Page 583 of 628
5689-1. Specifications
IS300h_EE(OM53B95E)
*: The fluid capacity is a reference quantity.
If replacement is necessary, contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
Electrical system
12-volt battery
Open voltage at 20C
(68F):
12.5 V or higher: Fully charged
11.0 - 12.4 V: Half charged
10.9 V or lower: Discharged
(Check the voltage 20 minutes after the hybrid sys-
tem and all lights are turned off.)
Charging rates4 A — 5 A
Hybrid transmission
Fluid capacity*3.8 L (4.0 qt., 3.3 Imp. qt.)
Fluid typeToyota Genuine ATF WS
NOTICE
Hybrid transmission fluid type
Using transmission fluid other than “Toyota Genuine ATF WS” may cause
deterioration in shift quality, locking up of your transmission accompanied by
vibration, and ultimately damage the hybrid transmission of your vehicle.
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585
9 9-2. Customization
Vehicle specifications
IS300h_EE(OM53B95E)
Vehicle customization
When the speed-detecting automatic door lock and shift-linked automatic door
lock are both on, the door lock operates as follows.
• When shifting the shift lever to any position other than P, all the doors will
be locked.
• If the vehicle is started with all doors locked, the speed-detecting automatic
door lock will not operate.
• If the vehicle is started with any door unlocked, the speed-detecting auto-
matic door lock will operate.
When the smart entry & start system is off, the entry unlock function cannot be
customized.
When the doors remain closed after unlocking the doors and the timer activated
automatic door lock function activates, signals will be generated in accordance
with the operation buzzer volume and operational signal (Emergency flashers)
function settings.
When customizing using the Remote Touch or Lexus Display Audio controller
Stop the vehicle in a safe place, apply the parking brake, and shift the shift lever
to P. Also, to prevent 12-volt battery discharge, leave the hybrid system operating
while customizing the features.
CAUTION
During customization
As the hybrid system needs to be operating 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 col-
lect and enter the vehicle. This may lead to death or a serious health hazard.
NOTICE
During customization
To prevent 12-volt battery discharge, ensure that the hybrid system is operating
while customizing features.
Page 601 of 628
585
IS300h_EE(OM53B95E)
9
Vehicle specifications
9-3. Items to initialize
Items to initialize
The following item must be initialized for normal system operation after
such cases as the 12-volt battery being reconnected, or maintenance
being performed on the vehicle:
ItemWhen to initializeReference
Tire pressure warning system
• When rotating the tires
• When changing the tire infla-
tion pressure by changing
traveling speed or load
weight, etc.
P. 452
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588
IS300h_EE(OM53B95E)What to do if... (Troubleshooting)
What to do if... (Troubleshooting)
If you lose your mechanical keys, new genuine mechanical keys can be
made by any authorized Lexus dealer or repairer, or another duly qual-
ified and equipped professional. (P. 132)
If you lose your electronic keys, the risk of vehicle theft increases sig-
nificantly. Contact any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional immediately. (P. 135)
Is the electronic key battery weak or depleted? (P. 472)
Is the power switch in ON mode?
When locking the doors, turn the power switch off. (P. 210)
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 due to the condition of the radio
wave. (P. 151)
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-pro-
tector lock. (P. 1 4 0 )
If you have a problem, check the following before contacting any autho-
rized Lexus dealer or repairer, or another duly qualified and equipped
professional.
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
Page 605 of 628

589What to do if... (Troubleshooting)
IS300h_EE(OM53B95E)
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. 146)
Did you press the power switch while firmly depressing the brake
pedal?
(P. 209)
Is the shift lever in P? (P. 2 1 1 )
Is the electronic key anywhere detectable inside the vehicle? (P. 149)
Is the steering wheel unlocked? (P. 212)
Is the electronic key battery weak or depleted?
In this case, the hybrid system can be started in a temporary way. (P.
550)
Is the 12-volt battery discharged? (P. 551)
Is the power switch in ON mode?
If you cannot release the shift lever by depressing the brake pedal with
the power switch in ON mode. (P. 548)
It is locked automatically to prevent theft of the vehicle. (P. 212) The trunk lid is closed with the electronic key left inside
If you think something is wrong
The hybrid system 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 hybrid system is
stopped
Page 609 of 628

