2021 LEXUS IS300 immobilizer

2TABLE OF CONTENTS
For your information ......................................5
Reading this manual ....................................... 9
How to search ............................................... 10
Pictorial index .................................................. 11
1-1. For safe use Before driving .................................... 22
For safe driving.................................. 23
Seat belts ............................................. 24
SRS airbags ....................................... 28
Front passenger occupant classifi- cation system ................................. 36
Exhaust gas precautions .............. 40
1-2. Child safety Riding with children.......................... 41
Child restraint systems ................... 41
1-3. Lexus Enform Lexus Enform Safety Connect .. 54
1-4. Theft deterrent system Engine immobilizer system ......... 60
Alarm..................................................... 62
Theft prevention labels ................. 63
2-1. Instrument cluster Warning lights and indicators .... 66
Gauges and meters ......................... 71
Multi-information display............. 76
Fuel consumption information ... 833-1. Key information
Keys ...................................................... 88
3-2. Opening, closing and locking the doors and trunk
Doors .................................................... 92
Trunk ..................................................... 96
Smart access system with push-but- ton start ............................................. 99
3-3. Adjusting the seats Front seats........................................ 106
Rear seats......................................... 107
Driving position memory ........... 108
Head restraints ................................. 111
3-4. Adjusting the steering wheel and mirrors
Steering wheel ................................. 113
Inside rear view mirror ................. 114
Outside rear view mirrors........... 116
3-5. Opening, closing the windows and moon roof
Power windows .............................. 118
Moon roof ........................................ 120
4-1. Before driving Driving the vehicle......................... 124
Cargo and luggage...................... 130
Vehicle load limits.......................... 132
Trailer towing................................... 132
Dinghy towing ................................ 133
4-2. Driving procedures Engine (ignitio n) switch ............... 134
1For safety and security
2Vehicle status information and
indicators
3Before driving
4Driving

21
1
1
For safety and security
For safety and security
.1-1. For safe useBefore driving ................................. 22
For safe driving.............................. 23
Seat belts .......................................... 24
SRS airbags .................................... 28
Front passenger occupant classifi- cation system .............................. 36
Exhaust gas precautions ........... 40
1-2. Child safety Riding with children....................... 41
Child restraint systems ................ 41
1-3. Lexus Enform Lexus Enform Safety Connect........................................................... 54
1-4. Theft deterrent system Engine immobilizer system ...... 60
Alarm................................................. 62
Theft prevention labels .............. 63

601-4. Theft deterrent system
1-4.Theft deterrent system
The indicator light flashes after the
engine switch has been turned off to
indicate that the system is operating.
The indicator light stops flashing after
the engine switch has been turned to
ACCESSORY or IGNITION ON
mode to indicate that the system has
been canceled.
■System maintenance
The vehicle has a maintenance-free type
engine immobilizer system.
■Conditions that may cause the system to
malfunction
●If the grip portion of the key is in contact
with a metallic object
●If the key is in close proximity to or touch-
ing a key registered to the security sys-
tem (key with a built-in transponder chip)
of another vehicle
Engine immobilizer system
The vehicle’s keys have built-in tran-
sponder chips that prevent the
engine from starting if a key has not
been previously registered in the
vehicle’s on-board computer.
Never leave the keys inside the
vehicle when you leave the vehicle.
This system is designed to help pre-
vent vehicle theft but does not
guarantee absolute security
against all vehicle thefts.
Operating the system

611-4. Theft deterrent system
1
For safety and security
■Certification for the engine immobilizer system
For vehicles sold in the U.S.A.
For vehicles sold in Canada
NOTICE
■To ensure the system operates cor-
rectly
Do not modify or remove the system. If
modified or removed, the proper opera-
tion of the system cannot be guaranteed.

