
621What to do if... (Troubleshooting)
RC300h_EE(OM24740E)
●Did you press the power switch while firmly depressing the brake pedal?
( P. 215)
●Is the shift lever in P? (P. 217)
●Is the electronic key anywhere detectable inside the vehicle? (P. 155)
●Is the steering wheel unlocked? (P. 217)
●Is the electronic key battery weak or depleted?
In this case, the hybrid system ca n be started in a temporary way. (P. 580)
●Is the 12-volt battery discharged? (P. 582)
●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. 227)
●It is locked automatically to prevent theft of the vehicle. (P. 217)
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

622What to do if... (Troubleshooting)
RC300h_EE(OM24740E)
●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. 196)
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or ON mode (the hybrid system is not operating) for a period of time.
( P. 217)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? ( P. 539)
●The parking brake indicator is on
Is the parking brake released? ( P. 230)
Depending on the situation, other types of warning buzzer may also sound.
( P. 537, 542)
●Did anyone inside the vehicle open a door or anything move inside the vehicle
during setting the alarm?
The sensor detects them and the alarm sounds. ( P. 102)
Do one of the following to deactivate or stop the alarm:
• Unlock the doors or open the trunk using the entry function or wireless remote con-
trol. • Start the hybrid system.
The windows do not open or close by operating the power window
switches
The power switch is turned off automatically
A warning buzzer sounds during driving
An alarm is activated and th e horn sounds (if equipped)

623What to do if... (Troubleshooting)
RC300h_EE(OM24740E)
●Is the message displayed on the multi-information display?
Check the message on the multi-information display. ( P. 542)
●When a warning light turns on or a warning message is displayed, refer to
P. 537, 542.
●Stop the vehicle in a safe place and repair the flat tire temporarily with the
emergency tire puncture repair kit. ( P. 563)
●Try the procedure for when the vehicle becomes stuck in mud, dirt, or snow.
( P. 592)
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message is displayed
When a problem has occurred
If you have a flat tire
The vehicle becomes stuck

627Alphabetical index
RC300h_EE(OM24740E)
Driver’s and front passenger’s
seat belt reminder light ..................539
Driver’s seat position memory ......... 183
Driving .......................................................206
Break-in tips ......................................... 207
Correct driving posture .................... 36
Driving mode select switch ........... 301
Hybrid vehicle driving tips ............ 334
Procedures ...........................................206
Winter drive tips................................. 337
Dynamic radar cruise control.......... 257
E-mail ........................................................ 405
ECB (Electronically Controlled
Brake System) .................................... 304
Eco drive mode ...................................... 301
Elapsed time ............................................. 124
Electric motor (traction motor) ......... 85
Electric Power Steering (EPS) ....... 304
Warning light....................................... 538
Electronic key ......................................... 138
Battery-saving function .................... 157
If the electronic key does not
operate properly ............................ 578
Replacing the battery ..........................511
Electronically Controlled
Brake System (ECB) ....................... 304
Emergency brake signal....................305
Emergency flashers ............................. 528
Emergency tire puncture
repair kit ................................................ 563
Emergency, in case of
If a warning buzzer sounds .......... 537
If a warning light turns on .............. 537
If a warning message is
displayed ............................................ 542
If the 12-volt battery is
discharged ........................................ 582
If the electronic key does not
operate properly ............................ 578
If the hybrid system will not
start ....................................................... 576
If you have a flat tire.......................... 563
If you think something
is wrong .............................................. 536
If your vehicle becomes stuck .... 592
E

628Alphabetical index
RC300h_EE(OM24740E)
If your vehicle has to be
stopped in an emergency..........529
If your vehicle needs to
be towed............................................ 530
If your vehicle overheats ................587
Energy monitor....................................... 129
Engine....................................................... 598
ACCESSORY mode .......................216
Compartment...................................... 473
Engine switch.........................................215
Hood .......................................................... 471
How to start the hybrid system.....215
Identification number ....................... 597
If the hybrid system will not
start ........................................................ 576
Ignition switch (power switch) ......215
Overheating .........................................587
Power switch .........................................215
Engine coolant ....................................... 478
Capacity .................................................. 601
Checking ............................................ 478
Preparing and checking
before winter .................................... 337
Engine coolant temperature
gauge.........................................................115
Engine oil.................................................. 474
Capacity ................................................ 599
Checking ............................................... 474
Preparing and checking
before winter .................................... 337
Engine oil maintenance data............ 476
Engine switch .......................................... 215
EPS (Electric Power Steering)........304
Warning light ...................................... 538
EV drive mode ....................................... 220
EV indicator ............................................. 126
First-aid kit storage belt ..................... 452
Flat tire
Vehicles with emergency
tire puncture repair kit ................. 563
Floor mats ................................................... 34
Fluid
Brake ....................................................... 603
Hybrid transmission ......................... 602
Washer...................................................480
Fog lights .................................................. 239
Replacing light bulbs ....................... 525
Switch ...................................................... 239
Follow me home system .................... 233
Footwell light .......................................... 446
Wattage .................................................605
Front fog lights ....................................... 239
Replacing light bulbs ....................... 525
Switch ...................................................... 239
Front personal lights............................ 448
Front position lights ............................. 232
Light switch............................................232
Replacing light bulbs ....................... 525
Front seats .................................................178
Adjustment ............................................. 178
Cleaning ................................................ 464
Correct driving posture.................... 36
Driving position memory ................ 183
Head restraints .....................................186
Jam protection function ................... 179
Seat heaters.......................................... 445
Seat position memory .......................183
Seat ventilators ................................... 445
Front turn signal lights ........................ 229
Replacing light bulbs ...........520, 525
Turn signal lever..................................229
F

