traction control LEXUS RC350 2022 Owners Manual

8
RC350/RC300 Owner's Manual
Special handling may apply, See
www.dtsc.ca.gov/hazardouswaste/
perchlorate.
Your vehicle has components that may
contain perchlorate. These compo-
nents may include airbag, seat belt
pretensioners, and wireless remote
control batteries.
Perchlorate Material
WARNING
■General precautions while driving
Driving under the infl uence: Never drive
your vehicle when under the influence of
alcohol or drugs that have impaired your
ability to operate your vehicle. Alcohol
and certain drugs delay reaction time,
impair judgment an d reduce coordina-
tion, which could lead to an accident that
could result in death or serious injury.
Defensive driving: Always drive defen-
sively. Anticipate mi stakes that other
drivers or pedestrians might make and
be ready to avoid accidents.
Driver distraction: Always give your full
attention to driving. Anything that dis-
tracts the driver, such as adjusting con-
trols, talking on a cellular phone or
reading can result in a collision with
resulting death or serious injury to you,
your occupants or others.
■General precaution regarding chil-
dren’s safety
Never leave children unattended in the
vehicle, and never allow children to have
or use the key.
Children may be able to start the vehicle
or shift the vehicle into neutral. There is
also a danger that children may injure
themselves by playin g with the windows,
the moon roof, or other features of the
vehicle. In addition , heat build-up or
extremely cold temperatures inside the
vehicle can be fatal to children.

1994-5. Using the driving support systems
RC350/RC300 Owner's Manual
4
Driving
■TRAC (Traction Control)
Helps to maintain drive power and pre-
vent the drive wheels from spinning
when starting the vehicle or accelerat-
ing on slippery roads
■Hill-start assist control
Helps to reduce the backward move-
ment of the vehicle when starting on an
uphill
■VGRS (Variable Gear Ratio Steer-
ing) (if equipped)
Adjusts the front wheel turning angle in
accordance with the vehicle speed and
steering wheel movement
■DRS (Dynamic Rear Steering) (if
equipped)
Contributes to the turning characteris-
tics and responsiveness of the vehicle
by adjusting the rear wheel angle of the
vehicle in accordance with steering
wheel movement.
■EPS (Electric Power Steering)
Employs an electric motor to reduce
the amount of effort needed to turn the
steering wheel
■Adaptive Variable Suspension Sys-
tem (if equipped)
By independently controlling the
damping force of the shock absorbers
for each of the 4 wheels according to
the road and driving conditions, this
system combines riding comfort with
superior vehicle stability, and helps
good vehicle posture.
■LDH (Lexus Dynamic Handling
system) (if equipped)
Provides integrated control of the
VGRS, DRS and EPS. Contributes to
turning characteristics at low speeds,
responsiveness at medium speeds and
safety at high speeds by controlling the
steering angle of the front and rear
wheels in accordance with the steering
wheel operation and vehicle speed.
■VDIM (Vehicle Dynamics Inte-
grated Management)
Provides integrated control of the
ABS, brake assist, TRAC, VSC,
hill-start assist control, EPS and VGRS
systems
Helps to maintain vehicle stability when
swerving on slippery road surfaces by
controlling the brakes, engine output,
steering assist, and steering ratio
■When the TRAC/VSC systems are
operating
The slip indicator light will flash while the
TRAC/VSC systems are operating.
■Disabling the TRAC system
If the vehicle gets stuck in mud, dirt or snow,
the TRAC system may reduce power from
the engine to the wheels. Pressing the
switch 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

