehicles or structures,
such as a desert, grasslands, sub-
urbs, etc.
The message may be cleared by
driving the vehicle in an area with
structures, vehicles, etc. nearby.
■If “System Stopped Front Radar
Sensor Out of Temperature
Range Wait until Normal Tem-
perature” is displayed
Indicates one of the following sys-
tems is disabled.
●PCS (Pre-Collision System)
●LDA (Lane Departure Alert)
●LTA (Lane Tracing Assist)
● LCA (Lane Change Assist) (if
equipped)
●AHB (Automatic High Beam)
●Dynamic radar cruise control
●PDA (Proactive Driving Assist)
The temperature of the radar sensor
is outside of the operating range.
Wait for the temperature to become
appropriate.
■If “System Stopped Front Radar
In Self Calibration See Owner’s
Manual” is displayed
Indicates one of the following sys-
tems is disabled.
●PCS (Pre-Collision System)

5958-2. Steps to take in an emergency
8
When trouble arises
5Add coolant if necessary.
Water can be used in an emer-
gency if engine coolant is unavail-
able.
If water was added in an emer-
gency, have the vehicle inspected
at your Toyota dealer as soon as
possible.
6Start the hybrid system and
turn the air conditioning sys-
tem on to check that the radi-
ator cooling fan operates and
to check for coolant leaks
from the radiator or hoses.
The fan operates when the air con-
ditioning system is turned on imme-
diately after a cold start. Confirm
that the fan is operating by check-
ing the fan sound and air flow. If it is
difficult to check these, turn the air
conditioning system on and off
repeatedly. (The fan may not oper-
ate in freezing temperatures.)
7If the fan is not operating:
Stop the hybrid system
immediately and contact your
Toyota dealer.
If the fan is operating:
Have the vehicle inspected at
the nearest Toyota dealer.
8 Check if “Engine Coolant
Temp High Stop in a Safe
Place See Owner’s Manual” is shown on the multi-infor-
mation display.
If the message does not disappear:
Stop the hybrid system and contact
your Toyota dealer.
If the message is not displayed:
Have the vehicle inspected at the
nearest Toyota dealer.
■If “Hybrid System Over-
heated Output Power
Reduced” is shown on the
multi-information display
1 Stop the vehicle in a safe
place.
2 Stop the hybrid system and
carefully lift the hood.
3 After the hybrid system has
cooled down, inspect the
hoses and radiator core (radi-
ator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
4The coolant level is satisfac-
tory if it is between the “MAX”
A
B

6329-2. Customization
*: If equipped
■Driving mode select switch (P.422)
■Automatic air conditioning system ( P.434)
*: This setting changes in accordance with My Settings.
■Illumination ( P.446)
Rear accessory settingOff
3.9 in. (10 cm)
O7.9 in. (20 cm)
11.8 in. (30 cm)
15.7 in. (40 cm)
Clear registered parking
space--O
FunctionDefault settingCustomized
setting
Powertrain control in cus-
tom modeNormalSportOEco
Steering wheel control in
custom modeNormalSportO
Air conditioning operation
in custom modeNormalEcoO
FunctionDefault settingCustomized setting
A/C auto switch operation*OnOffOO
FunctionDefault settingCustomized setting
Time elapsed before the
interior lights turn off
*115 seconds
Off
OO7.5 seconds
30 seconds
Operation after the power
switch is turned offOnOffO
FunctionDefault settingCustomized settingABC
ABC
ABC
ABC

