battery LEXUS IS300 2021 Workshop Manual

3637-2. Steps to take in an emergency
7
When trouble arises
IS300Positive (+) battery terminal (your vehicle)
Positive (+) battery terminal (second vehicle)
Negative (-) battery terminal (second vehicle)
Solid, stationary, unpainted metallic poin t away from the battery and any mov-
ing parts as shown in the illustration
4 Start the engine of the second vehi-
cle. Increase the engine speed
slightly and maintain at that level for
approximately 5 minutes to
recharge the battery of your vehi-
cle.
5 Open and close any of the doors of
your vehicle with the engine switch
off.
6 Maintain the engine speed of the
second vehicle and start the engine
of your vehicle by turning the
engine switch to IGNITION ON
mode.
7 Once the vehicle’s engine has
started, remove the jumper cables
in the exact reverse order from
which they were connected.
Once the engine starts, have the vehi-
cle inspected at your Lexus dealer as
soon as possible.
■Starting the engine when the battery is
discharged
The engine cannot be started by push-start-
ing.
■To prevent battery discharge
●Turn off the headlights and the audio sys-
tem while the engine is off.
●Turn off any unnecessary electrical com-
ponents when the vehicle is running at a
low speed for an extended period, such
as in heavy traffic.
■Charging the battery
The electricity stored in the battery will dis-
charge gradually even when the vehicle is
not in use, due to natural discharge and the
draining effects of certain electrical appli-
ances. If the vehicle is left for a long time,
the battery may discharge, and the engine
may be unable to start. (The battery
recharges automatically during driving.)
■When recharging or replacing the bat-
tery
●In some cases, it may not be possible to
unlock the doors using the smart access
system with push-button start when the
battery is discharged. Use the wireless
remote control or the mechanical key to
lock or unlock the doors.
A
B
C
D

3647-2. Steps to take in an emergency
●The engine may not start on the first
attempt after the battery has recharged
but will start normally after the second
attempt. This is not a malfunction.
●The engine switch mode is memorized by
the vehicle. When the battery is recon-
nected, the system will return to the
mode it was in before the battery was dis-
charged. Before di sconnecting the bat-
tery, turn the engine switch off. If you are
unsure what mode the engine switch was
in before the battery discharged, be
especially careful when reconnecting the
battery.
WARNING
■Avoiding battery fires or explosions
Observe the following precautions to
prevent accidentally igniting the flamma-
ble gas that may be emitted from the bat-
tery:
●Make sure each jumper cable is con-
nected to the correct terminal and that
it is not unintentiona lly in contact with
any other than the intended terminal.
●Do not allow the other end of the
jumper cable connected to the “+” ter-
minal to come into contact with any
other parts or metal surfaces in the
area, such as brackets or unpainted
metal.
●Do not allow the + and - clamps of the
jumper cables to come into contact
with each other.
●Do not smoke, use matches, cigarette
lighters or allow open flame near the
battery.
■Battery precautions
The battery contains poisonous and cor-
rosive acidic electrolyte, while related
parts contain lead and lead compounds.
Observe the following precautions when
handling the battery:
●When working with the battery, always
wear safety glasses and take care not
to allow any battery fluids (acid) to
come into contact with skin, clothing
or the vehicle body.
●Do not lean over the battery.
●In the event that battery fluid comes
into contact with the skin or eyes,
immediately wash the affected area
with water and seek medical attention.
Place a wet sponge or cloth over the
affected area until medical attention
can be received.
●Always wash your ha nds after handling
the battery support, terminals, and
other battery-related parts.
●Do not allow children near the battery.
NOTICE
■When handling jumper cables
When connecting the jumper cables,
ensure that they do not become entan-
gled in the cooling fans or engine drive
belt.

