2023 SUBARU SOLTERRA ECO mode

4006-1. Using the air conditioning system and defogger
Owners Manual_USA_M42C01_en
6-1.Using the air conditioning system and defogger
*: if equipped
Press the ALL AUTO (“ECO”)
switch
The indicator on the ALL AUTO
(“ECO”) switch illuminates, and the
automatic air conditioning system,
seat heaters
* and ventilators*, and
heated steering wheel
* operate in
automatic mode.
If any of the system is operated
manually, the indicator turns off.
However, all other functions con-
tinue to operate in automatic mode.
Even if ALL AUTO (“ECO”) control
is turned off, the air conditioner,
seat heater/ventilator, and steering
heater will not be turned off.
If the front window glass becomes cloudy due to a drop in the outside
air temperature while the ALL
AUTO (“ECO”) control is operating,
you can remove the cloudiness by
pressing the AUTO switch on the
air conditioner control panel.
*: If equipped
■Automatic air conditioning
system (
P.402)
The temperature can be
adjusted independently for each
seat.
■Seat heaters (if equipped)
and ventilators (if
equipped) ( P. 4 1 1 )
Heating or ventilation is auto-
matically selected according to
the set temperature of the air
conditioning system, the out-
side temperature, etc.
■Heated steering wheel (if
equipped) ( P. 4 1 1 )
Heated steering wheel operates
automatically according to the
set temperature of the air condi-
tioning system, the outside tem-
perature, etc.
■Passenger detection functions
When a passenger is detected in
the front passenger seat, the seat
heater and ventila tor will operate
automatically.
■Seat heater (if equipped)/venti-
lator (if equipped) operation
If the seat heater/ventilator switch is
set to auto, it will operate without
performing the passenger detection.
ALL AUTO (“ECO”)
control
The seat heaters*, seat ven-
tilators
* and heated steer-
ing wheel
* are each
automatically controlled
according to the set tem-
perature of the air condi-
tioning system, the outside
and cabin temperature, etc.
ALL AUTO (“ECO”) con-
trols the power consump-
tion in order to both extend
the cruising range and
maintain comfortable condi-
tions.
Turning on ALL AUTO
(“ECO”) control
Operation of each system

4026-1. Using the air conditioning system and defogger
Owners Manual_USA_M42C01_en
ALL AUTO (“ECO”) switch (P.400)
Automatic mode switch
“OFF” switch
Outside/recirculated air mode switch
“A/C” switch
Front seat concentrated airflow mode (S-FLOW) switch
Windshield wiper de-icer switch (if equipped)
“SYNC” switch
Right-hand side temperature control switch
Airflow mode control switch
Fan speed control switch
Left-hand side temperature control switch
Rear window and outside rear view mirror defogger switch
Windshield defogger switch
Automatic air conditioning system
Air outlets and fan speed are automatically adjusted accord-
ing to the temperature setting.
Air conditioning controls

4046-1. Using the air conditioning system and defogger
Owners Manual_USA_M42C01_en
When the windshield defogger
switch is on, the indicator illumi-
nates on the windshield defog-
ger switch.
■Defogging the rear window
and outside rear view mir-
rors
Defoggers are used to defog the
rear window and to remove rain-
drops, dew and frost from the
outside rear view mirrors.
Press the rear window and out-
side rear view mirror defogger
switch.
The defoggers will automati-
cally turn off after a period of
time.
■Windshield wiper de-icer (if
equipped)
This feature is used to prevent
ice from building up on the wind-
shield and wiper blades.
Press the windshield wiper de-
icer switch.
The indicator comes on when
the windshield wiper de-icer is
on.
The windshield wiper de-icer will
automatically turn off after a
period of time.
■Fogging up of the windows
●The windows will easily fog up
when the humidity in the vehicle is
high. Turning “A/C” switch on will
dehumidify the air from the outlets
and defog the windshield effec-
tively.
●If you turn “A/C” switch off, the
windows may fog up more easily.
●The windows may fog up if the
recirculated air mode is used.
■When driving on dusty roads
Close all windows. If dust thrown up
by the vehicle is still drawn into the
vehicle after closing the windows, it
is recommended that the air intake
mode be set to outside air mode and
the fan speed to a ny setting except
off.
■Outside/recirculated air mode
●Setting to the recirculated air
mode temporarily is recom-
mended in preventing dirty air
from entering the vehicle interior
and helping to c ool the vehicle
when the outside air temperature
is high.
●Outside/recirculated air mode may
automatically switch depending on
the temperature setting or the
inside temperature.
■When the outside temperature
exceeds 75°F (24°C) and the air
conditioning system is on
●In order to reduce the air condi-
tioning power consumption, the air
conditioning system may switch to

