
6169-2. Customization 
RC300h_EE(OM24740E)
■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, both side the doors will be 
locked. • If the vehicle is started with both side doors locked, the speed-detecting automaticdoor lock will not operate. 
• If the vehicle is started with any door unlocked, the speed-detecting automatic door lock will operate.
●When the smart entry & start system is off, the entry unlock function cannot be custom-ized.
●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 operational signal (Emergency flashers) function setting.
●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 power switch is turned off and then to ON mode.
■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 customiz-ing the features.
WARNING
■During customization 
As the hybrid system needs to be operating during customization, ensure that the vehi- cle 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 12-volt battery discharge, ensure  that the hybrid system is operating while customizing features. 

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) 

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 

636Alphabetical index
RC300h_EE(OM24740E)
Smart entry & start system................. 155 
Antenna location................................. 155 
Entry functions............................ 144, 150 
Starting the hybrid system...............215 
SMS (Short message service) .........405 
Snow mode ............................................. 223 
Snow tires................................................. 339 
Spark plug................................................. 601 
Specifications .........................................596 
Speech command system  ................ 429 
Speed indicator ...................................... 126 
Speedometer ............................................115 
Sport mode............................................... 301 
Steering lock .............................................217 
Column lock release.......................... 217 
Steering wheel ........................................ 189 
Adjustment............................................. 189 
Audio switches................................... 350 
Auto tilt away ........................................ 190 
Heated steering wheel.................... 444 
Steering wheel position  
memory................................................ 183 
Stop lights 
Emergency brake signal ............... 305 
Replacing light bulbs........................525 
Storage feature...................................... 449 
Stuck 
If the vehicle becomes stuck ........592 
Sun shade .................................................. 201 
Sun visors ................................................. 455 
Switches 
ASC (Active Sound Control)  
switch...................................................... 231 
Audio remote control  
switches.............................................. 350 
Automatic High Beam switch ..... 235 
BSM (Blind spot monitor)  
switch ..................................................... 319 
Cruise control switch .......... 253, 257 
Door lock switches............................. 146 
Driving mode select switch............301 
Driving position memory  
switches ................................................183 
Dynamic radar cruise control  
switch ....................................................257 
Emergency flashers switch........... 528 
EV drive mode switch .................... 220 
Fog light switch................................... 239 
Heated steering wheel switch .... 444 
Ignition switch ....................................... 215 
LDA (Lane Departure 
 Alert) switch ..................................... 274 
Lexus parking assist-sensor  
switch ....................................................279 
Light switch............................................232 
Meter control switches..................... 123 
Moon roof switches ......................... 200 
Outside rear view mirror  
switches ................................................ 193 
Paddle shift switches.............224, 225 
PCS OFF switch.................................. 312 
Power door lock switch................... 146 
Power switch ......................................... 215 
Power window switches.................. 196 
Rear window and outside rear  
view mirror defoggers  
switch ................................................... 438 
Seat heater switches ........................ 445 
Seat ventilator switches.................. 445 
Snow mode switch ............................223 
Talk switch.............................................408 
Telephone switches .........................408