3768-1. Specifications
*: The fluid capacity is a reference quantity.If replacement is necessary, contact your Lexus dealer.
Cooling system
Capacity*
IS350
AWD/IS350
/IS300 AWD
9.8 qt. (9.3 L, 8.2 Imp. qt.)
IS300
Engine
9.1 qt. (8.6 L, 7.6 Imp. qt.)
Intercooler
3.0 qt. (2.8 L, 2.5 Imp. qt.)
Coolant type
Use either of the following:
 “Toyota Super Long Life Coolant”
 Similar high-quality ethylene glycol-based non-silicate,
non-amine, non-nitrite, and non-borate coolant with
long-life hybrid orga nic acid technology
Do not use plain water alone.
Ignition system (spark plug)
IS350 AWD/IS350/IS300 AWDIS300
MakeDENSO FK20HBR8NGK DILFR7K9G
Gap0.031 in. (0.8 mm)0.035 in. (0.9 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
Electrical system (battery)
Open voltage at 68°F (20°C):
12.3 V or higher
(Check the voltage 20 minutes after the engine
and all lights are turned off.)
If the voltage is lower than the standard value,
charge the battery.
Charging rates5 A max.

3898-1. Specifications
8
Vehicle specifications
Maximum loaded vehicle weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight
150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1
* that fol-
lows
Occupant distributionDistribution of occupants in a vehicle as specified in
the third column of Table 1
* below
Production options weight
The combined weight of installed regular produc-
tion options weighing over 5 lb. (2.3 kg) in excess of
the standard items which they replace, not previ-
ously considered in curb weight or accessory
weight, including heavy duty brakes, ride levelers,
roof rack, heavy duty battery, and special trim
RimA metal support for a tire or a tire and tube assem-
bly upon which the tire beads are seated
Rim diameter (Wheel diameter)Nominal diameter of the bead seat
Rim size designationRim diameter and width
Rim type designationThe industry manufacturer’s designation for a rim
by style or code
Rim widthNominal distance between rim flanges
Vehicle capacity weight (Total load
capacity)The rated cargo and luggage load plus 150 lb. (68
kg) times the vehicle’s designated seating capacity
Vehicle maximum load on the tire
The load on an individual ti re that is determined by
distributing to each axle its share of the maximum
loaded vehicle weight, and dividing by two
Vehicle normal load on the tire
The load on an individual ti re that is determined by
distributing to each axle its share of curb weight,
accessory weight, and normal occupant weight
(distributed in accor dance with Table 1
* below), and
dividing by two
Weather sideThe surface area of the rim not covered by the
inflated tire
Tire related termMeaning

3948-2. Customization
8-2.Customization
■Changing by using the meter con-
trol switches
1 Press or to select .
2 Operate the switches to select a
desired item.
3 Change the setting by referring to
the message displayed on the
screen.
■Changing by using the Remote
Touch
1 Press the “MENU” button on the
Remote Touch.
2 Select “Setup” on the menu screen
and select “Vehicle”.
3 Select “Vehicle Customization” or
“Drive Mode Customization”.
Various setting can be changed. Refer to
the list of settings th at can be changed for
details.
This system can also be operated by the
touch screen.
For details on the Remote Touch, refer
to the “NAVIGATION AND MULTI-
MEDIA SYSTEM OWNER’S MAN-
UAL”.
■When customizing using the Remote
Touch
Stop the vehicle in a safe place, apply the
parking brake, and shift the shift lever to P.
Also, to prevent battery discharge, leave
the engine running while customizing the
features.
Some function settings are changed simultaneously with other functions being cus-
tomized. Contact your Lexus dealer for further details.
Settings that can be changed using the Remote Touch
Settings that can be changed using the meter control switches
Settings that can be changed by your Lexus dealer
Customizable features
Your vehicle includes a variety of
electronic features that can be per-
sonalized to suit your preferences.
The settings of these features can
be changed by using the meter con-
trol switches, the Remote Touch, or
at your Lexus dealer.
Customizing vehicle features
WARNING
■During customization
As the engine needs to be running
during customization, ensure that the
vehicle is parked in a place with ade-
quate ventilation. In a closed area such as
a garage, exhaust gases including harm-
ful carbon monoxide (CO) may collect
and enter the vehicle. This may lead to
death or a serious health hazard.
NOTICE
■During customization
To prevent battery discharge, ensure that
the engine is running while customizing
features.
Customizable features
A
B
C