4056-1. Using the air conditioning system and defogger
Owners Manual_USA_M42C01_en
6
Interior features
recirculated air mode automati-
cally. This may also reduce elec-
tricity consumption.
●Recirculated air mode is selected
as a default mode when the power
switch is turned to ON.
●It is possible to switch to outside
air mode at any time by pressing
the outside/recirculated air mode
switch.
■When the outside temperature
falls to nearly 32°F (0°C)
The dehumidification function may
not operate even when “A/C” switch
is pressed.
■Ventilation and air conditioning
odors
●To let fresh air in, set the air condi-
tioning system to the outside air
mode.
●During use, various odors from
inside and outside the vehicle may
enter into and a ccumulate in the
air conditioning system. This may
then cause odor to be emitted
from the vents.
●To reduce potential odors from
occurring:
• It is recommended that the air
conditioning system be set to out-
side air mode prior to turning the
vehicle off.
• The start timing of the blower may
be delayed for a short period of
time immediately after the air con-
ditioning system is started in auto-
matic mode.
●When parking, the system auto-
matically switches to outside air
mode to encourage better air cir-
culation throughout the vehicle,
helping to reduce odors that occur
when starting the vehicle.
■Air conditioning filter
 P. 4 9 4
■Air conditioning system refrig-
erant
●A label regarding the refrigerant of the air conditioning system is
attached to the h
ood at the loca-
tion shown in the following illustra-
tion.
●The meaning of each symbol on
the label are as follows:
■Noise from air conditioning sys-
tem
Approximately 90 seconds after the
power switch turned to OFF, you
may hear sound coming from air
conditioning system. This is the
sound of a air conditioning system
initialize and, it d oes not indicate a
malfunction.
■Customization
Some functions can be customized.
(Customizable features: P.575)
Caution
Air conditioning system
Air conditioning system
lubricant type
Requires registered
technician to service air
conditioning system
Flammable refrigerant

4136-1. Using the air conditioning system and defogger
Owners Manual_USA_M42C01_en
6
Interior features
■The seat heaters can be used
when
The power swit ch is in ON.
Turns the seat ventilators on/off
Each time the switch is pressed,
the operation condition changes as
follows.
AUTO (lit)  Hi (3 segments lit) 
Mid (2 segments lit)  Lo (1 seg-
ment lit)  Off
The AUTO indicator and/or level
indicator illuminates during
operation.
■The seat ventilators can be
used when
The power switch is in ON.
■Air conditioning system-linked
control mode
When the seat ventilator fan speed
level is Hi, the seat ventilator fan
speed becomes higher according to
the fan speed of the air conditioning
system.
Front passenger’s side radi-
ant heater
Driver’s side radiant heater
Turns the radiant heater on/off
Each time the switch is pressed,
the operation condition changes as
WARNING
■To prevent causes of over-
heating and minor burn inju-
ries
Observe the following precautions
when using a seat heater
●Do not cover the seat with a
blanket or cushion when using
the seat heater.
●Do not use seat heater more
than necessary.
Seat ventilators (front
seats)
Radiant heaters

4487-1. Maintenance and care
Owners Manual_USA_M42C01_en
7-1.Maintenance and care
Working from top to bottom,
liberally apply water to the
vehicle body, wheel wells and
underside of the vehicle to
remove any dirt and dust.
 Wash the vehicle body using
a sponge or soft cloth, such
as a chamois.
 For hard-to-remove marks,
use car wash soap and rinse
thoroughly with water.
 Wipe away any water.
 Wax the vehicle when the
waterproof coating deterio-
rates.
If water does not bead on a clean
surface, apply wax when the vehi-
cle body is cool.
■Self-restoring coat
The vehicle body has a self-restor-
ing coating that is resistant to small
surface scratches caused in a car
wash, etc.
●The coating lasts for 5 to 8 years
from when the vehicle is delivered
from the plant.
●The restoration time differs
depending on t he depth of the scratch and outside temperature.
The restoration time may become
shorter when the coating is
warmed by applying warm water.
●Deep scratches caused by keys,
coins, etc., cannot be restored.
●Do not use wax that contain abra-
sives.
■Automatic car washes
●Before washing the vehicle:
• Fold the mirrors
• Turn off the power back door (if equipped)
Start washing from the front of the
vehicle. Make sure to extend the
mirrors before driving.
●Brushes used in automatic car
washes may scratch the vehicle
surface, parts (wheel, etc.) and
harm your vehicle’s paint.
●Rear spoiler may not be washable
in some automatic car washes.
There may also be an increased
risk of damage to vehicle.
●When the shift position needs to
be held in N, refer to P.239.
■High pressure car washes
As water may enter the cabin, do
not bring the nozzle tip near the
gaps around the doors or perimeter
of the windows, or spray these
areas continuously.
■Note for a smart key system
●If the door handle becomes wet
while the electronic key is within
the effective range, the door may
lock and unlock repeatedly. In that
case, follow the following correc-
tion procedures to wash the vehi-
cle:
• Place the key in a position 6 ft. (2 m) or more separate from the
vehicle while the vehicle is being
washed. (Take care to ensure that
the key is not stolen.)
• Set the electronic key to battery-
saving mode to disable the smart
key system. ( P.188)
Cleaning and protect-
ing the vehicle exte-
rior
Perform the following to
protect the vehicle and
maintain it in prime condi-
tion:
Cleaning instructions