650Alphabetical Index
Alphabetical Index
A
A/C ........................................... 434“My Room Mode” ................. 134
Air conditioning eco mode .... 437
Air conditioning filter ............. 535
Automatic air conditioning sys-tem ..................................... 434
Humidity sensor ................... 439
ABS (Anti-lock Brake System) ............................................... 424Function ............................... 424
Warning light ........................ 557
ACA (Active Cornering Assist) ............................................... 424
AC charging cable .................... 97 CCID (Charging Ci rcuit Interrupt-
ing Device) indicator............. 99
CCID (Charging Ci rcuit Interrupt-
ing Device) ........................... 98
Charging cable indicator ...... 118
If the charging connector cannot be unlocked ........................ 104
Locking and unlocking.......... 102
Maintenance......................... 101
Safety functions...................... 99
Acoustic Vehicle Alerting Sys- tem ........................................... 81
Active Cornering Assist (ACA) ............................................... 424
AHB (Automatic High Beam) . 272
Airbags ...................................... 35 Airbag operating conditions.... 37
Airbag precautions for your child............................................. 40
Airbag warning light.............. 557
Correct driving posture ........... 29
Curtain shield airbag operating conditions ............................. 38
Curtain shield airbag precautions ............................................. 40
Front passenger occupant clas- sification system ...................44
General airbag precautions ....40
Location of the SRS airbags...35
Locations of airbags ...............35
Modification and disposal of air- bags......................................42
Seat cushion airbag................35
Side airbag operating conditions .............................................38
Side airbag precautions..........40
Side and curtain shield airbags operating conditions .............38
Side and curtain shield airbags precautions ...........................40
SRS airbags ...........................35
SRS warning light .................557
Air conditioning filter .............535
Air conditioning system.........434 “My Room Mode” ..................134
Air conditioning eco mode ....437
Air conditioning filter .............535
Automatic air conditioning sys-tem .....................................434
Humidity sensor....................439
Alarm Warning buzzer .. ..................555
Anchor brackets .................53, 62
Antenna Smart key system .................203
Anti-lock brake system (ABS)424 Function................................424
Warning light ........................557
Armrest ......... ......................... ..465
Assist grips .............................466
AUTO EV/HV mode ...................73
AUTO EV/HV mode switch .......74
Automatic air conditioning sys- tem .........................................434“My Room Mode” ..................134
Air conditioning eco mode ....437
Air conditioning filter .............535
Humidity sensor....................439

Alphabetical Index655
Fuel .......................................... 279Capacity ............................... 601
Fuel gauge ........................... 155
Information ........................... 607
Refueling .............................. 279
Type ............................. 601, 607
Warning light ........................ 562
Fuel filler door ..... ................... 280
Opener switch ...................... 280
Refueling .............................. 279
Fuel gauge .............................. 155
Fuses ....................................... 540
G
Garage door opener ............... 477
Gauges .................................... 155
Glove box ................................ 451
H
Headlights ............................... 269 AHB (Automatic High Beam) 272
Headlight aim ....................... 542
Replacing exterior lights ....... 543
Switch................................... 269
Headlights aim ........................ 542
Head restraints ....................... 212
Heated steering wheel ........... 443
Heaters Automatic air conditioning sys-tem ..................................... 434
Heated steering wheel ......... 443
Hybrid battery (traction battery) ........................................... 108
Outside rear view mirrors ..... 436
Seat heaters ......................... 443
High mounted stoplight Replacing exterior lights ....... 543
High voltage components ....... 83
Hill-start assist control .......... 424
Hood ........................................ 501
Hooks Cargo hooks .........................454
Retaining hooks (floor mat) ....28
Horn .........................................215
HV mode ....................................73
Hybrid battery (traction battery) .................................................83Charging ...............................116
Location ..................................83
Specification .........................602
Hybrid battery (traction battery) charge mode ...........................75
Hybrid system ...........................72 ACC ......................................254
Acoustic Vehicle Alerting System.............................................81
Brake Override System ........240
Drive-Start Control (DSC) .....245
Emergency shut off system ....87
Energy monitor/consumption screen.................................173
High voltage components .......83
How to start the hybrid system ...........................................251
Hybrid System Indicator .......155
If the hybrid system will not start ...........................................584
If your vehicle has to be stopped in an emergency .................547
Ignition switch (power switch) ...........................................251
Overheating ..........................594
Plug-in Hybrid Electric Vehicle driving tips ............................88
Plug-in hybrid system precau- tions ......................................83
Power (ignition) switch .........251
Regenerative braking .............78
Starting the hybrid system ....251
Hybrid System Indicator ........155
I
I/M test .....................................498