2016 LEXUS RX450H warning lights

5417-2. Steps to take in an emergency
7
When trouble arises
RX450h_U_OM0E013U WA R N I N G ■
If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediat ely and contact your Lexus dealer. The vehi-
cle will become extremely unstable during braking, and the ABS system may fail, which
could cause an accident resulting in death or serious injury. ■
When the electric power steering system warning light comes on
When the light comes on yellow, the assist to the power steering is restricted. When the
light comes on red, the assist to the power steering is lost and handling operations of
the steering wheel become extremely heavy. When steering wheel operations are
heavier than usual, grip the steering wheel firmly and operate it using more force than
usual. ■
If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause a loss of
vehicle control and result in death or serious injury. ●
Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
immediately. ●
If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If a tire is flat, change it
with the spare tire and have the flat tire repaired by the nearest Lexus dealer. ●
Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose
control of the steering wheel or the brakes. ■
If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

5437-2. Steps to take in an emergency
7
When trouble arises
RX450h_U_OM0E013U The warning lights and warning buzzers operate as follows depending on the
content of the message. If a message in dicates the need for inspection by a
dealer, have the vehicle inspected by your Lexus dealer immediately.If a warning message is displayed The multi-information display shows warnings of system malfunctions, incor-
rectly performed operations, and messages that indicate a need for mainte-
nance. When a message is shown, perform the correction procedure
appropriate to the message. 
Except F SPORT models 
F SPORT models
Master warning light The master warning light also comes on or flashes in order to indicate that a message
is currently being displayed on the multi-information display.
Multi-information display
If any of the warning messages are show n again after the following actions have
been performed, contact your Lexus dealer.
Messages and warnings 1
2
System
warning
light Wa r n i n g b u z z e r
* Wa r n i n g
Comes
on  Sounds Indicates an important situation, such
as when a system related to driving is
malfunctioning or that danger may
result if the correction procedure is not
performed
 Comes on
or flashes Sounds Indicates an important situation, such
as when the systems shown on the
multi-information display may be mal-
functioning

548 7-2. Steps to take in an emergency
RX450h_U_OM0E013U ■
If “Maintenance Required Visit Your Dealer” is displayed (U.S.A. only)
Indicates that all maintenance is required to correspond to the driven distance
on the maintenance schedule
* .
Comes on approximately 5000 miles (8000 km) after the message has
been reset.
(The indicator will not wo rk properly unless the message has been reset.)
Perform the necessary maintenance. Please reset the message after the main-
tenance is performed. (  P. 466)
* : Refer to the separate “Scheduled Mainte nance” or “Owner’s Manual Supplement”
for the maintenance interval applicable to your vehicle. ■
System warning lights
The master warning light does not come on or flash in the following cases. Instead, a sep-
arate system warning light will come on al ong with a message shown on the multi-infor-
mation display. ●
“Braking Power Low Visit Your Dealer”:
The brake system warning light (yellow) come on. (  P. 5 3 6 )●
“Antilock Brake System Malfunction Visit Your Dealer”:
The ABS warning light comes on. (  P. 5 3 7 )●
“Charging System Malfunction See Ow ner's Manual” (F SPORT models):
The charging system warning light comes on. (  P. 5 3 6 )■
Warning buzzer
 P. 5 4 0
NOTICE ■
“High Power Consumption Partial Limit On AC/Heater Operation” is frequently
shown
There is a possible malfunction relating to the charging system or the 12-volt battery
may be deteriorating. Have the vehicle inspected by your Lexus dealer.

