Page 567 of 628

5538-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53B95E)
Once the hybrid system has started, remove the jumper cables in the
exact reverse order from which they were connected.
Once the hybrid system starts, have the vehicle inspected at any autho-
rized Lexus dealer or repairer, or another duly qualified and equipped
professional as soon as possible.
Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
To prevent 12-volt battery discharge
Turn off the headlights and the audio system while the hybrid system 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 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when
the vehicle is not in use, due to natural discharge and the draining effects of cer-
tain electrical appliances. If the vehicle is left for a long time, the 12-volt battery
may discharge, and the hybrid system may be unable to start. (The 12-volt bat-
tery recharges automatically while the hybrid system is operating.)
When recharging or replacing the 12-volt battery
For vehicles with an alarm: Make sure that the key is not inside the vehicle
when recharging or replacing the 12-volt battery. The key may be locked in the
vehicle if the alarm is activated. (P. 98)
In some cases, it may not be possible to unlock the doors using the smart entry
& start system when the 12-volt battery is discharged. Use the wireless remote
control or the mechanical key to lock or unlock the doors.
The hybrid system may not start on the first attempt after the 12-volt battery has
recharged but will start normally after the second attempt. This is not a mal-
function.
The power switch mode is memorized by the vehicle. When the 12-volt battery
is reconnected, the system will return to the mode it was in before the 12-volt
battery was discharged. Before disconnecting the 12-volt battery, turn the
power switch off.
If you are unsure what mode the power switch was in before the 12-volt battery
discharged, be especially careful when reconnecting the 12-volt battery.
8
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.
Page 587 of 628
5729-1. Specifications
IS300h_EE(OM53B95E)
Light bulbs*1
Light bulbsWType
Exterior
Discharge headlights*235A
Front fog lights (except F SPORT mod-
els)*219B
Front turn signal lights21C
Rear turn signal lights21C
Back-up lights16D
Outer foot lights5D
Interior
Door courtesy lights5D
Vanity lights8D
Interior light8D
Personal lights8D
Footwell lights3.8D
Trunk light*25D
A: D4S discharge bulbs
B: H16 halogen bulbs
C: Wedge base bulbs (amber)
D: Wedge base bulbs (clear)
*1: Light bulbs not listed in this table are LED bulbs.
*2: If equipped
Page 597 of 628

5829-2. Customization
IS300h_EE(OM53B95E)
Turn signal lever (P. 222)
*1: After flashing the turn signal lights when turning left or right while this func-
tion is off and the turn signal lever is moved to the first position in the direc-
tion of the flashing light, the turn signal lights can be selected to be flashing or
off.
*2: The turn signal lights keep flashing if the turn signal lever is moved to the first
position in the direction of flashing light.
*3: The turn signal lights will be off if the turn signal lever is moved to the first
position in the direction of flashing light.
Automatic light control system (P. 226)
FunctionDefault set-
tingCustomized set-
ting
The number of times the
turn signal lights flash
automatically when the
turn signal lever is moved
to the first position during
a lane change
*1
3
5
———O7
Off *2
Off*3
1234
FunctionDefault set-
tingCustomized set-
ting
Light sensor sensitivityStandard-2 to 2O—OO
Time elapsed before
headlights automatically
turn off
30 seconds
60 seconds
———O90 seconds
120 seconds
Welcome light illumina-
tion controlOnOff———O
1234
Page 599 of 628
5849-2. Customization
IS300h_EE(OM53B95E)
Illumination (P. 4 1 1 )
FunctionDefault set-
tingCustomized set-
ting
Time elapsed before the
interior lights turn off15 seconds
Off
O—OO7.5 seconds
30 seconds
Operation after the power
switch is turned offOnOff———O
Operation when the doors
are unlockedOnOff———O
Operation when you
approach the vehicle with
the electronic key on your
person
OnOff———O
Inside door handle lightsOnOff———O
Time elapsed before the
outer foot lights turn off15 seconds
Off
O—OO7.5 seconds
30 seconds
Operation of the outer
foot lights when you
approach the vehicle with
the electronic key on your
person
OnOff———O
Operation of the outer
foot lights when the doors
are unlocked with the
power door lock switch
OnOff———O
1234
Page 611 of 628