593Alphabetical index
IS300h_EE(OM53B95E)
Anti-lock Brake System (ABS) .293
Function ................................293
Warning light........................508
Approach warning .....................254
Armrest ......................................422
ASC (Active Sound Control) ....225
Assist grips ................................424
Audio input................................323
Audio system .............................316
Audio CD player ..................341
Audio input ...........................323
AUX port/
USB port ............................323
Bluetooth
® audio ..................365
iPod.......................................348
Optimal use...........................331
Portable music player ...........356
Radio ....................................339
Steering wheel audio switch .322
USB memory ........................351
Automatic headlight leveling
system ....................................228
Warning light........................509
Automatic High Beam ..............229
Automatic light control system 226
AUX port ...................................323
Average fuel economy ..............117
Average vehicle speed...............117Back-up light
Replacing light bulb............. 488
Wattage ................................ 572
Battery (12-volt battery) ........... 447
If the 12-volt battery is
discharged ......................... 551
Preparing and checking
before winter ..................... 311
Warning light ....................... 507
Battery (traction battery) ............ 83
Blind Spot Monitor (BSM) ...... 309
Blower customization ............... 405
Bluetooth®
Audio system ....................... 365
Hands-free system
(for cellular phone)............ 367
Bottle holders ........................... 415
Brake
Fluid ..................................... 569
Parking brake ....................... 224
Regenerative braking ............. 81
Warning light ....................... 507
Brake assist .............................. 293
Break-in tips ............................ 193
Brightness control
Instrument panel light control....
113
BSM (Blind Spot Monitor)....... 309
B
Page 610 of 628

594Alphabetical index
IS300h_EE(OM53B95E)
Card key ....................................130
Care ...................................426, 430
Aluminum wheels.................427
Exterior .................................426
Interior ..................................430
Seat belts...............................431
Cargo hooks ..............................417
Caution label ...............................83
CD player ..................................341
Chains ........................................312
Child restraint system ..................61
Baby seats, definition .............62
Baby seats, installation ...........71
Child seats, definition .............62
Child seats, installation...........71
Installing CRS with ISOFIX
rigid anchors.........................74
Installing CRS with seat belts 71
Installing CRS with top strap .75
Junior seats, definition ............62
Junior seats, installation .........73Child safety................................. 60
12-volt battery
precautions ................ 449, 554
Airbag precautions................. 45
Child restraint system ............ 61
How your child should
wear the seat belt ................. 40
Installing child restraints ....... 70
Moon roof precautions......... 190
Power window lock switch .. 184
Power window precautions.. 186
Rear door child-protectors ... 140
Removed electronic key
battery precautions ............ 474
Seat belt precautions .............. 42
Seat heater precautions ........ 409
Trunk precautions ............... 147
Child-protectors ....................... 140
Cleaning............................ 426, 430
Aluminum wheels ................ 427
Exterior ................................ 426
Interior ................................. 430
Seat belts .............................. 431
C
Page 612 of 628

596Alphabetical index
IS300h_EE(OM53B95E)
Doors .........................................136
Automatic door locking and
unlocking system................140
Door glasses .........................184
Door lock ..............................139
Open door warning buzzer ...137
Open door warning
light ....................................509
Outside rear view mirrors .....180
Rear door child-protector ....140
Drive information ......................117
Drive info 1/Drive info 2...........118
Driver’s and front passenger’s
seat belt reminder light ...........509
Driver’s seat position memory ..168
Driving ......................................192
Break-in tips .........................193
Correct driving posture ...........36
Driving mode select switch ..290
Hybrid vehicle driving tips ...309
Procedures ............................192
Winter drive tips ...................311
Dynamic radar cruise control ....249E-mail ....................................... 375
Eco drive mode......................... 290
Elapsed time ............................. 117
Electric motor (traction motor)... 79
Electric Power Steering (EPS) . 293
Function ............................... 293
Warning light ....................... 508
Electronic key ........................... 130
Battery-saving function ....... 150
If the electronic key does not
operate properly ................ 549
Replacing the battery ........... 472
Emergency, in case of
If the 12-volt battery is
discharged ......................... 551
If the electronic key does not
operate properly ................ 549
If the hybrid system will not
start .................................... 546
If the shift lever cannot be
shifted from P .................... 548
If the warning buzzer sounds507
If the warning light turns on 507
If the warning message is
displayed ........................... 514E