engine TOYOTA PRIUS PLUG-IN HYBRID 2022 Service Manual

3335-2. Driving procedures
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
5
Driving
QWhen a message related to shift operations is displayed on the multi-
information display
When the shift position does not switch due to a mistaken opera tion, system
conditions, etc., or when the attempted shift operation is inva lid, a message
indicating the correct operation or the reason why switching ca nnot be per-
formed is shown on the multi-information display. In these case s, follow the
instructions and retry the operation.
Q Customization
Settings (e.g. reverse warning buzzer) can be changed.
(Customizable features: P. 724)
WARNING
QWhen driving on slippery road surfaces
Do not accelerate or shift the shift position suddenly.
Sudden changes in engine braking may cause the vehicle to spin or skid,
resulting in an accident.
Q Shift lever and P position switch
O Do not remove the shift lever knob or use anything but a genuine Toyota
shift lever knob. Also, do not hang anything on the shift lever .
Doing so could prevent the shift lever from returning to positi on, causing
unexpected accidents to occur when the vehicle is in motion.
O Do not press the P position switch while the vehicle is moving.
If the P position switch is pressed when driving at very low sp eeds (for
example, just before the vehicle stops), the vehicle may stop s uddenly
when the shift position switches to P, which could lead to an a ccident.
O In order to prevent the shift position from accidentally being changed, do
not touch the shift lever or P position switch when not using t hem.

4585-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)OWhen vehicle horns, vehicle detectors, motorcycle engines, air brakes of
large vehicles, the clearance sonar of other vehicles or other devices which
produce ultrasonic waves are near the vehicle
OA sensor is coated with a sheet of spray or heavy rain.
OIf objects draw too close to the sensor.
OWhen a pedestrian is wearing clothing that does not reflect ultrasonic waves
(ex. skirts with gathers or frills).
OWhen objects that are not perpendicular to the ground, not perpendicular to
the vehicle traveling direction, uneven, or waving are in the detection range.
OStrong wind is blowing
OWhen driving in inclement weather such as fog, snow or a sandstorm
OWhen an object that cannot be detected is between the vehicle and a
detected object
OIf an object such as a vehicle, motorcycle, bicycle or pedestrian cuts in front
of the vehicle or runs out from the side of the vehicle
OIf the orientation of a sensor has been changed due to a collision or other
impact
OWhen equipment that may obstruct a sensor is installed, such as a towing
eyelet, bumper protector (an additional trim strip, etc.), bicycle carrier, or
snow plow
OIf the front of the vehicle is raised or lowered due to the carried load
OIf the vehicle cannot be driven in a stable manner, such as when the vehicle
has been in an accident or is malfunctioning
OWhen tire chains, a compact spare tire or an emergency tire puncture repair
kit are used.

4595-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
5
Driving
QSituations in which the system may operate even if there is no possibil-
ity of a collision
In some situations, such as the following, the system may opera te even
though there is no possibility of a collision.
O When driving toward a banner, flag, low-hanging branch or boom barrier
(such as those used at railroad crossings, toll gates and parki ng lots)
O When there is a rut or hole in the surface of the road
O When driving on a metal cover (grating), such as those used for drainage
ditches
O When driving up or down a steep slope
O If a sensor is hit by a large amount of water, such as when driving on a
flooded road
O There is dirt, snow, water drops or ice on a sensor. (Cleaning the sensors
will resolve this problem.)
O A sensor is coated with a sheet of spray or heavy rain
O When driving in inclement weather such as fog, snow or a sandstorm
O When vehicle horns, vehicle detectors, motorcycle engines, air brakes of
large vehicles, the clearance sonar of other vehicles or other devices which
produce ultrasonic waves are near the vehicle
O If the front of the vehicle is raised or lowered due to the carried load
O If the orientation of a sensor has been changed due to a collision or other
impact
O Driving close to columns (H-shaped steel beams, etc.) in multi-story parking
garages, construction sites, etc.
O If the vehicle cannot be driven in a stable manner, such as when the vehicle
has been in an accident or is malfunctioning
O When driving on a narrow road
O When strong winds are blowing

