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5777-2. Steps to take in an emergency
7
When trouble arises
RX450h_U_OM0E013U
Start the hybrid system and check if “Hybrid System Overheated Reduced
Output Power” is shown on the multi-information display.
If the message does not disappear:
Stop the hybrid system and contact your Lexus dealer.
If the message is not displayed:
Have the vehicle inspected at the nearest Lexus dealer.
WARNING
■To prevent an accident or injury 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 is operating, the gasoline engine may automatically start, or
the cooling fans may suddenly operate even if the gasoline engine stops. Do not
touch or approach rotating parts such as th e fans, which may lead to fingers or cloth-
ing (especially a tie, a scarf or a muffler) getting caught, resulting in serious injury.
●Do not loosen the radiator cap and the coolant reservoir caps wh ile the hybrid system
and radiator are hot.
High temperature steam or coolant could spray out.
NOTICE
■When adding engine/power control unit coolant
Add coolant slowly after the hybrid system has cooled down sufficiently. Adding cool
coolant to a hot hybrid system too quickly can cause damage to the hybrid system.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreig n matter (such as sand or dust etc.).
●Do not use any coolant additive.
6
Page 646 of 660

646Alphabetical index
RX450h_U_OM0E013U
Front turn signal lightsReplacing light bulbs ......................... 513
Turn signal lever ................................. 244
Wattage ................................................. 590
Fuel Capacity ................................................ 584
Fuel gauge ................................................ 97
Information ............................................. 591
Refueling................................................. 267
Type ......................................................... 584
Fuel filler door ........................................ 267 Refueling................................................. 267
When the fuel filler door cannot be opened .........................269
Fuses ..........................................................508
Garage door opener .......................... 445
Gauges .........................................................97
Glove box ................................................ 422
Grocery bag hooks ............................. 428 Head restraints........................................ 179
Head-up display ...................................... 118
Headlight cleaner ................................ 260
Headlights ................................................. 251
Automatic headlight leveling ....... 253
Automatic High Beam.................... 255
Light switch............................................. 251
Replacing light bulbs .........................513
Wattage ................................................ 590
Windshield wiper linked headlight illumination ................... 254
Heated steering wheel ........................ 415
Heaters Automatic air conditioning system .............................................. 405
Heated steering wheel ................... 415
Outside rear view mirrors ........... 409
Seat heaters .............................. 415 , 416
High mounted stoplight Replacing .................................................513
Hill-start assist control .........................381
Hood ..........................................................473 Open ....................................................... 473
Hooks Cargo hooks ........................................427
Cargo net hooks ................................427
Front passenger footwell hooks.................................................... 442
Grocery bag hooks ......................... 428
Retaining hooks (floor mat)............. 28
G
H
Page 650 of 660

650Alphabetical index
RX450h_U_OM0E013U
Multi-information displayAWD Control display ...................... 107
Clock........................................................... 97
Drive information ................................ 106
Dynamic radar cruise control...... 323
Dynamic radar cruise control with full-speed range ....................... 311
Energy monitor .....................................124
G-force display....................................108
Language .................................................. 113
LDA (Lane Departure Alert with steering control) .................. 306
LKA (Lane-Keeping Assist) ......... 297
Outside temperature .......................... 97
Settings ..................................................... 109
Suggestion function ............................. 116
Sway warning display ....................... 107
Warning messages...........................543
Navigation system
*
Noise from under vehicle ....................... 8 Odometer .................................................. 115
Oil
Engine oil .............................................. 585
Rear differential oil ........................... 588
Opener Fuel filler door...................................... 269
Hood........................................................ 473
Power back door ................................ 143
Outside rear view mirrors ..................185 Adjusting and folding ....................... 185
Blind Spot Monitor (BSM) ........... 363
Linked mirror function when reversing..................................187
Mirror position memory .................. 174
Outside rear view mirror defoggers...........................................409
Outside temperature display .............. 97
Overheating............................................574
N
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Page 660 of 660
660
RX450h_U_OM0E013UGAS STATION INFORMATION
Auxiliary catch leverFuel filler door
P. 473 P. 269
Hood lock release leverFuel filler door openerTire inflation pressure
P. 473 P. 269P. 589
Fuel tank capacity
(Reference)17.2 gal. (65 L, 14.3 Imp. gal.)
Fuel type
Unleaded gasoline only P. 584
Cold tire inflation
pressure P. 589
Engine oil capacity
(Drain and refill —
reference)With filter
Without filter 5.8 qt. (5.5 L, 4.8 Imp. qt.)
5.6 qt. (5.3 L, 4.7 Imp. qt.)
Engine oil type“Toyota Genuine Motor
Oil” or equivalent
Oil grade: ILSAC GF-5 multigrade engine oil
Recommended viscosity: SAE 0W-20 P. 586