2023 SUBARU SOLTERRA trailer

3875-4. Using the driving support systems
Owners Manual_USA_M42C01_en
5
Driving
■ECB (Electronically Con-
trolled Brake System)
The electronically controlled
system generates braking force
corresponding to the brake
operation
■ABS (Anti-lock Brake Sys-
tem)
Helps to prevent wheel lock
when the brakes are applied
suddenly, or if the brakes are
applied while driving on a slip-
pery road surface
■Brake assist
Generates an increased level of
braking force after the brake
pedal is depressed when the
system detects a panic stop sit-
uation
■VSC (Vehicle Stability Con-
trol)
Helps the driver to control skid-
ding when swerving suddenly or
turning on slippery road sur-
faces.
■Trailer Sway Control
Helps the driver to control trailer
sway by selectively applying
brake pressure for individual
wheels and reducing driving
torque when trailer sway is
detected.
■TRAC (Traction Control)
Helps to maintain drive power
and prevent the drive wheels
from spinning when starting the
vehicle or accelerating on slip-
pery roads
■Active Cornering Assist
(ACA)
Helps to prevent the vehicle
from drifting to the outer side by
performing inner wheel brake
control when attempting to
accelerate while turning
■Hill-start assist control
Helps to reduce the backward
movement of the vehicle when
starting on an uphill
■EPS (Electric Power Steer-
ing)
Employs an electric motor to
reduce the amount of effort
needed to turn the steering
wheel.
Driving assist systems
To keep driving safety and
performance, the following
systems operate automati-
cally in response to various
driving situations. Be
aware, however, that these
systems are supplementary
and should not be relied
upon too heavily when
operating the vehicle.
Summary of the driving
assist systems

3885-4. Using the driving support systems
Owners Manual_USA_M42C01_en
■The Secondary Collision
Brake
When the SRS airbag sensor
detects a collision and the sys-
tem operates, the brakes and
brake lights are automatically
controlled to reduce the vehicle
speed and help reduce the pos-
sibility of further damage due to
a secondary collision.
■When the
TRAC/VSC/ABS/Trailer Sway
Control systems are operating
The slip indicator light will flash
while the TRAC/VSC/ABS/Trailer
Sway Control systems are operat-
ing.
■Disabling the TRAC system
If the vehicle gets stuck in mud, dirt
or snow, the TRAC system may
reduce power from the EV system to
the wheels.
Pressing to turn the system off
may make it easier for you to rock
the vehicle in order to free it.
To turn the TRAC system off, quickly
press and release .
The “Traction Control Turned OFF”
will be shown on the multi-informa-
tion display.
Press again to t urn the system
back on.
■Turning off both TRAC, VSC
and Trailer Sway Control sys-
tems
To turn the TRAC/VSC/Trailer Sway
Control systems off, press and hold for more than 3 seconds while
the vehicle is stopped.
The VSC OFF indicator light will
come on and the “Traction Control
Turned OFF” will be shown on the
multi-information display.
*
Press again to turn the systems
back on.
*: PCS (Pre-Collision System) will also be disabled (only pre-collision
warning is available). The PCS
warning light will come on and a
message will be disp layed on the
multi-information display.
(  P.270)
■When the message is dis-
played on the multi-information
display showing that TRAC has
been disabled even if has
not been pressed
TRAC is temporary deactivated. If
the information continues to show,
contact your Toyota dealer.
■Operating conditions of hill-
start assist control
When all of the fo llowing conditions
are met, the hill-star t assist control
will operate:
●The shift position is in a position
other than P or N (when starting
off forward/backward on an