5075-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
5
Driving
WARNING
OObserve the following precautions, as the sensors may stop functioning
properly which may lead to an accident.
• Do not subject the sensor to strong shocks by hitting it, etc. The sen-
sors may not function properly.
• When using a high-pressure washer to wash the vehicle, do not spray
water directly on the sensors. Equipment may not function prope rly if
subjected to an impact from strong water pressure. If the vehic le
bumper strikes something, equipm ent may not operate properly due to
a sensor malfunction. Have the vehicle inspected at any authori zed
Toyota retailer or Toyota author ized repairer, or any reliable repairer.
O In the following situations, the sensors may not operate normally and may
lead to an accident. Drive carefully.
• Obstacles cannot be detected in the side areas until a scan of the side
areas is completed. ( P. 456)
• Even after the scan of the side areas is completed, obstacles such as
other vehicles, people or animals that approach from the sides cannot
be detected.
• The sensor is frozen (if it thaws, the system returns to norma l).
A warning message may display at particularly low temperatures due to
the sensor freezing and it may not detect parked vehicles.
• The sensor is blocked by someone’s hand.
• The vehicle is tilted a large amount.
• The temperature is extremely hot or cold.
• The vehicle is driven on undulating roads, slopes, gravel road s, in areas
with tall grass, etc.
• An ultrasonic wave source is nearby, such as the horn or senso rs of
another vehicle, a motorcycle engine or the air brake of a larg e vehicle.
• Heavy rain or a water strikes the vehicle.
• The angle of the sensor may be deviated when assist control st arts
even if there is a parked vehicle in the target parking spot. H ave the
vehicle inspected at any authorized Toyota retailer or Toyota a uthorized
repairer, or any reliable repairer.
• Do not install any accessories within the sensor detection ran ge.

5085-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
GPF (Gasoline Par ticulate Filter) system
QIf “Exhaust Filter Full See Owner’s Manual” is shown on the multi-infor-
mation display
O The message may be displayed while high load driving with particulate mat-
ter accumulating.
O Hybrid system output (engine speed) is restricted when a certain amount of
particulate matter accumulates, however, it is possible to driv e the vehicle
unless the malfunction indicator lamp comes on.
O Particulate matter can accumulate more quickly if the vehicle is frequently
driven short trips or at low s peeds, or if the hybrid system is regularly started
in an extremely cold environment. Excessive accumulation of par ticulate
matter can be prevented by periodically driving long distances continuously
with intermittent releasing of the accelerator pedal, such as w hen driving on
highways and freeways.
Q If the malfunction indicator lamp comes on or “Exhaust Filter Full Visit
Your Dealer” is shown on the multi-information display
The amount of accumulated particulate matter has exceeded a cer tain level.
Have the vehicle inspected by any authorized Toyota retailer or Toyota autho-
rized repairer, or any reli able repairer immediately.
The GPF system collects particulate matter in the exhaust gas
by using an exhaust gas filter.
The system will operate to regenerate the filter automatically,
depending on the vehicle conditions.
NOTICE
Q To prevent the GPF system from not operating properly
O Do not use fuel other than the specified type
O Do not modify the exhaust pipes

5125-5. Using the driving support systems
Prius Plug-in Hybrid_OM_OM47E75E_(EE)QOperating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will
operate:
OThe shift position is in a position other than P or N (when starting off forward/
backward on an upward incline)
OThe vehicle is stopped
OThe accelerator pedal is not depressed
OThe parking brake is not engaged
QAutomatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
OShift the shift position to P or N
OThe accelerator pedal is depressed
OThe parking brake is engaged
ONo more than 2 seconds have elapsed after the brake pedal is released.
QSounds and vibrations caused by the ABS, brake assist, VSC, TRC and
hill-start assist control systems
OA sound may be heard from the engine compartment when the brake pedal
is depressed repeatedly, when the hybrid system is started or just after the
vehicle begins to move. This sound does not indicate that a malfunction has
occurred in any of these systems.
OAny of the following conditions may occur when the above systems are
operating. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard also after the vehicle comes to a stop.
QECB operating sound
ECB operating sound may be heard in the following cases, but it does not
indicate that a malfunction has occurred.
OOperating sound heard from the engine compartment when the brake pedal
is operated.
OMotor sound of the brake system heard from the front part of the vehicle
when the driver’s door is opened.
OOperating sound heard from the engine compartment when one or two min-
utes passed after the stop of the hybrid system.
QEPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be
heard. This does not indicate a malfunction.

5165-6. Driving tips
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
Winter driving tips
OUse fluids that are appropriate to the prevailing outside tempera-
tures.
• Engine oil
• Engine/power control unit coolant
• Washer fluid
OHave a service technician inspect the condition of the 12-volt bat-
tery.
OHave the vehicle fitted with four snow tires or purchase a set of tire
chains for the front tires.
Ensure that all tires are the same size and brand, and that chains match
the size of the tires.
Perform the following according to the driving conditions:
ODo not try to forcibly open a window or move a wiper that is frozen.
Pour warm water over the frozen area to melt the ice. Wipe away
the water immediately to prevent it from freezing.
OTo ensure proper operation of the climate control system fan,
remove any snow that has accumulated on the air inlet vents in
front of the windshield.
OCheck for and remove any excess ice or snow that may have accu-
mulated on the exterior lights, vehicle’s roof, chassis, around the
tires or on the brakes.
ORemove any snow or mud from the bottom of your shoes before
getting in the vehicle.
Carry out the necessary preparations and inspections before
driving the vehicle in winter. Always drive the vehicle in a man-
ner appropriate to the prevailing weather conditions.
Preparation for winter
Before driving the vehicle