1003-2. Opening, closing and locking the doors and trunk
●When an interior alarm sounds continu-
ously
■If a warning message is displayed indi-
cating that there is a malfunction in the
smart access system with push-button
start
An attempt was made to lock the doors
using the smart access system with
push-button start while the electronic key
was still inside the vehicle. Retrieve the elec-
tronic key from the vehicle and lock the
doors again.
■Battery-saving function
The battery-saving fu nction will be acti-
vated in order to prevent the electronic key
battery and the vehicle battery from being
discharged while the vehicle is not in opera-
tion for a long time.
●In the following situations, the smart
access system with pu sh-button start may
take some time to unlock the doors.
• The electronic key has been left within approximately 6 ft. (2 m) of the outside of
the vehicle for 10 minutes or longer.
• The smart access system with push-but- ton start has not been used for 5 days or
longer.
●If the smart access system with push-but-
ton start has not been used for 14 days or
longer, the doors cann ot be unlocked at
any door except the driver’s door. In this
case, hold the driver’s door handle, or use
the wireless remote control or mechani-
cal key, to unlock the doors.
■Electronic Key Battery-Saving Function
When battery-saving mode is set, battery
depletion is minimized by stopping the elec-
tronic key from receiving radio waves.
Press twice while pressing and holding
. Confirm that the electronic key indica-
tor flashes 4 times.
While the battery-saving mode is set, the
smart access system with push-button start
cannot be used. To cancel the function,
press any of the electronic key buttons.
■Conditions affecting operation
The smart access system with push-button
start uses weak radio waves. In the following
situations, the communication between the
electronic key and the vehicle may be
affected, preventing the smart access sys-
tem with push-button start, wireless remote
control and engine immobilizer system
from operating properly. (Ways of coping:
 P.359)
●When the electronic key battery is
depleted
●Near a TV tower, electric power plant,
SituationCorrection
procedure
An attempt was made to lock the vehicle while a door was open.Close all of the doors and lock the doors again.
The trunk was closed
while the electronic key was still inside the trunk and all the doors were locked.Retrieve the
electronic key
from the trunk and close the trunk lid.
SituationCorrection procedure
The engine switch was
turned to ACCESSORY mode while the driver’s door was open (The
driver’s door was opened when the engine switch was in ACCESSORY mode).
Turn the engine switch off and close the
driver’s door.
The engine switch was turned off while the
driver’s door was open.Close the
driver’s door.

1344-2. Driving procedures
4-2.Driving procedures
1Check that the parking brake is set.
2 Check that the shift lever is in P.
3 Firmly depress the brake pedal.
and a message will be displayed on
the multi-information display.
If it is not displayed, the engine cannot be
started.
4 Press the engine switch shortly and
firmly.
When operating the engine switch, one
short, firm press is enough. It is not neces-
sary to press and hold the switch.
The engine will crank until it starts or for up
to 30 seconds, whichever is less.
Continue depressing the brake pedal until
the engine is completely started.
The engine can be started from any engine
switch mode.
■If the engine does not start
●Check that the shift leve r is securely set in
P. The engine may not start if the shift
lever is displaced out of P.
●The engine immobilizer system may not
have been deactivated. ( P.60)
Contact your Lexus dealer.
■Electronic key battery depletion
 P.88
■Conditions affecting operation
 P.100
■Notes for the entry function
 P.101
■Steering lock function
●After turning the engine switch off and
opening and closing the doors, the steer-
ing wheel will be lock ed due to the steer-
ing lock function. Operating the engine
switch again automatically cancels the
steering lock.
●When the steering lock cannot be
released, “Push Engine Switch while
Turning Steering Whee l in Either Direc-
tion” will be displayed on the multi-infor-
mation display.
Check that the shift lever is in P. Press the
engine switch while turning the steering
wheel left and right.
●To prevent the steering lock motor from
overheating, operation of the motor may
be suspended if the engine is turned on
and off repeatedly in a short period of
time. In this case, refrain from operating
the engine switch. After about 10 sec-
onds, the steering lock motor will resume
functioning.
■When “Access System with Elec. Key
Malfunction See Owner's Manual” is
displayed on the multi-information dis-
play
The system may be ma lfunctioning. Have
the vehicle inspected by your Lexus dealer
immediately.
Engine (ignition) switch
Performing the following opera-
tions when carryin g the electronic
key on your person starts the
engine or changes engine switch
modes.
Starting the engine

