2022 LEXUS IS350 power steering

3327-2. Steps to take in an emergency
■Electric power steering system warning light (warning buzzer)
■Low fuel level warning light
■Driver’s and front passenger’s seat belt reminder light (warning buzzer)*
*: Driver’s seat belt warning buzzer:
The driver’s seat belt warning buzzer sounds to alert the driver that his or her seat belt is not
fastened. Once the engine switch is turned to IGNITION ON mode, the buzzer sounds. If
the seat belt is still unfastened, the buzzer sounds intermittently for a certain period of time
after the vehicle reaches a certain speed.
Front passenger’s seat belt warning buzzer:
The front passenger’s seat belt warning buzzer sounds to alert the front passenger that his
or her seat belt is not fastened. If the seat be lt is unfastened, the buzzer sounds intermittenly
for a certain period of time after the vehicle reaches a certain speed.
■Rear passengers’ seat belt reminder lights*1 (warning buzzer)*2
Warning lightDetails/Actions
(red)
or
(yellow)
Indicates a malfunction in the EPS (Electric Power Steering) system
Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
Indicates that remaining fuel is approximately 2.6 gal. (10 L, 2.2 Imp.
gal.) or less
 Refuel the vehicle.
Warning lightDetails/Actions
Warns the driver and/or front passenger to fasten their seat belts
Fasten the seat belt.
If the front passenger’s seat is occupied, the front passenger’s seat
belt also needs to be fastened to make the warning light (warning
buzzer) turn off.
Warning lightDetails/Actions
Warns the rear passengers to fasten their seat belts
 Fasten the seat belt.

3367-2. Steps to take in an emergency
●Is the fuel tank empty?
If it is, fill the fuel 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 Lexus dealer as soon as
possible.
■Electric power steering system warning
light (warning buzzer)
When the battery charge becomes insuffi-
cient or the voltage temporarily drops, the
electric power steeri ng system warning
light may come on and the warning buzzer
may sound.
■When the tire pressure warning light
comes on
Inspect the tires to check if a tire is punc-
tured.
If a tire is punctured: P.341
If none of the tires are punctured:
Turn the engine switch off then turn it to
IGNITION ON mode. Check if the tire
pressure warning light comes on or blinks.
If the tire pressure wa rning light blinks for
approximately 1 minute then stays on
There may be a malfunction in the tire
pressure warning system. Have the vehicle
inspected by your Lexus dealer immedi-
ately.
If the tire pressure warning light comes
on
1 After the temperature of the tires has
lowered sufficiently, check the inflation
pressure of each tire and adjust them to
the specified level.
2 If the warning light does not turn off
even after several minutes have
elapsed, check that the inflation pres-
sure of each tire is at the specified level
and perform initialization. ( P.301)
■The tire pressure warning light may
come on due to natural causes
The tire pressure warning light may come
on due to natural causes such as natural air
leaks and tire inflation pressure changes
caused by temperature. In this case, adjust-ing the tire inflation pressure will turn off the
warning light (after a few minutes).
■When a tire is replaced with the spare
tire
The spare tire is not equipped with a tire
pressure warning valve and transmitter. If a
tire goes flat, the tire pressure warning light
will not turn off even th ough the flat tire has
been replaced with the spare tire.
■Conditions that the tire pressure warn-
ing system may not function properly
P.299
WARNING
■If both the ABS and the brake system
warning lights remain on
Stop your vehicle in a safe place immedi-
ately and contact your Lexus dealer.
The vehicle will become extremely
unstable during br aking, and the ABS
system may fail, which could cause an
accident resulting in death or serious
injury.
■When the electric power steering
system warning light comes on
When the light comes on yellow, the
assist to the power st eering is restricted.
When the light comes on red, the assist
to the power steering is lost and handling
operations of the steering wheel become
extremely heavy.
When steering wheel operations are
heavier than usual, grip the steering
wheel firmly and operate it using more
force than usual.
■If the tire pressure warning light
comes on
Be sure to observe the following precau-
tions.
Failure to do so could cause a loss of
vehicle control and result in death or
serious injury.
●Decelerate to the lowest appropriate
speed as soon as possible. Do not
drive over 50 mph (80 km/h).