3895-4. Using the driving support systems
Owners Manual_USA_M42C01_en
5
Driving
upward incline)
●The vehicle is stopped
●The accelerator pedal is not
depressed
●The parking brake is not engaged
●Power switch is turned to ON
■Automatic system cancelation
of hill-start as sist control
The hill-start assis t control will turn
off in any of the following situations:
●The shift position is shifted to P or
N
●The accelerator pedal is
depressed
●The brake pedal is depressed and
the parking brake is engaged
●A maximum of 2 seconds have
elapsed after the brake pedal is
released
●Power switch is turned to OFF
■Sounds and vibrations caused
by the ABS, brake assist, VSC,
Trailer Sway Control, TRAC and
hill-start assist control systems
●A sound may be heard from the
motor compartment when the
brake pedal is dep ressed repeat-
edly, when the EV 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.
●Any of the following conditions
may occur when t he above sys-
tems 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.
■ECB operating sound
ECB operating sound may be heard
in the following cases, but it does
not indicate that a malfunction has
occurred.
●Operating sound heard from the motor compartment when the
brake pedal is operated.
●Operating sound heard from the
motor compartment when one or
two minutes passed after the stop
of the EV system.
■Active Cornering Assist opera-
tion sounds and vibrations
When the Active Cornering Assist is
operated, operation sounds and
vibrations may be generated from
the brake system, but this is not a
malfunction.
■EPS operation sound
When the steering wheel is oper-
ated, a motor sound (whirring
sound) may be heard. This does not
indicate a malfunction.
■Automatic reactivation of
TRAC, Trailer Sway Control and
VSC systems
After turning the TRAC, Trailer
Sway Control and VSC systems off,
the systems will be a utomatically re-
enabled in the following situations:
●When the power switch is turned
off
●If only the TRAC sy stem is turned
off, the TRAC will turn on when
vehicle speed increases.
If both the TRAC and VSC sys-
tems are turned of f, automatic re-
enabling will not occur when vehi-
cle speed increases
■Operating conditions of Active
Cornering Assist
The system operates when the fol-
lowing occurs.
●TRAC/VSC can operate
●The driver is attempting to accel-
erate while turning
●The system detects that the vehi-
cle is drifting to the outer side
●The brake pedal is released
■Reduced effectiveness of the
EPS system
The effectiveness of the EPS sys-

3915-4. Using the driving support systems
Owners Manual_USA_M42C01_en
5
Driving
WARNING
●Unlike the parking brake, hill-
start assist control is not
intended to hold the vehicle sta-
tionary for an extended period
of time. Do not attempt to use
hill-start assist control to hold
the vehicle on an incline, as
doing so may lead to an acci-
dent.
■When the
TRAC/ABS/VSC/Trailer Sway
Control is activated
The slip indicator light flashes.
Always drive carefully. Reckless
driving may cause an accident.
Exercise particular care when the
indicator light flashes.
■When the TRAC/VSC/Trailer
Sway Control systems are
turned off
Be especially careful and drive at
a speed appropriate to the road
conditions. As these are the sys-
tems to help ensure vehicle stabil-
ity and driving force, do not turn
the TRAC/VSC/Trailer Sway Con-
trol systems off unless necessary.
Trailer Sway Control is part of the
VSC system and will not operate
if VSC is turned off or experiences
a malfunction.
■Replacing tires
Make sure that all tires are of the
specified size, brand, tread pat-
tern and total load capacity. In
addition, make sure that the tires
are inflated to the recommended
tire inflation pressure level.
The ABS, TRAC, VSC and Trailer
Sway Control systems will not
function correctly if different tires
are installed on the vehicle.
Contact your Toyota dealer for fur-
ther information when replacing
tires or wheels.
■Handling of tires and the sus-
pension
Using tires with any kind of prob-
lem or modifying the suspension
will affect the driving assist sys-
tems, and may cause a system to
malfunction.
■Trailer Sway Control precau-
tion
The Trailer Sway Control system
is not able to red uce trailer sway
in all situations. Depending on
many factors such as the condi-
tions of the vehicle, trailer, road
surface and driving environment,
the Trailer Sway Control system
may not be effective. Refer to
your trailer owner’s manual for
information on how to tow your
trailer properly.
■If trailer sway occurs
Observe the following precau-
tions.
Failing to do so may cause death
or serious injury.
●Firmly grip the steering wheel.
Steer straight ahead. Do not try
to control trailer swaying by
turning the steering wheel.
●Begin releasing the accelerator
pedal immediately but very
gradually to reduce speed.
Do not increase speed. Do not
apply vehicle brakes.
If you make no extreme correction
with the steering or brakes, your
vehicle and traile r should stabi-
lize. ( P.229)

