2017 LEXUS RC300H check engine

4807-3. Do-it-yourself maintenance
RC300h_EE(OM24740E)
Check the radiator and condenser and clear away any foreign objects.
If either of the above parts is extremely dirty or you are not sure of their condi-
tion, have your vehicle inspected by any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
If any washer does not work or the
warning message appears on the multi-
information display, the washer tank
may be empty. Add washer fluid.
Radiator and condenser
WARNING
■When the hybrid system is hot
Do not touch the radiator or condenser as they may be hot and cause serious injuries, such as burns.
Washer fluid
WARNING
■When adding washer fluid
Do not add washer fluid when the hybrid sy stem is hot or operating as washer fluid
contains alcohol and may catch fi re if spilled on the engine etc.
NOTICE
■Do not use any fluid other than washer fluid
Do not use soapy water or engine antifreeze instead of washer fluid. Doing so may cause streaking on the vehicle’s painted surfaces.
■Diluting washer fluid
Dilute washer fluid with water as necessary. Refer to the freezing temperatures listed on the label of the washer fluid bottle.

5147-3. Do-it-yourself maintenance
RC300h_EE(OM24740E)
Turn the power switch off.
Open the fuse box cover.
Engine compartment
Remove the clips.
Push the tabs on either side to
detach the lock and lift the lid off
while pulling the lock plate.
When installing the lid, check that the
lock plate and the tabs on either side are connected correctly.
Checking and replacing fuses
If any of the electrical components do not operate, a fuse may have blown. If
this happens, check and repl ace the fuses as necessary.
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2

5518-2. Steps to take in an emergency
8
When trouble arises
RC300h_EE(OM24740E)
Indicates that the windows are not fully closed (with the
power switch off, and the driver’s door open) A buzzer also sounds. Close all the windows.
(If equipped)
Indicates that the windows and the moon roof are not fully closed (with the power switch off, and the driver’s
door open) A buzzer also sounds. Close all the windows and the moon roof.
Indicates a malfunction in the brake override system
A buzzer also sounds.  Have the vehicle inspected by any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
Indicates that engine oil level is low This message may appear if the vehicle is stopped on a
slope. Move the vehicle to a level surface and check to see if the message disappears.A buzzer also sounds.
 Check the level of engine oil, and add if necessary.
Indicates that the hybrid system has overheated This message may be displayed when driving undersevere operating conditions. (For example, when driv-
ing up a long steep hill.) A buzzer also sounds.
 Stop and check. (P. 587)
Warning messageDetails/Actions
(Flashes)
(Flashes)

5548-2. Steps to take in an emergency
RC300h_EE(OM24740E)
Indicates that the engine oil is scheduled to be changed.
(The indicator will not work properly unless the message has been reset.) Check the engine oil, and change if necessary.
After changing the engine oil, the message should be reset.
Indicates that the engine oil should be changed. (Afterthe engine oil is changed and the message has been
reset.)  Check and change the engine oil, and oil filter by any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional. After changing the engine oil, the message should bereset.
(If equipped)
Indicates that the Automatic High Beam switch ispressed while the headlights are in low beam.
 Turn the high beam on and press the Automatic High Beam switch again.
(If equipped)
Indicates that, since the VSC (Vehicle Stability Control)system was turned off, the pre-crash brake system oper-
ation is stopped Operation of the pre-crash brake assist is alsostopped.
 Turn the VSC on. (P. 307)
(If equipped)
Indicates that the PCS (Pre-Crash Safety system) is not currently functional because the grille cover or the sen- sor is dirty
 Check the grille cover and the sensor and clean them if they are dirty.
Warning messageDetails/Actions
(Flashes)