641Alphabetical index
RX450h_U_OM0E013U Anchor brackets ........................................ 61
Antenna
Smart access system
with push-button start ................... 158
Anti-lock Brake System (ABS)........ 381
Warning light .......................................537
Approach warning.....................318, 330
Armrest .................................................... 443
Assist grips .............................................. 444
Audio system
* Automatic air conditioning
system .................................................... 405
Air conditioning filter......................... 501
Automatic air conditioning
system ................................................. 405
S-FLOW mode ............................... 406
Automatic headlight leveling
system .................................................... 253
Automatic High Beam ....................... 255
Automatic light control system.........251
Auxiliary boxes ...........................426, 430
Back door
Power back door .................................142
Touchless power back door ......... 144
Wireless remote control ..................142
Back-up lights
Replacing light bulbs ......................... 513
Wattage ................................................. 590 Battery (12-volt battery)
Battery checking ................................483
If the 12-volt battery is
discharged........................................ 568
Preparing and checking before
winter....................................................390
Warning light .......................................536
Battery (traction battery) ..................... 80
Blind Spot Monitor (BSM) ............... 363
Blind Spot Monitor
function ............................................367
Rear Cross Traffic Alert
function ............................................. 371
Bottle holders .........................................425
Brake
Brake Hold ........................................... 249
Fluid ......................................................... 588
Parking brake ...................................... 245
Regenerative braking ......................... 78
Warning light .......................................536
Brake assist ...............................................381
Brake Hold...............................................249
Warning light ....................................... 537
Break-in tips ........................................... 206
Brightness control
Instrument panel light control ........ 99
BSM (Blind Spot Monitor) ............... 363
Blind Spot Monitor function......... 367
Rear Cross Traffic Alert
function.................................................. 371B
* : Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.

643Alphabetical index
RX450h_U_OM0E013U Coolant
Capacity ................................................ 587
Checking................................................ 479
Preparing and checking
before winter ................................... 390
Cooling system ..................................... 479
Hybrid system overheating ..........574
Cornering lights .................................... 252
Cruise control
Cruise control..................................... 335
Dynamic radar cruise control...... 323
Dynamic radar cruise control
with full-speed range ....................... 311
Cup holders ............................................ 423
Curtain shield airbags ........................... 39
Customizable features ....................... 607
Customized mode ................................377 Daytime running light system.......... 253
Defogger
Outside rear view mirrors ............409
Rear window ........................................409
Windshield............................................409
Differential .............................................. 588
Dimension ............................................... 582
Dinghy towing ......................................... 231
Display
Dynamic radar cruise control ..... 323
Dynamic radar cruise control
with full-speed range .......................311
Energy monitor..................................... 124
LDA (Lane Departure Alert
with steering control) ...................306
LKA (Lane-Keeping Assist)......... 297
Multi-information display.................102
Warning messages .......................... 543
Do-it-yourself maintenance............... 471
Doors
Automatic door locking and
unlocking system..............................139
Door lock................................................ 138
Outside rear view mirrors ............. 185
Power back door ................................ 142
Rear door child-p rotectors ............139
Side doors ...............................................136
Side windows ....................................... 189
Drive information ...................................106
Drive-start control .................... 205, 242
Driver’s seat belt reminder light .... 538
Driver’s seat position memory.......... 174 D

645Alphabetical index
RX450h_U_OM0E013U Engine
ACCESSORY mode...................... 233
Compartment ......................................475
Engine switch ....................................... 232
Hood ........................................................ 473
How to start the hybrid
system .................................................. 232
Identification number ...................... 583
If your vehicle has to be
stopped in an emergency ..........529
Ignition switch (power switch) .... 232
Overheating .........................................574
Power switch........................................ 232
Engine coolant
Capacity ................................................ 587
Checking................................................ 479
Preparing and checking
before winter ................................... 390
Engine coolant temperature
gauge .........................................................97
Engine oil
Capacity ................................................ 585
Checking................................................ 476
Preparing and checking
before winter ................................... 390
Engine oil maintenance data ........... 478
Engine switch ......................................... 232
Enhanced VSC ...................................... 381
EPS
(Electronic Power Steering) ......... 381
Warning light .......................................537
EV drive mode....................................... 237
EV indicator ............................................... 78
Event data recorder (EDR) .................... 11 Flat tire ...................................................... 549
Floor mats................................................... 28
Fluid
Brake....................................................... 588
Transmission ....................................... 588
Washer ................................................... 482
Fog lights
Replacing light bulbs .........................513
Switch ...................................................... 259
Front passenger footwell
hooks.......................................................442
Front passenger occupant
classification system ............................. 51
Front passenger’s seat belt
reminder light ..................................... 538
Front seat heaters .................................. 415
Front seats ................................................. 164
Adjustment..............................................164
Cleaning................................................. 462
Correct driving posture .................... 30
Driving position memory................. 174
Head restraints ..................................... 179
Power easy access system ............. 174
Seat heaters ............................................415
Seat position memory ....................... 174
Front side marker lights
Light switch............................................. 251
Replacing light bulbs .........................513
Wattage ................................................ 590 F