4048-3. 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 reconnected, 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.225
Intuitive parking assist*• After reconnecting or changing the batteryP.212
Message indicating
maintenance is
required
• After the maintenance is performedP.286
Oil maintenance• After the maintenance is performedP.298
Tire pressure warning
system
• When rotating the tires
• When the tire inflation pressure is
changed such as when changing trav-
eling speed or load weight
• When changing the tire size
P.308
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”.

418What to do if... (Troubleshooting)
1-1.What to do if... (Troubleshooting)What to do if... (Troubleshooting)
If you lose your mechanical keys,
new genuine mechanical keys can
be made by your Lexus dealer.
( P.358)
 If you lose your electronic keys, the
risk of vehicle theft increases signifi-
cantly. Contact your Lexus dealer
immediately. ( P.358)
 Is the electronic key battery weak or
depleted? ( P.316)
 Is the engine switch in IGNITION
ON mode?
When locking the doors, turn the engine
switch off. ( P.136)
 Is the electronic key left inside the
vehicle?
When locking the doors, make sure that
you have the electronic key on your per-
son.
The function may not operate prop-
erly due to the condition of the radio
wave. ( P.100)
 Is the child-protector lock set?
The rear door cannot be opened from
inside the vehicle when the lock is set.
Open the rear door from outside and then
unlock the child-protector lock. ( P.94)
 The function to prevent the elec-
tronic key from being left inside the
trunk will operate and you can open
the trunk as usual. Take the key out
from the trunk. ( P.97)
 Did you press the engine switch
while firmly depressing the brake
pedal? ( P.134)
 Is the shift lever in P? ( P.134)
 Is the electronic key anywhere
detectable inside the vehicle?
( P.99)
 Is the steering wheel unlocked?
( P.134)
 Is the electronic key battery weak or
If you have a problem, check the
following before contacting your
Lexus dealer.
The doors cannot be locked,
unlocked, opened or closed
You lose your keys
The electronic key does not
operate properly
The doors cannot be locked or
unlocked
The rear door cannot be opened
The trunk lid is closed with the
electronic key left inside
If you think something is wrong
The engine does not start

419What to do if... (Troubleshooting)
depleted?
In this case, the engine can be started in a
temporary way. (P.360)
Is the battery discharged? ( P.361)
 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.139)
 It is locked automatically to prevent
theft of the vehicle. ( P.134)
 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.119)
 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.136) 
The seat belt reminder light is flash-
ing
Are the driver and the front passenger
wearing the seat belts? ( P.340)
 The parking brake indicator is on
Is the parking brake released? ( P.143)
Depending on the situation, other
types of warning buzzer may also
sound. ( P.337, 346)
 Did anyone inside the vehicle open
a door during setting the alarm?
The sensor detects it and the alarm sounds.
( P.62)
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-
tion display. ( P.346)
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