2004-5. Using the driving support systems
RC350/RC300 Owner's Manual
and release the switch.
The “Traction Control Turned Off” will be
shown on the multi-information display.
Press the switch again to turn the sys-
tem back on.
■Turning off both TRAC and VSC sys-
tems
To turn the TRAC and VSC systems off,
press and hold the switch 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 mult i-information display.
*
Press the switch again to turn the sys-
tems back on.
*: On vehicles with PCS (Pre-Collision
System), pre-collision brake assist,
pre-collision braking, and steering con-
trol (performed through cooperative
control of PCS and LDH) (if equipped)
will also be disabl ed. The Pre-Collision
System warning light will come on and a
message will be displayed on the
multi-information display. ( P.166)
■When the message is displayed on the
multi-information display showing that
TRAC has been disabled even if the
switch has not been pressed
TRAC is temporary deactivated. If the infor-
mation continues to show, contact your
Lexus dealer.
■Operating conditions of hill-start assist
control
When the following four conditions are met,
the hill-start assist control will operate:
●The shift lever is in a position other than P
or N (when starting off forward/back-
ward on an upward incline).
●The vehicle is stopped.
●The accelerator pedal is not depressed.
●The parking brake is not engaged.
●Engine switch is turned to IGNITION
ON mode
■Automatic system cancelation of
hill-start assist control
The hill-start assist control will turn off in any
of the following situations:
●The shift lever is moved to P or N.
●The accelerator pedal is depressed.
●The parking brake is engaged.
●2 seconds at maximum elapsed after the
brake pedal is released
●Engine switch is turned to off
■VGRS is disabled when
VGRS may stop operat ing in the following
situations.
In this event, the steering wheel may move
from its straight forward position, but it will
return when the system restarts.
●When the steering wheel is operated for
an extended period of time while the
vehicle is stopped or is moving very
slowly
(on vehicles with LDH, DRS is disabled
together with VGRS)
●When the steering wheel has been held
fully to the left or right
The center position of the steering wheel
may change when VGRS is disabled. How-

2967-2. Steps to take in an emergency
RC350/RC300 Owner's Manual
■LDA (Lane Departure Alert) indicator
■PCS warning light
■Slip indicator
Warning lightDetails/Actions
(orange)
If the LDA indicator is illuminated:
Indicates a malfunction in the LDA (Lane Departure Alert with steering
control) system.
Check the warning message displa yed on the multi-information
display. ( P.172)
If the LDA indicator flashes:
Indicates that the vehicle has deviated from the lane (while the LDA
[Lane Departure Alert with steering control] system is operating)
 Check the area around the vehicle and return the vehicle to
between the lane lines.
Warning lightDetails/Actions
(flashes or illumi-
nates)
When a buzzer sounds simultaneously:
Indicates a malfunction has occurred in the PCS (Pre-Collision System).
 Have the vehicle inspected by your Lexus dealer immediately.
When a buzzer does not sound:
The PCS (Pre-Collision System) has become temporarily unavailable,
corrective action may be necessary.
 Follow the instructions displayed on the multi-information display.
( P.158, 303)
If the PCS (Pre-Collision System) or VSC (Vehicle Stability Control)
system is disabled, the PCS warning light will illuminate.
 P.166
Warning lightDetails/Actions
Indicates a malfunction in:
The VSC (Vehicle Stability Control) system;
 The TRAC (Traction Control) system; or
 The hill-start assist control system
The light will flash when the VSC or the TRAC system is operating.
 Have the vehicle inspected by your Lexus dealer immediately.

3428-1. Specifications
RC350/RC300 Owner's Manual
Wheel diameter
Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer
This information has been prepared in
accordance with regulations issued by
the National Highway Traffic Safety
Administration of the U.S. Department
of Transportation.
It provides the purchasers and/or pro-
spective purchasers of Lexus vehicles
with information on uniform tire quality
grading.
Your Lexus dealer will help answer any questions you may have as you read this
information.
■DOT quality grades
All passenger vehicle tires must con-
form to Federal Safety Requirements in
addition to these grades. Quality
grades can be found where applicable
on the tire sidewall between tread
shoulder and maximum section width.
For example: Treadwear 200 Traction AA
Temperature A
■Treadwear
The treadwear grade is a comparative
rating based on the wear rate of the tire
when tested under controlled condi-
tions on a specified government test
course.
For example, a tire graded 150 would wear
one and a half (1 - 1/2) times as well on the
government course as a tire graded 100.
The relative performance of tires depends
upon the actual condit ions of their use.
Performance may differ significantly from
the norm due to variatio ns in driving habits,
service practices and differences in road
characteristics and climate.
■Traction AA, A, B, C
The traction grades, from highest to
lowest, are AA, A, B and C, and they
represent the tire’s ability to stop on
wet pavement as measured under con-
trolled conditions on specified govern-
ment test surfaces of asphalt and
concrete.
A tire marked C may have poor traction
performance.
Warning: The traction grade assigned to
this tire is based on braking (straight
ahead) traction tests and does not include
Tire section names
Uniform Tire Quality Grading
C
A
B
C
D
E
F
G
H
I
J
K