595Alphabetical index
IS300h_EE(OM53B95E)
Clock .........................................420
Coat hooks .................................424
Condenser .................................446
Console box ...............................414
Coolant ......................................444
Capacity ................................567
Checking ...............................444
Preparing and checking
before winter ......................311
Cooling system ..........................444
Engine overheating ...............556
Hybrid system overheating ...556
Cruise control
Cruise control .......................245
Dynamic radar cruise control .....
249
Cup holders ...............................415
Current fuel consumption ..........117
Curtain shield airbags .................43
Customizable features ...............576DAB (Digital Audio Broadcast)339
Daytime running light system . 227
Defogger
Front windshield .................. 404
Outside rear view mirrors .... 404
Rear window ........................ 404
Differential ............................... 569
Digital Audio Broadcast (DAB)339
Dimensions ............................... 562
Display
Drive information ................ 117
Dynamic radar cruise control ....
249
LDA (Lane Departure Alert) 265
Multi-information display.... 116
Warning message................. 514
Distance .................................... 118
Do-it-yourself maintenance ...... 435
Door courtesy lights
Location ............................... 411
Wattage ................................ 572
Door lock
Doors ................................... 136
Smart entry & start system .. 149
Wireless remote control ....... 130D
Page 614 of 628

598Alphabetical index
IS300h_EE(OM53B95E)
First-aid kit storage belt ............417
Flat tire
Vehicles with emergency
tire puncture repair kit ........531
Vehicles with run-flat tires ...545
Floor mats....................................34
Fluid
Brake ....................................569
Hybrid
transmission .......................568
Washer ..................................446
Fog lights ...................................233
Replacing light bulbs ....481, 493
Switch ...................................233
Wattage .................................572
Follow me home system............227
Footwell light ............................411
Wattage .................................572
Front fog lights ..........................233
Replacing light bulbs ....481, 493
Switch ...................................233
Wattage .................................572Front personal lights ................. 412
Wattage ................................ 572
Front position lights.................. 226
Light switch ......................... 226
Replacing light bulbs ........... 493
Front seats................................. 164
Adjustment........................... 164
Cleaning ............................... 430
Correct driving posture .......... 36
Driving position memory..... 168
Head restraints ..................... 173
Power easy access system.... 170
Seat heaters .......................... 410
Seat position memory .......... 168
Seat ventilators .................... 410
Front turn signal lights ............. 222
Replacing light bulbs ... 483, 485
Turn signal lever .................. 222
Wattage ................................ 572
F
Page 615 of 628

599Alphabetical index
IS300h_EE(OM53B95E)
Fuel ............................................241
Capacity ................................564
Fuel gauge ............................110
Information ...........................573
Refueling ..............................241
Type ..............................241, 564
Warning light........................509
Fuel consumption ......................125
Average fuel economy..........117
Current fuel consumption .....117
Fuel filler door...........................241
If the fuel filler door
cannot be opened................243
Refueling ..............................241
Fuel gauge .................................110
Fuses ..........................................475
Gauges .......................................110
Glove box ..................................414
Glove box light ..........................414Hands-free system
(for cellular phone) ................ 367
Head restraints .......................... 173
Headlight cleaner...................... 235
Headlights................................. 226
Automatic High Beam
system................................ 229
Discharge headlights
precautions ........................ 494
Follow me home system ...... 227
Light switch ......................... 226
Replacing light bulbs ........... 493
Wattage ................................ 572
Heaters ...................................... 398
Air conditioning system....... 398
Heated steering wheel.......... 409
Outside rear view mirrors .... 404
Seat heaters .......................... 410
Hill-start assist control.............. 293
High-voltage components........... 83
Hood ......................................... 437
Open..................................... 437
Pop Up Hood ......................... 56
G
H