3397-2. Steps to take in an emergency
7
When trouble arises
■If “Engine Stopped Steering Power
Low” is displayed
This message is displa yed if the engine is
stopped while driving.
When steering wheel operations are
heavier than usual, gr ip the steering wheel
firmly and operate it using more force than
usual.
■If “Auto Power Off to Conserve Battery”
is displayed
Power was turned off due to the automatic
power off function. Next time when starting
the engine, increase the engine speed
slightly and maintain that level for approxi-
mately 5 minutes to recharge the battery.
■If “Headlight System Malfunction Visit
Your Dealer” is displayed
The following systems may be malfunction-
ing. Have the vehicle inspected by your
Lexus dealer immediately.
●The LED headlight system
●The automatic headlig ht leveling system
(if equipped)
●Automatic High Beam
■If “Radar Cruise Control Unavailable
See Owner's Manual” is displayed
The dynamic radar cruise control with
full-speed range system is suspended tem-
porarily or until the problem shown in the
message is resolved. (causes and coping
methods: P.163)
■If “Radar Cruise Control Unavailable” is
displayed
The dynamic radar cruise control with
full-speed range system cannot be used
temporarily. Use the system when it
becomes available again.
■If a message that indicates the malfunc-
tion of front camera is displayed
The following systems may be suspended
until the problem shown in the message is
resolved. ( P.163, 329)
●PCS (Pre-Collision system)
●LTA (Lane Tracing Assist)
●Automatic High Beam
●RSA (Road Sign Assi st) (if equipped)
●Dynamic radar cruise control with
full-speed range
■If a message that indicates the malfunc-
tion of radar sensor is displayed
The following systems may be suspended
until the problem show n in the message is
resolved. ( P.163, 329)
●PCS (Pre-Collision system)
●LTA (Lane Tracing Assist)
●Dynamic radar cruise control with
full-speed range
■If “Maintenance Required Soon” is dis-
played
Indicates that all maintenance according to
the driven distance on the maintenance
schedule
* should be performed soon.
Comes on approximately 4500 miles
(7200 km) after the message has been
reset. If necessary, perform maintenance.
Please reset the message after the mainte-
nance is performed. (P.278)
*: Refer to the separate “Scheduled Main-
tenance” or “Owner’s Manual Supple-
ment” for the main tenance interval
applicable to your vehicle.
■If “Maintenance Required Visit Your
Dealer” is displayed
Indicates that all mainte nance is required to
correspond to the driven distance on the
maintenance schedule
*.
Comes on approximately 5000 miles
(8000 km) after the message has been
reset. (The indicator will not work properly
unless the message has been reset.) Per-
form the necessary maintenance. Please
reset the message after the maintenance is
performed. ( P.278)
*: Refer to the separate “Scheduled Main-
tenance” or “Owner’s Manual Supple-
ment” for the main tenance interval
applicable to your vehicle.
■If “Oil Maintenance Required Soon” is
displayed
Indicates that the engine oil should be
scheduled to be changed.

3828-1. 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

3988-3. Initialization
8-3.Initialization
*:If equipped
Items to initialize
The following items must be initialized for normal system operation after such
cases as the battery being reconnecte d, or maintenance being performed on
the vehicle:
List of items to initialize
ItemWhen to initializeReference
PKSB (Parking Support
Brake)
*• After reconnecting or changing the
batteryP.220
Intuitive parking assist*• After reconnecting or changing the
batteryP.205
Message indicating
maintenance is
required
• After the maintenance is performedP.278
Oil maintenance• After the maintenance is performedP.291
Tire pressure warning
system
• When rotating the tires
• When the tire inflation pressure is
changed such as when changing
traveling speed or load weight
• When changing the tire size
P.300
Lexus parking assist
monitor
*
• Battery has been reinstalled.
• The steering wheel has been moved while the battery was being reinstalled.
• Battery power is low.Refer to the “NAVI-
GATION AND MUL- TIMEDIA SYSTEM OWNER’S MAN- UAL”.
Panoramic view moni-
tor
*
• Battery has been reinstalled.
• The steering wheel has been moved while the battery was being reinstalled.
• Battery power is low.Refer to the “NAVI-
GATION AND MUL- TIMEDIA SYSTEM OWNER’S MAN- UAL”.

413What to do if... (Troubleshooting)
depleted?
In this case, the engine can be started in a
temporary way. (P.352)
 Is the battery discharged?
( P.353)
 Is the engine switch in IGNITION
ON mode?
If you cannot release the shift lever by
depressing the brake pedal with the engine
switch in IGNITION ON mode. ( P.135)
 It is locked automatically to prevent
theft of the vehicle. ( P.130)
 Is the window lock switch pressed?
The power window except for the one at
the driver’s seat cannot be operated if the
window lock switch is pressed. ( P.115)
 The auto power off function will be
operated if the vehicle is left in
ACCESSORY or IGNITION ON
mode (the engine is not running) for
a period of time. ( P.132) 
The seat belt reminder light is flash-
ing
Are the driver and the front passenger
wearing the seat belts? ( P.332)
The parking brake indicator is on
Is the parking brake released? ( P.139)
Depending on the situation, other
types of warning buzzer may also
sound. (P.329, 338)
 Did anyone inside the vehicle open
a door during setting the alarm?
The sensor detects it and the alarm sounds.
(P.61)
Do one of the following to deactivate
or stop the alarm:
 Unlock the doors.
 Open the trunk.
 Turn the engine switch to ACCES-
SORY or IGNITION ON mode, or
start the engine. (The alarm will be
deactivated or stopped after a few
seconds.)
 Is the electronic key left inside the
vehicle or the moon roof opened?
Check the message on the multi-informa-
The shift lever cannot be shifted
from P even if you depress the
brake pedal
The steering wheel cannot be
turned after the engine is
stopped
The windows do not open or
close by operating the power
window switches
The engine switch is turned off
automatically
A warning buzzer sounds during
driving
An alarm is activated and the
horn sounds
A warning buzzer sounds when
leaving the vehicle