3438-1. Specifications
RC350/RC300 Owner's Manual
8
Vehicle specifications
cornering (turning) traction.
■Temperature A, B, C
The temperature grades are A (the
highest), B, and C, representing the
tire’s resistance to the generation of
heat and its ability to dissipate heat
when tested under controlled condi-
tions on a specified indoor laboratory
test wheel.
Sustained high temperature can cause the
material of the tire to degenerate and
reduce tire life, and excessive temperature
can lead to sudden tire failure. Grade C corresponds to
a level of perfor-
mance which all passenger car tires must
meet under the Federal Motor Vehicle
Safety Standard No. 109.
Grades B and A represent higher levels of
performance on the laboratory test wheel
than the minimum required by law.
Warning: The temperatur e grades of a tire
assume that it is properly inflated and not
overloaded.
Excessive speed, unde rinflation, or exces-
sive loading, either separately or in combi-
nation, can cause heat buildup and
possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pressure
Tire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Maximum inflation pressureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic trans-
mission, power steering, power brakes, power win-
dows, power seats, radio and heater, to the extent
that these items are available as factory-installed
equipment (whether installed or not)
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil
and coolant, and if so equipped, air conditioning
and additional weight optional engine

393Alphabetical Index
RC350/RC300 Owner's Manual
Moon roof switches .....................................112
“ODO TRIP” switch .................................... 70
Outside rear view mirror switches .... 108
Paddle shift switches ......................... 131, 132
Parking brake switch .................................135
PCS OFF switch ..........................................162
Power door lock switch ............................88
Power window switches ........................... 110
Rear window and outside rear view mir- ror defoggers switch .............................. 213
Seat heater switches .................................. 221
Seat ventilator switches ............................ 221
Snow mode switch ...................................... 131
“SOS” button .................................................. 52
Tilt and telescopic steering control switch .......................................................................... 106
Tire pressure warning reset switch ..268
Trunk opener main switch ....................... 92
Trunk opener switch ................................... 90
VSC OFF switch .........................................199
Window lock switch ..................................... 111
Windshield wiper and washer switch145
Windshield wiper de-icer switch ........ 217
T
Tachometer....................................................... 66 Rev indicator ................................................... 68
Rev peak ........................................................... 69
Tail lights Light switch .................................................... 140
Replacing light bulbs................................280
Wattage.......................................................... 336
Theft deterrent system Alarm .................................................................. 57
Engine immobilizer system ..................... 56
Theft prevention labels............................... 59
Tire inflation pressure Maintenance data...................................... 332
Tire inflation pressure display function......................................................................... 266
Warning light ...............................................298 Tire information ............................................ 339
Glossary .........................................................343
Size ......................................................................341
Tire identification number..................... 340
Uniform Tire Quality Grading ............ 342
Tire infration pressure .................................. 75
Tire pressure display .................................. 266
Tire pressure warning system Function ..........................................................266
Initializing........................................................ 267
Installing tire pres sure warning valves
and transmitters....................................... 267
Registering ID codes ...............................269
Warning light .............................................. 298
Tires Chains .............................................................204
Checking ....................................................... 263
If you have a flat tire ................................. 305
Inflation pressure .......................................... 271
Information ....................................................339
Replacing ...................................................... 305
Rotating tires ................................................265
Size .................................................................... 332
Snow tires ......................................................203
Spare tire ....................................................... 305
Tire inflation pressure display function..........................................................................266
Tire pressure warning system .............266
Warning light .............................................. 298
Tools.................................................................. 305
Top tether strap.........................................41, 49
Total load capacity ...................................... 326
Towing Dinghy towing ...............................................124
Emergency towing.................................... 287
Towing eyelet.............................................. 289
Trailer towing .................................................124
TRAC (Traction Control) ..........................199
Traction Control (TRAC) ..........................199
Trailer towing .................................................. 124
Transmission Automatic transmission ............................129