631Alphabetical index
RC300h_EE(OM24740E)
Jack
Positioning the jack........................... 472
Vehicle-equipped jack ...................499
Jack handle .............................................. 499
Jam protection function
Front seats ............................................... 179
Moon roof .............................................. 201
Power window ......................................197
Keyless entry
Smart entry & start
system ......................................... 144, 150
Wireless remote control ....... 144, 150
Keys ............................................................. 138
Battery-Saving Function ..................157
Electronic key ....................................... 138
If the electronic key does not
operate properly ............................578
Key number plate ............................... 138
Keyless entry ............................... 144, 150
Mechanical key.....................................139
Power switch .........................................215
Replacing the battery.......................... 511
Warning buzzer ...................................145
Wireless remote control ................. 138
Knee airbags.............................................. 43
Lane Departure Alert (LDA) .......... 273
Language
(multi-information display) .............. 126
LDA (Lane Departure Alert) .......... 273
Lever
Auxiliary catch lever........................... 471
Hood lock release lever .................. 471
Shift lever ................................................ 222
Tilt and telescopic steering
lock release lever .............................189
Turn signal lever..................................229
Wiper lever ............................................ 241
Lexus Display Audio controller...... 346
Lexus Display Audio system............ 344
Lexus parking assist monitor ........... 286
Lexus parking assist-sensor ............. 279
License plate lights .............................. 232
Light switch............................................232
Replacing light bulbs ....................... 525
Light bulbs
Replacing............................................... 520
Wattage .................................................605
Lights
Automatic High Beam
system.................................................. 235
Fog light switch................................... 239
Follow me home system................ 233
Headlight switch .................................232
Illuminated entry system .................447
Interior lights .........................................447
Interior lights list ................................. 446
Personal lights..................................... 448
Replacing light bulbs ....................... 520
Trunk light ............................................... 152
Turn signal lever..................................229
J
K
L

634Alphabetical index
RC300h_EE(OM24740E)
Radar cruise control (dynamic
radar cruise control) ........................ 257
Radiator ................................................... 480
Radio .......................................................... 369
Rear fog light .......................................... 239
Replacing light bulb..........................525
Switch ...................................................... 239
Rear passengers’ seat belt
reminder lights....................................539
Rear seat......................................................181
Fold down the seatback .................... 181
Luggage security system .................. 151
Rear turn signal lights.......................... 229
Replacing light bulbs........................ 522
Turn signal lever ................................. 229
Wattage................................................. 605
Rear view mirror
Inside rear view mirror....................... 191
Outside rear view mirrors...............193
Rear window defogger .....................438
Refueling .................................................. 249
Capacity ................................................ 598
Fuel types .............................................. 598
If the fuel filler door cannot
be opened ...........................................251
Opening the fuel tank cap ..............251
Regenerative braking ............................ 86
Remote Touch*
Replacing
Electronic key battery .........................511
Fuses .......................................................... 514
Light bulbs ..............................................518
Tires.......................................................... 499
Reset the maintenance data .............476
Rev indicator ............................................126
Rev peak .................................................... 126
R

635Alphabetical index
RC300h_EE(OM24740E)
Seat belt reminder light ......................539
Seat belts .....................................................38
Child restraint system
installation.............................................. 60
Cleaning and maintaining
the seat belt .......................................465
Emergency Locking
Retractor (ELR).................................. 40
How to wear your seat belt .............38
How your child should wear
the seat belt .......................................... 40
Pregnant women, proper
seat belt use ........................................... 41
Reminder light and buzzer ...........539
Seat belt guide ....................................... 39
Seat belt pretensioners ...................... 39
SRS warning light.............................. 538
Seat heaters ............................................ 445
Seat position memory .......................... 183
Seat ventilators ...................................... 445
Seats, Front............................................... 178
Adjustment..............................................178
Adjustment precautions .................. 180
Child seats/child restraint
system installation ............................. 60
Cleaning................................................. 464
Driving position memory ................ 183
Head restraints..................................... 186
Jam protection function....................179
Properly sitting in the seat ................ 36
Seat heaters .......................................... 445
Seat position memory ...................... 183
Seat ventilators ....................................445
Seats, Rear ................................................. 181
Fold down the seatback ................... 181
Luggage security system ..................151
Sensor
Automatic headlight system ........ 233
Automatic High Beam system ... 238
Inside rear view mirror ..................... 192
Intrusion sensor and tilt sensor.....105
LDA (Lane Departure Alert) .......273
Lexus parking assist-sensor .........279
Radar sensor ................. 265, 312, 324
Rain-sensing windshield
wipers ................................................... 247
Service plug ............................................... 89
Service reminder indicators ............... 110
S-FLOW mode ..................................... 434
Shift lever ................................................. 222
Hybrid transmission .......................... 222
If the shift lever cannot be
shifted from P.................................... 227
Shift lock system ................................... 226
Shift position and gear position ......... 115
Side airbags ............................................... 43
Side mirrors ..............................................193
Adjusting and folding ........................ 193
BSM (Blind spot monitor) .............. 319
Linked mirror function when
reversing .............................................. 194
Mirror position memory ..................183
Side turn signal lights .......................... 229
Replacing light bulbs ....................... 525
Turn signal lever..................................229
Side windows ...........................................196
Slip indicator........................................... 538
S
*: For vehicles with a navigation or multimedia system, refer to the
“NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.