3577-2. Steps to take in an emergency
7
When trouble arises
One of the following may be the cause
of the problem:
There may not be sufficient fuel in
the vehicle’s tank.
Refuel the vehicle.
 The engine may be flooded.
Try to restart the engine again fol-
lowing correct starting procedures.
( P.134)
 There may be a malfunction in the
engine immobilizer system.
( P.60)
One of the following may be the cause
of the problem:
 The battery may be discharged.
( P.361)
 The battery terminal connections
may be loose or corroded.
( P.301) The engine starting system may be
malfunctioning due to an electrical
problem such as electronic key battery
depletion or a blown fuse. However, an
interim measure is available to start the
engine. (
P.357)
One of the following may be the cause
of the problem:
 One or both of the battery terminals
may be disconnected. ( P.301)
 The battery may be discharged.
( P.361)
 There may be a malfunction in the
steering lock system.
Contact your Lexus dealer if the problem
cannot be repaired, or if repair procedures
are unknown.
When the engine does not start, the
following steps can be used as an
interim measure to start the engine if
the engine switch is functioning nor-
mally:
1 Push the parking brake switch to
check that the parking brake is set.
(P.143)
Parking brake indicator will come on.
If the engine will not start
If the engine will not start even
though correct starting procedures
are being followed ( P.134), con-
sider each of the following points:
The engine will not start even
though the starter motor oper-
ates normally.
The starter motor turns over
slowly, the interior lights and
headlights are dim, or the horn
does not sound or sounds at a low
volume.
The starter motor does not turn
over
The starter motor does not turn
over, the interior lights and head-
lights do not turn on, or the horn
does not sound.
Starting the engine in an emer-
gency

424Alphabetical Index
Hood................................................................ 293
How to start the engine............................134
Identification number ............................... 373
If the engine will not start ....................... 357
If your vehicle has to be stopped in an
emergency ................................................ 328
Ignition switch (engine switch) ............. 134
Overheating.................................................365
Tachometer ............................................... 71, 72
Engine coolant Capacity ......................................................... 376
Checking .......................................................298
Preparing and checking before winter......................................................................... 243
Engine coolant temperature gauge . 71, 72
Engine immobilizer system ........................ 60
Engine oil Capacity ......................................................... 374
Checking ....................................................... 296
Preparing and checking before winter......................................................................... 243
Warning light ...............................................338
Engine oil maintenance data .................. 298
Engine oil pressure gauge .......................... 80
Engine oil temperature gauge .................. 80
Engine switch ..................................................134 Auto power off function ...........................136
Changing the engine switch modes..136
If your vehicle has to be stopped in an
emergency ................................................ 328
Enhanced Vehicle Stability Control (Enhanced VSC) ...................................... 238
Enhanced VSC (Enhanced Vehicle Stabil- ity Control) .................................................. 238
EPS (Electric Power Steering) .............. 238 Warning light ...............................................340
Event data recorder (EDR) ............................7
F
First-aid kit storage belt ............................ 268
Flat tire Tire pressure warning system ............ 305 Vehicles with a spare tire.......................349
Floor mats ...........................................................22
Fluid Automatic transmission .......................... 377
Brake ................................................................378
Washer ...........................................................302
Footwell lights ............................................... 263 Wattage ........................................................... 381
Front passenger occupant classification system .............................................................. 36
Front seats Adjustment ..................................................... 106
Cleaning .........................................................283
Correct driving posture ............................ 23
Driving position memory ........................ 108
Head restraints................................................. 111
Memory recall function............................ 109
Power easy access system .................... 108
Seat heaters ....................................................261
Seat position memory ..............................108
Seat ventilators ..............................................261
Front side marker light Light switch .................................................... 149
Replacing light bulbs ................................ 322
Front turn signal lights Replacing light bulbs .................... 322, 323
Turn signal lever ...........................................142
Wattage ........................................................... 381
Fuel Capacity ......................................................... 374
Fuel gauge ..................................................71, 72
Fuel pump shut off system.....................336
Information ....................................................382
Refueling............................................................ 161
Type .................................................................. 374
Warning light .............................................. 340
Fuel consumption Average fuel economy .............................. 79
Current fuel consumption ........................ 79
Fuel filler door If the fuel filler do or cannot be opened
......................................................................... 359