416Alphabetical Index
BuzzerHands off steering wheel warning (LTA).......................................................................... 183
C
Card key ............................................................ 86
Care Exterior ........................................................... 270
Interior ............................................................. 274
Seat belts........................................................ 274
Wheels and wheel ornaments.. 270, 271
Cargo capacity...............................................128
Cargo net ....................................................... 258
Center Display ............................................. 240
Chains .............................................................. 235
Child restraint system Fixed with a LATCH system .................. 49
Fixed with a seat belt................................... 45
Front passenger occupa nt classification
system ............................................................. 36
Points to remember ...................................... 41
Riding with children ....................................... 41
Types of child restraint system installation method ............................................................42
Using an anchor bracket ............................ 51
Child safety Airbag precautions...................................... 33
Battery precautions ..................................356
Child restraint system..................................42
Heated steering wheel and seat heater precautions..................................................251
How your child should wear the seat belt ............................................................................ 25
Moon roof precautions ............................. 118
Power window lock switch...................... 115
Power window precautions .................... 115
Rear door child-protectors ..................... 93
Removed electronic key battery precau- tions ...............................................................309
Seat belt extender precautions ............. 25
Seat belt precautions .................................... 41
Trunk precautions ........................................ 94 Child-protectors............................................. 93
Cleaning
Exterior............................................................ 270
Interior ............................................................. 274
Radar sensor ................................................. 160
Seat belts ........................................................ 274
Wheels and wheel ornaments .. 270, 271
Clock ............................................... 69, 70, 260
Coat hooks..................................................... 260
Condenser ..................................................... 293
Console box .................................................. 257
Consumption screen .................................... 82
Cooling system............................................. 292 Engine overheating...................................357
Cruise control Dynamic radar cruise control with full-speed range ....................................... 187
Cup holders ................................................... 257
Current fuel consumption .......................... 78
Curtain shield airbags .................................. 28
Customizable features ..............................388
D
Daytime running light system ...................145
Defogger Outside rear view mirrors.....................245
Rear window ................................................245
Windshield ....................................................245
Differential Front differential oil......................................371
Rear differential oil.......................................371
Dimensions .................................................... 364
Dinghy towing.................................................129
Display Center Display ............................................240
Dynamic radar cruise control with full-speed range ....................................... 187
Intuitive parking assist ..............................203
LTA (Lane Tracing Assist) ..................... 180
Multi-information display .......................... 75
RCTA................................................................ 210
Warning message .................................... 338

417Alphabetical Index
Distance until next engine oil change .....74
Do-it-yourself maintenance .................... 279
Door courtesy lights ................................... 253Wattage.......................................................... 375
Door lock Doors .................................................................. 90
Smart access system with push-button start ................................................................... 97
Wireless remote control...........................88
Doors Automatic door lock ing and unlocking
system ............................................................. 93
Door glasses ....................................................114
Door lock.......................................................... 90
Open door warning buzzer ............ 91, 93
Outside rear view mirrors ........................112
Rear door child-protectors ..................... 93
Drive distance .................................................. 78
Drive info 1/Drive info 2/Drive info 3.... 78
Driver’s seat position memory Driving position memory........................ 104
Memory recall function ........................... 105
Power easy access system .................... 104
Drive-Start Control (DSC) Sudden start restraint control................125
Driving Break-in tips .....................................................121
Correct driving posture .............................23
Driving mode select switch ...................227
Procedures .....................................................120
Winter drive tips......................................... 234
Driving information display ......................... 77
Driving position memory........................... 104 Memory recall function ........................... 105
Power easy access system .................... 104
Driving range ................................................... 78
Driving support system information display ............................................................................. 80
DSC (Drive-Start Control) Sudden start restraint control................125 Dynamic radar cruise control with
full-speed range ..........................................187 Warning message ...................................... 195
E
Eco Driving Indicator.....................................79
Eco Driving Indicator Light .........................79
EDR (Event data recorder) ............................7
Elapsed time ..................................................... 78
Electric Power Steering (EPS) .............. 229 Warning light ............................................... 332
Electronic key .................................................. 86 Battery-saving function..............................98
If the electronic key does not operate properly ........................................................ 351
Replacing the battery .............................. 308
Emergency flashers .................................... 320
Emergency, in case of If a warning buzzer sounds...................329
If a warning light turns on.......................329
If a warning message is displayed.... 338
If the battery is discharged ....................353
If the electronic key does not operate properly ........................................................ 351
If the engine will not start........................349
If the fuel filler do or cannot be opened
........................................................................... 351
If the vehicle is submerged or water on the road is rising ........................................321
If you have a flat tire ....................................341
If you lose your keys ................................ 350
If you think something is wrong.......... 327
If your vehicle becomes stuck .............. 361
If your vehicle has to be stopped in an emergency .................................................320
If your vehicle needs to be towed ..... 323
If your vehicle overheats ........................357
Engine ACCESSORY mode................................132
Compartment..............................................287
Engine switch ................................................ 130
Fuel pump shut off system.....................328