2018 Lexus IS300 ignition

5748-2. Steps to take in an emergency
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Maintain the engine speed of the second vehicle and start the engine of your
vehicle by turning the engine switch to IGNITION ON mode.
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 vehicle inspected at your Lexus dealer as soon
as possible.
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■To prevent battery discharge
●Turn off the headlights and the audio system while the engine is off.
●Turn off any unnecessary electrical components 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 disc harge gradually even when the vehicle is not
in use, due to natural discharge and the draini ng effects of certain electrical appliances. 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 battery
●In some cases, it may not be possible to un lock 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.
●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 discharged.
Before disconnecting the battery, 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.
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7

5909-1. Specifications
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
*: The fluid capacity is a reference quantity.
If replacement is necessary, contact your Lexus dealer.
Cooling system
Capacity*
IS350 AWD/
IS350/IS300
AWD 9.9 qt. (9.4 L, 8.3 Imp. qt.)
IS300
Engine
8.2 qt. (7.8 L, 6.9 Imp. qt.)
Intercooler
3.2 qt. (3.0 L, 2.6 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 organic acid tech-
nology
Do not use plain water alone.
Ignition system (Spark plug)
IS350 AWD/IS350/ IS300 AWDIS300
Make DENSO FK20HBR8 NGK 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.

6199-2. Customization
9
Vehicle specifications
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
■Vehicle customization
●When the smart access system with push-button start is off, the entry unlock function
cannot be customized.
●When the doors remain closed after unlocking the doors and the timer activated auto-
matic door lock function activates, signals will be generated in accordance with the
operation buzzer volume and operational si gnal (Emergency flashers) function set-
tings.
●Some settings can be changed using a switch or the audio system screen. If a setting is
changed using a switch , the changed setting will not be reflected on the audio system
screen until the engine switch is turn ed off and then to IGNITION ON mode.
WARNING
■During customization
As the engine needs to be running during customization, ensure that the vehicle is
parked in a place with adequate ventilation. In a closed area such as a garage, exhaust
gases including harmful 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 fea-
tures.

634
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
What to do if... (Troubleshooting)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, ne
w genuine mechanical keys can be made
by your Lexus dealer. ( →P. 112)
●If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact your Lexus dealer immediately. (→ P. 115)
●Is the electronic key battery weak or depleted? ( →P. 500)
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. (→P. 179)
●Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the electronic key on your
person.
●The function may not operate properly du e to the condition of the radio wave.
(→ P. 129)
●Is the child-protector lock set?
The rear door cannot be opened from in side the vehicle when the lock is set.
Open the rear door from outside and then unlock the child-protector lock.
(→ P. 119)
If you have a problem, check the foll owing before contacting your Lexus
dealer.
The doors cannot be locked, unlocked, opened or closed
You lose your keys
The doors cannot be locked or unlocked
The rear door cannot be opened

635What to do if... (Troubleshooting)
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
●The function to prevent the electronic 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. 124)
●Did you press the engine switch while firmly depressing the brake pedal?
(→ P. 178)
●Is the shift lever in P? ( →P. 180)
●Is the electronic key anywhere detectable inside the vehicle? ( →P. 127)
●Is the steering wheel unlocked? (→ P. 180)
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way. (→P. 570)
●Is the battery discharged? ( →P. 572)
●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. 188)
●It is locked automatically to prevent theft of the vehicle. ( →P. 180)
The trunk lid is closed with the electronic key left inside
If you think something is wrong
The engine does not start
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

636What to do if... (Troubleshooting)
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
●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. 154)
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or IGNITION ON mode (the engine is not running) for a period of
time. ( →P. 180)
●The seat belt reminder light is flashing
Are the driver and the front passe nger wearing the seat belts? (→P. 524)
●The parking brake indicator is on
Is the parking brake released? ( →P. 192)
Depending on the situation, other types of warning buzzer may also sound.
(→ P. 522, 529)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. (→ P. 71)
Do one of the following to de activate or stop the alarms:
• Unlock the doors or open the trunk.
• Turn the engine switch to ACCESSOR Y or IGNITION ON mode, or start
the engine. 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

643Alphabetical index
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
E-mail........................................................... 371
Eco drive mode .....................................288
Eco Driving Indicator............................. 101
EDR (Event data recorder) ...................10
Elapsed time ............................................ 104
Electric Power Steering (EPS) ....... 293
Warning light .......................................523
Electronic key ........................................... 110 Battery-saving function .................... 128
If the electronic key does not operate properly............................ 569
Replacing the battery ...................... 500
Emergency, in case of If a warning message is displayed ........................................529
If the electronic key does not operate properly ....... 569
If the engine will not start................567
If the vehicle battery is discharged ......................................... 572
If the warning buzzer sounds.................................................. 522
If the warning light turns on........... 522
If you have a flat tire ......................... 556
If you think something is wrong.............................................. 520
If your vehicle becomes stuck ..................................................... 580
If your vehicle has to be stopped in an emergency ........... 513
If your vehicle needs to be towed ........................................ 514
If your vehicle overheats ................576 Emergency flashers .............................. 512
Engine ....................................................... 587
ACCESSORY mode ....................... 179
Compartment ....................................... 471
Engine switch ........................................178
Hood........................................................468
How to start the engine....................178
Identification number...................... 586
If the engine will not start ............... 567
Ignition switch (engine switch) .....178
Overheating......................................... 576
Engine coolant ....................................... 476 Capacity................................................ 590
Checking ............................................... 476
Preparing and checking before winter .................................... 297
Engine coolant temperature gauge .......................................................... 81
Engine immobilizer system ................. 68
Engine oil ..................................................473 Capacity................................................ 588
Checking ............................................... 473
Preparing and checking before winter .................................... 297
Engine oil maintenance data ............475
Engine switch ........................................... 178
Enhanced VSC ......................................292
EPS (Electronic Power Steering) ........ 293 Warning light ....................................... 523
Event data recorder (EDR)................... 10
E

645Alphabetical index
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Hands-free system
(for cellular phone) ........................... 363
HD Radio
® system .............................. 330
Head restraints ........................................144
Headlights .................................................194 AFS (Adaptive Front-lighting System) ................................................. 195
Light switch ............................................ 194
Replacing light bulbs ....................... 509
Headlights cleaner............................... 202
Heaters Air conditioning system ..................407
Heated steering wheel ..................... 416
Outside rear view mirrors ...............412
Seat heaters ............................................417
Hill-start assist control ........................ 292
Hood .......................................................... 468 Open ....................................................... 468
Hooks Cargo hooks ........................................425
Coat hooks ............................................ 431
Retaining hooks (floor mat) ............. 26
Horn ............................................................ 148 I/M test ..................................................... 465
Identification
Engine .................................................... 586
Vehicle ................................................... 585
Ignition switch (engine switch) ......... 178
Illuminated entry system ..................... 419
Immobilizer system ................................ 68
Indicators .....................................................78
Initialization Engine oil maintenance data ....... 475
Maintenance ........................................460
Moon roof .............................................. 160
Multi-information display.................. 95
Power windows................................... 155
Tire pressure warning system ...............................485
Initiators (tire pressure warning system) .................................. 491
Inside door handle lights ..................... 418
Inside rear view mirror......................... 149
Instrument panel light control ............ 84
Intercooler ...............................................478
Intercooler coolant............................... 476 Capacity................................................ 590
Checking ............................................... 476
Preparing and checking before winter .................................... 297
Interior lights ............................................ 419 Wattage .................................................595
Intuitive parking assist .......................... 251
HI