421Alphabetical Index
Alphabetical Index
A
A/CAir conditioning filter .................................315
Automatic air conditioning system ... 253
Micro dust and pollen filter...................258
ABS (Anti-lock Brake System).............. 238 Warning light ............................................... 339
ACA (Active Cornering Assist) ........... 238
Active Cornering Assist (ACA) ........... 238
Active Sound Control (ASC) .................. 147
Adaptive Variable Suspension system238
AHB (Automatic High Beam) .................. 151
Air conditioning filter ...................................315
Air conditioning system Air conditioning filter .................................315
Automatic air conditioning system ... 253
Micro dust and pollen filter...................258
Airbags Airbag operating conditions................... 30
Airbag precautions for your child ........ 33
Correct driving posture .............................23
Curtain shield airbag operating condi- tions .................................................................. 30
Curtain shield airbag precautions ....... 33
Front passenger occupant classification system ............................................................. 36
General airbag precautions ................... 33
Locations of airbags.................................... 28
Modification and disposal of airbags . 35
Side airbag operating conditions ......... 30
Side airbag precautions ............................ 33
Side and curtain shield airbags operating conditions...................................................... 30
Side and curtain shield airbags precau- tions .................................................................. 33
SRS airbags ..................................................... 28
SRS warning light ......................................338
Alarm ................................................................... 62 Warning buzzer ......................................... 337
Anchor brackets .......................................42, 51 Antennas (smart acc
ess system with
push-button start)........................................ 99
Anti-lock Brake System (ABS).............. 238 Warning light ...............................................339
Approach warning........................................ 197
Armrest............................................................ 270
ASC (Active Sound Control) .................. 147
Assist grips ..................................................... 270
Audio system-linked display ........................81
Automatic air conditioning system ...... 253
Automatic headlight leveling system ... 150
Automatic High Beam ................................. 151
Automatic light control system................149
Automatic transmission ............................. 138 M mode ............................................................. 141
Paddle shift switches .........................140, 141
Snow mode.................................................... 140
Average fuel economy..................................79
Average vehicle speed .................................79
B
Back-up lights Replacing light bulbs ................................ 322
Battery If the battery is discharged ..................... 361
Preparing and checking before winter.......................................................................... 243
Warning light .............................................. 338
Blind Spot Monitor (BSM)....................... 202
Boost gauge...................................................... 80
Brake Brake hold ...................................................... 146
Fluid......................................................300, 378
Parking brake ................................................143
Warning light ............................................... 337
Brake assist .................................................... 238
Break-in tips.....................................................125
Brightness control Instrument panel light control................. 75
BSM (Blind Spot Monitor)....................... 202

422Alphabetical Index
BuzzerHands off steering wheel warning (LTA).......................................................................... 188
C
Card key ............................................................ 88
Care Exterior ...........................................................280
Interior ............................................................. 283
Seat belts........................................................ 283
Wheels and wheel ornaments............280
Cargo capacity...............................................132
Cargo net ....................................................... 268
Center Display ............................................. 250
Chains .............................................................. 244
Child restraint system Fixed with a LATCH system .................. 49
Fixed with a seat belt................................... 45
Front passenger occupant 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 .................................. 364
Child restraint system..................................42
Heated steering wheel and seat heater precautions.................................................. 261
How your child should wear the seat belt ............................................................................ 25
Moon roof precautions ............................ 122
Power window lock switch...................... 119
Power window precautions .................... 119
Rear door child-protectors ..................... 94
Removed electronic key battery precau- tions ................................................................. 317
Seat belt extender precautions ............. 25
Seat belt precautions .................................... 41
Trunk precautions ........................................ 96 Child-protectors............................................. 94
Cleaning
Exterior........................................................... 280
Interior .............................................................283
Radar sensor ................................................. 164
Seat belts ........................................................283
Wheels and wheel ornaments ........... 280
Clock ..................................................71, 72, 270
Coat hooks..................................................... 270
Condenser .....................................................300
Console box ...................................................267
Consumption screen .................................... 83
Cooling system............................................. 298 Engine overheating.................................. 365
Cruise control Dynamic radar cruise control with full-speed range ........................................192
Cup holders ....................................................267
Current fuel consumption ...........................79
Curtain shield airbags .................................. 28
Customizable features .............................. 394
D
Daytime running light system ...................149
Defogger Outside rear view mirrors.....................255
Rear window ................................................255
Windshield ....................................................255
Differential Front differential oil............. ....................... 377
Rear differential oil......... ..................... ....... 377
Dimensions .................................................... 372
Dinghy towing.................................................133
Display Center Display ........................................... 250
Dynamic radar cruise control with full-speed range ........................................192
Intuitive parking assist ............................... 210
LTA (Lane Tracing Assist) ..................... 185
Multi-information display .......................... 76
RCTA.................................................................216
Warning message .....................................346