4707-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_enthe second attempt.
●The power switch mode is
recorded by the vehicle. If the 12-
volt battery is
disconnected and
reconnected, the vehicle will
return the power switch mode to
the status it was in before the 12-
volt battery was disconnected.
Make sure to turn off the power
switch before disconnecting the
12-volt battery. Take extra care
when connecting the 12-volt bat-
tery if the power switch mode prior
to the 12-volt battery being dis-
connected is unknown.
If the EV system will not start even
after multiple att empts at all the
methods above, contact your Toyota
dealer.
WARNING
■Chemicals in the 12-volt bat-
tery
Batteries contai n poisonous and
corrosive sulfuric acid and may
produce hydrogen gas which is
flammable and explosive. To
reduce the risk of death or serious
injury, take the following precau-
tions while working on or near the
12-volt battery:
●Do not cause sparks by touch-
ing the 12-volt battery terminals
with tools.
●Do not smoke or light a match
near the 12-volt battery.
●Avoid contact with eyes, skin
and clothes.
●Never inhale or swallow electro-
lyte.
●Wear protective safety glasses
when working near the 12-volt
battery.
●Keep children away from the
12-volt battery.
■Where to safely charge the
12-volt battery
Always charge the 12-volt battery
in an open area. Do not charge
the 12-volt battery in a garage or
closed room where there is insuf-
ficient ventilation.
■Emergency measures regard-
ing electrolyte
●If electrolyte gets in your eyes
Flush your eyes with clean
water for at least 15 minutes
and get immediate medical
attention. If possible, continue
to apply water with a sponge or
cloth while traveling to the near-
est medical facility.
●If electrolyte gets on your skin
Wash the affected area thor-
oughly. If you feel pain or burn-
ing, get medical attention
immediately.
●If electrolyte gets on your
clothes
It can soak through clothing on
to your skin. Imm ediately take
off the clothing and follow the
procedure above if necessary.
●If you accidentally swallow elec-
trolyte
Drink a large quantity of water
or milk. Get emergency medical
attention immediately.
■When there is insufficient 12-
volt battery fluid
Do not use if there is insufficient
fluid in the 12-volt battery. There
is a possible danger that the 12-
volt battery may explode.

4737-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_en
7
Maintenance and care
Summer tires are high-speed perfor-
mance tires best suited to highway
driving under dry conditions. Since
summer tires do not have the same
traction performanc e as snow tires,
summer tires are inadequate for
driving on snow-covered or icy
roads. For driving on snow-covered
roads or icy roads, the use of snow
tires is recommended. When install-
ing snow tires, be sure to replace all
four tires.
●All season tires
All season tires are designed to pro-
vide better traction in snow and to
be adequate for driving in most win-
ter conditions a s well as for use
year-round. All season tires, how-
ever, do not have adequate traction
performance compared with snow
tires in heavy or loose snow. Also,
all season tires fall short in accelera-
tion and handling performance com-
pared with summer tires in highway
driving.
●Snow tires
For driving on snow-covered roads
or icy roads, we recommend using
snow tires. If you need snow tires,
select tires of the same size, con-
struction and load capacity as the
originally installed tires. Since your
vehicle has radial tires as original
equipment, make sure your snow
tires also have radial construction.
Do not install stud ded tires without
first checking local regulations for
possible restrictions. Snow tires
should be installed on all wheels.
(  P.393)
■If the tread on snow tires wears
down below 0.16 in. (4 mm)
The effectiveness of the tires as
snow tires is lost.
WARNING
■When inspecting or replacing
tires
Observe the following precautions
to prevent accidents.
Failure to do so may cause dam-
age to parts of the drive train as
well as dangerous handling char-
acteristics, which may lead to an
accident resulting in death or seri-
ous injury.
●Do not mix tires of different
makes, models or tread pat-
terns.
Also, do not mix tires of remark-
ably different treadwear.
●Do not use tire sizes other than
those recommended by Toyota.
●Do not mix differently con-
structed tires (radial, bias-belted
or bias-ply tires).
●Do not mix summer, all season
and snow tires.
●Do not use tires that have been
used on another vehicle.
Do not use tires if you do not
know how they were used previ-
ously.
NOTICE
■Driving on rough roads
Take particular care when driving
on roads with loose surfaces or
potholes.
These conditions may cause
losses in tire inflation pressure,
reducing the cushioning ability of
the tires. In addition, driving on
rough roads may cause damage
to the tires themselves, as well as
the vehicle’s wheels and body.