Owners Manual_USA_M42C01_en
Alphabetical Index609
“SOS” button .......................... 64
Tire pressure warning reset switch ................................. 477
Vehicle-to-vehicle distance switch ................................. 291
Ventilators (seat ventilators) . 413
VSC OFF switch................... 388
Window lock switch .............. 214
Windshield defogger switch . 403
Windshield wipers and washer switch ................................. 253
X-MODE switch .................... 382
Switching the meter display .. 154
“SYNC” mode ......................... 406
T
Tail lights Light switch .......................... 248
Replacing light bulbs ............ 502
Theft deterrent system Alarm ...................................... 69
Immobilizer system ................ 68
Tire inflation pre ssure............ 158
Maintenance data................. 555
Tire inflation pressure display function............................... 474
Warning buzzers .................. 516
Warning light ........................ 516
Tire information ...................... 556 Glossary ............................... 560
Size ...................................... 557
Tire identification number ..... 557
Tire section names ............... 558
Tire pressure warning system ............................................... 474Function ............................... 474
Installing tire pressure warning valves and transmitters ...... 476
Registering ID codes ............ 481
Registration of the position of each wheel ......................... 477
Selecting wheel set .............. 483 Setting the tire pre
ssure .......478
Warning buzzers...................516
Warning light.........................516
Tires .........................................472 Chains ..................................395
Checking ..............................472
Emergency tire puncture repair kit ........................................527
Glossary ...............................560
If you have a flat tire .............527
Inflation pressure ..................491
Information ......... ..................556
Replacing .............................485
Rotating tires ........................474
Size ......................................555
Snow tires.............................393
Tire identification number .....557
Tire inflation pressure display function ...............................474
Tire pressure w arning system
...........................................474
Uniform Tire Quality Grading 558
Warning buzzers...................516
Warning light.........................516
Tools ................................486, 528
Top tether strap ........................61
Total load capacity .........225, 228
To w i n g Dinghy towing .......................230
Emergency towing ........507, 509
Towing eyelet........................510
Trailer sway control ..............387
Trailer towing ...... ..................229
Toyota Safety Sense 3.0.........259 Automatic High Beam (AHB) 250
Dynamic radar cruise control 288
Emergency Driving Stop System ...........................................299
LDA (Lane Departure Alert) ..281
LTA (Lane Tracing Assist) .....276
PCS (Pre-Collisio n System) .265
RSA (Road Sign Assist) ........286

610Alphabetical Index
Owners Manual_USA_M42C01_en
Software update ................... 257
Toyota Teammate Advanced Park ....................................... 344Memory function................... 366
Parallel exiting function ........ 364
Parallel parking function ....... 360
Perpendicular exiting (forward/ reverse) function ................ 359
Perpendicular parking (forward/ reverse) function ................ 356
Remote control function ....... 371
TRAC (Traction Control) ........ 387
Traction battery ........................ 72 Charging....................... 105, 113
Location.................................. 72
Specification ......................... 552
Traction battery cooler............ 99
Traction battery heater ........... 99
Warning messages............... 140
Traction battery charge Warning light ........................ 515
Traction Control (TRAC) ........ 387
Trailer sway control ............... 387
Trailer towing .......................... 229
Transmission .......................... 236
Trip meters .............................. 154
Turn signal lights Replacing light bulbs ............ 502
Turn signal lever ................... 242
U
USB charging ports................ 429
Utility vehicle precautions ..... 396
V
Vanity lightsVanity lights .......................... 428
Vanity mirrors ......................... 428 Vanity lights .......................... 428
Vehicle data recordings ............. 8
Vehicle identifi cation number550 Vehicle information display ...158
Vehicle Stability Control (VSC)
...............................................387
Ventilators (seat ventilators) . 411
VSC (Vehicle Stability Control) ...............................................387
W
Warning buzzers Acceleration Suppression at Low Speed .................................268
Approach warning ................294
Brake hold ............................519
Brake Override System ........514
Brake system ........................513
Break suggestion function ....284
Cruise control .......................517
Drive-Start Control ................514
Dynamic radar cruise control 518
Electric power steering .........515
Hands off steering wheel warn- ing (LDA) ............................283
Hands off steering wheel warn- ing (LTA) .............................278
Intuitive parking assist ..319, 517
LDA (Lane Departure Alert) 281, 516
LTA (Lane Tracing Assist) ...276, 516
Open door ............................170
Open hood............................170
Open window........................213
PCS (Pre-Collisio n System) .518
Pre-collision warn ing ............266
Seat belt .......................515, 516
SRS airbag ...........................514
Tire pressure ...... ..................516
Warning lights .........................513 ABS ......................................514
Brake hold operated indicator...........................................519
Brake Override System ........514