5908-2. Steps to take in an emergency
RC300h_EE(OM24740E)
Start the hybrid system and check for the multi-information display.
If the message does not disappear:
Stop the hybrid system and contact any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
If the message is not displayed:
Have the vehicle inspected at the nearest authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
WARNING
■When inspecting under the hood of your vehicle
Observe the following precautions. Failure to do so may result in serious injury such as burns.
●If steam is seen coming from under the h ood, do not open the hood until the steam has subsided. The engine compartment may be very hot.
●After the hybrid system has been turned off, check that the “READY” indicator is off.
When the hybrid system operating, the ga soline engine may automatically start, or the cooling fan may suddenly operate even if the gasoline engine stops. Do not touchor approach rotating parts such as the belt and fan, which may lead to fingers or
clothing (especially a tie, a scarf or a mu ffler) getting caught, resulting in serious injury.
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●Do not loosen the coolant reservoir caps orradiator cap while the hybrid system and radi-
ator are hot. High temperature steam or coolant couldspray out.

599
9
9-1. Specifications
Vehicle specifications
RC300h_EE(OM24740E)
■Oil capacity (Drain an d refill [Reference*])
*: The engine oil capacity is a reference quantity to be used when changing the engine
oil. Warm up the engine and turn off the hybrid system, wait more than 5 minutes, and
check the oil level on the dipstick.
■Engine oil selection
“Toyota Genuine Motor Oil” is used in your Lexus vehicle. Lexus recom-
mends the use of approved “Toyota Genuine Motor Oil”. Another motor oil of
matching quality can also be used.
Oil grade:
0W-20, 5W-30 and 10W-30:
API grade SL “Energy-Conserving ”, SM “Energy-Conserving” or SN
“Resource-Conserving”; or IL SAC multigrade engine oil
15W-40:
API grade SL, SM or SN multigrade engine oil
Recommended viscosity (SAE):
SAE 0W-20 is filled into your Lexus
vehicle at manufacturing, and the
best choice for good fuel economy
and good starting in cold weather.
If SAE 0W-20 oil is not available,
SAE 5W-30 oil may be used. How-
ever, it should be replaced with SAE
0W-20 at the next oil change.
If you use SAE 10W-30 or a higher
viscosity engine oil in extremely low
temperatures, the engine may
become difficult to start, so SAE
0W-20 or 5W-30 engine oil is rec-
ommended.
Lubrication system
With filter4.5 L (4.8 qt., 4.0 Imp. qt.)
Without filter4.1 L (4.3. qt., 3.6 Imp. qt.)
Temperature range anticipated before
next oil change
Preferred

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

633Alphabetical index
RC300h_EE(OM24740E)
Navigation system*
Odometer................................................... 115
Oil
Differential oil ...................................... 603
Engine oil .............................................. 599
Opener
Hood .......................................................... 471
Trunk ......................................................... 150
Outer foot lights .................................... 446
Outside rear view mirrors ................. 193
Adjusting and folding.........................193
BSM (Blind Sport Monitor)............319
Linked mirror function
when reversing..................................194
Mirror position memory.................. 183
Outside rear view mirror
defoggers ..........................................438
Outside temperature .............................115
Overheating ...........................................587
Paddle shift switches ................ 224, 225
Parking assist sensors......................... 279
Parking brake......................................... 230
PCS
(Pre-Crash Safety system)............... 311
PCS OFF switch.................................. 312
Warning light....................................... 538
Personal lights........................................ 448
Pollen removal mode.......................... 438
Pop-up display.........................................126
Pop Up Hood............................................ 56
Power control unit .................................. 89
Power control unit coolant ............... 478
Capacity...................................................601
Checking ............................................... 478
Preparing and checking before
winter ....................................................337
Power outlet ........................................... 456
Power steering (Electric power
steering system)................................. 304
Warning light....................................... 538
Power switch ............................................215
Power windows .......................................196
Door lock linked window
operation..............................................198
Jam protection function ................... 197
Operation ............................................... 196
Window lock switch .......................... 196
Pre-Crash Safety system (PCS) ....... 311
PCS OFF switch.................................. 312
Warning light....................................... 538
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