647Alphabetical index
RX450h_U_OM0E013U Horn .............................................................. 181
HUD (Head-up display) ....................... 118
Humidity sensor ......................................413
Hybrid battery air vent ............................81
Hybrid battery (traction battery)
Location .................................................... 80
Specification ........................................ 585
Hybrid system ............................................76
Emergency shut off system............... 81
Energy monitor/
consumption screen .......................124
EV drive mode.................................... 237
High voltage components .............. 80
Hybrid System Indicator .................100
Hybrid system precautions............. 80
Hybrid vehicle driving tips.............387
If the hybrid system will not
start ......................................................... 561
Overheating .........................................574
Power (ignition) switch ................... 232
Regenerative braking ......................... 78
Starting the hybrid system ............. 232
Vehicle proximity notification
system ..................................................... 77
Hybrid System Indicator..................... 100
Hybrid transmission ............................ 239
If the shift lever cannot be
shifted from P .................................. 563
Paddle shift switches ............. 240, 241
S mode ......................................................241 I/M test ......................................................470
Identification
Engine .....................................................583
Vehicle ....................................................583
Ignition switch (power switch) .........232
Illuminated entry system ................... 420
Immobilizer system ................................ 85
Indicators .....................................................92
Initialization
Engine oil maintenance data ....... 478
Items to initialize ...................................619
Power back door ............................... 150
Tire pressure warning
system ................................................. 488
Inside rear view mirror.........................183
Instrument panel light control .............99
Interior lights ............................................ 417
Switch ........................................................418
Wattage ................................................ 590
Intuitive parking assist ........................ 339
Jack
Positioning a floor jack.................... 474
Vehicle-equipped jack .................. 550
Jack handle ............................................. 550
Jam protection function
Electronic sunshade.......................... 198
Moon roof ...............................................194
Panoramic moon roof...................... 198
Power back door opener
and closer ........................................... 150
Power windows................................... 190 I
J

649Alphabetical index
RX450h_U_OM0E013U License plate lights
Light switch ............................................ 251
Replacing light bulbs ......................... 513
Light
Automatic High Beam ................... 255
Cornering lights.................................. 252
Fog light switch ...................................259
Headlight switch.................................. 251
Illuminated entry system .................420
Interior light list ......................................417
Interior lights .......................................... 418
Luggage compartment light ......... 148
Personal lights ...................................... 419
Replacing light bulbs ......................... 513
Turn signal lever ................................. 244
Vanity lights .......................................... 432
Wattage ................................................. 590
Welcome lighting ..............................253
Light bulbs
Replacing ................................................ 513
Wattage ................................................. 590
LKA (Lane-Keeping Assist)............. 292
Lock steering column ......................... 235
Luggage cover ...................................... 428 Maintenance
Do-it-yourself maintenance ........... 471
General maintenance ..................... 467
Maintenance data..............................582
Maintenance requirements .......... 465
Malfunction indicator lamp .............. 536
Meter
Head-up display ................................... 118
Indicators .................................................. 92
Instrument panel light
control..................................................... 99
Meters .........................................................97
Multi-information display.................102
Settings .................................................... 109
Warning lights..................................... 536
Warning messages .......................... 543
Mirrors
Inside rear view mirror..................... 183
Outside rear view mirror
defoggers...........................................409
Outside rear view mirrors ............. 185
Vanity mirrors ..................................... 432
Moon roof
Door lock linked moon
roof operation..................................... 191
Jam protection function....................194
Operation................................................193 M
* : Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.