
5808-2. Steps to take in an emergency
RC300h_EE(OM24740E)
Ensure that the shift lever is in P and depress the brake pedal.
Touch the Lexus emblem side of the
electronic key to the power switch.
When the electronic key is detected, a buzzer sounds and the power switch willturn to ON mode.
When the smart entry & start system is deactivated in customization setting, thepower switch will turn to ACCESSORY
mode.
Firmly depress the brake pedal and check that is shown on the multi-
information display.
Press the power switch.
In the event that the hybrid system still cannot be started, contact any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional.
Starting the hybrid system
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5818-2. Steps to take in an emergency
8
When trouble arises
RC300h_EE(OM24740E)
■Stopping the hybrid system
Shift the shift lever to P and press the power switch as you normally do when stopping the hybrid system.
■Replacing the key battery
As the above procedure is a temporary measur e, it is recommended that the electronic key battery be replaced immediately when the battery is depleted. ( P. 511)
■Alarm (if equipped)
Using the mechanical key to lock the doors will not set the alarm system. If a door is unlocked using the mechanical key when the alarm system is set, the alarm may be triggered.
■Changing power switch modes
Release the brake pedal and press the power switch in step above. The hybrid system does not start and modes will be changed each time the switch is
pressed. ( P. 216)
■When the electronic key does not work properly
●Make sure that the smart entry & start system has not been deactivated in the
customization setting. If it is off, turn the function on. (Customizable features P. 607)
●Check if battery-saving mode is set. If it is set, cancel the function. (P. 157)
WARNING
■When using the mechanical key and operating the power windows or moon roof
Operate the power window or moon roof after checking to make sure that there is no possibility of any passenger having any of their body parts caught in the window or moon roof.
Also, do not allow children to operate the me chanical key. It is possible for children and other passengers to get caught in the power window or moon roof.
3

5928-2. Steps to take in an emergency
RC300h_EE(OM24740E)
Stop the hybrid system. Set the parking brake and shift the shift lever to P.
Remove the mud, snow or sand from around the rear wheels.
Place wood, stones or some other material under the rear wheels to help pro-
vide traction.
Restart the hybrid system.
Shift the shift lever to D or R and rele ase the parking brake. Then, while exer-
cising caution, depress the accelerator pedal.
■When it is difficult to free the vehicle
If the vehicle becomes stuck
Carry out the following procedures if the tires spin or the vehicle becomes
stuck in mud, dirt or snow:
Press to turn off TRC.
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9
9-1. Specifications
Vehicle specifications
RC300h_EE(OM24740E)
Your Lexus vehicle is filled with “Toyota Ge nuine Differential Gear Oil” at the factory.
Use Lexus approved “Toyota Genuine Differentia l Gear Oil” or an equivalent of match- ing quality to satisfy the abov e specification. Please contact any authorized Lexus dealer or repairer, or another duly qualified an d equipped professional for further details.
*1: Minimum pedal clearance when depressed with a force of 500 N (51.0 kgf, 112.4 lbf)
while the hybrid system is operating.
*2: Parking brake pedal travel when depressed with a force of 300 N (30.6 kgf, 67.4 lbf)
Differential
Oil capacity1.35 L (1.42 qt., 1.19 Imp. qt.)
Oil type and viscosityToyota Genuine Differential gear oil LT 75W-85 GL-5 or equivalent
Brakes
Pedal clearance*1117 mm (4.6 in.) Min.
Pedal free play1.0 — 6.0 mm (0.04 — 0.24 in.)
Parking brake pedal travel*27 - 10 clicks
Fluid typeSAE J1703, FMVSS No.116 DOT 3 or SAE J1704,FMVSS No.116 DOT 4

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)

624
RC300h_EE(OM24740E)
Alphabetical index
Alphabetical index
A/C ............................................................ 432
Air conditioning filter....................... 509
Automatic air conditioning
system .................................................. 432
Blower customization ..................... 439
S-FLOW mode.................................. 434
AAC disc ...................................................371
ABS (Anti-lock Brake System) .......304
Warning light ...................................... 538
Active Sound Control (ASC)........... 231
Adaptive Variable
Suspension System .......................... 305
Air conditioning filter ......................... 509
Air conditioning system ..................... 432
Air conditioning filter....................... 509
Automatic air conditioning
system .................................................. 432
Blower customization ..................... 439
S-FLOW mode.................................. 434
Airbag manual on-off system ............. 54
Airbags......................................................... 43
Airbag manual on-off system ......... 54
Airbag operating conditions........... 49
Airbag precautions for
your child............................................... 45
Correct driving posture .................... 36
Curtain shield airbag operating
conditions.............................................. 49
Curtain shield airbag
precautions............................................47
General airbag precautions ........... 45
Locations of airbags............................ 43
Modification and disposal of
airbags .................................................... 48
Side airbag operating
conditions ..............................................49
Side airbag precautions.................... 45
Side and curtain shield airbags
operating conditions ........................49
Side and curtain shield airbags
precautions .......................................... 45
SRS airbags ..............................................43
SRS warning light .............................. 538
Alarm ...........................................................102
Anchor brackets ...................................... 64
Antennas (smart entry &
start system) ........................................ 155
Anti-lock Brake System (ABS)....... 304
Warning light....................................... 538
Approach warning............................... 262
ASC (Active Sound Control) ...........231
Assist grips .............................................. 457
Audio input ...............................................351
Audio system.......................................... 344
Audio CD player................................. 371
Audio input ............................................. 351
AUX port/USB port ......................... 351
Bluetooth® audio ............................. 395
iPod ........................................................... 377
Optimal use............................................ 361
Portable music player ..................... 386
Radio........................................................ 369
Steering wheel audio switch........ 350
USB memory ........................................381
Automatic headlight leveling
system ................................................... 234
Warning light....................................... 539
Automatic High Beam ...................... 235
Automatic light control system ...... 232
A