5195-6. Driving tips
5
Driving
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
WARNING
QDriving with snow tires
Observe the following precautions to reduce the risk of acciden ts.
Failure to do so may result in a loss of vehicle control and ca use death or
serious injury.
O Use tires of the specified size.
O Maintain the recommended level of air pressure.
O Do not drive at speeds in excess of the speed limit or the speed limit spec-
ified for the snow tires being used.
O Use snow tires on all, not just some wheels.
Q Driving with tire chains
Observe the following precautions to reduce the risk of acciden ts.
Failure to do so may result in the vehicle being unable to be d riven safely,
and may cause death or serious injury.
O Do not drive in excess of the speed limit specified for the tire chains being
used, or 50 km/h (30 mph), whichever is lower.
O Avoid driving on bumpy road surfaces or over potholes.
O Avoid sudden acceleration, abrupt steering, sudden braking and shifting
operations that cause sudden engine braking.
O Slow down sufficiently before entering a curve to ensure that vehicle con-
trol is maintained.
O Do not use LTA (Lane Tracing Assist).
Q When parking the vehicle
When parking the vehicle without applying the parking brake, ma ke sure to
chock the wheels. If you do not chock the wheels, the vehicle m ay move
unexpectedly, possibly resulting in an accident.
NOTICE
Q Repairing or replacing snow tires
Request repairs or replacement of snow tires from any authorize d Toyota
retailer or Toyota authorized repairer, or any reliable repaire r or legitimate
tire retailers.
This is because the removal and attachment of snow tires affect s the opera-
tion of the tire pressure warning valves and transmitters.
Q Fitting tire chains
The tire pressure warning valves and transmitters may not funct ion correctly
when tire chains are fitted.

5296-1. Using the air conditioning system and defogger
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
6
Interior features
QHeating
O In HV mode, the gasoline engine may operate in order to extract heat from
the engine coolant via the heater.
O In EV mode, heating is done by a heat pump system.
• When the outside temperature is low or it is snowing, compared to con-
ventional vehicles, heating may be less effective and warm air may not
come out.
• If frost has formed on the outside heat exchanger, the heating perfor-
mance will decline. The frost can be removed from the outside h eat
exchanger by operating the Remote Air Conditioning System befor e driv-
ing ( P. 535). When frosted over, the heating operation of the Remote
Air Conditioning System starts after defrosting.
• When is turned on, the heating is controlled optimally. There fore,
the set heating performance may not be achieved even if the fan speed
setting is increased.
O In the following situations the gasoline engine may operate in order to
extract heat from the engine coolant via the heater even in EV mode.
• The outside temperature is approx imately -10°C (14°F) or low
• is operating
Q Using automatic mode
Fan speed is adjusted automatically according to the temperatur e setting and
the ambient conditions.
Therefore, the fan may stop for a while until warm or cool air is ready to flow
immediately after is pressed.
• When the outside heat exchanger is
frosted over, fan speed declines and it
may become harder to heat the inte-
rior. However, it is not a malfunction.
In this situation, the air temperature
from the outlets may not change even
though the set temperature is raised.Outside heat exchanger

5326-1. Using the air conditioning system and defogger
Prius Plug-in Hybrid_OM_OM47E75E_(EE)QOperation of the air conditioning system when the blower customization
is set to “ECO”
OIn the “ECO” mode, the air conditioning system is controlled as follows to
prioritize fuel efficiency:
• Engine speed and compressor operation controlled to restrict heating/
cooling capacity
• Fan speed restricted when automatic mode is selected
OTo improve air conditioning performance, perform the following operations:
• Adjust the fan speed
• Adjust the temperature setting
• Set the blower customization to “FAST” or “NORMAL” mode.
OWhen the driving mode is set to Eco driving mode, the fan speed setting
mode will be changed to “ECO” mode automatically. Even in this case, the
fan speed control mode can be changed by pressing . (P. 418)
QWhen the outside temperature falls to nearly 0C (32F)
The dehumidification function may not operate even when is pressed.
QVentilation and air conditioning odors
OTo let the fresh air in, set the air conditioning system to the outside air mode.
ODuring use, various odors from inside and outside the vehicle may enter into
and accumulate in the air conditioning system. This may then cause odor to
be emitted from the vents.
OIn order to suppress odors that occur when the air conditioning system
starts, fresh air is automatically taken in when parked.
OTo reduce potential odors from occurring, the start timing of the blower may
be delayed for a short period of time immediately after the air conditioning
system is started in automatic mode.
QAir conditioning filter
P. 624
QCustomization
Settings (e.g. A/C auto switching operation) can be changed.
(Customizable features: P. 724)