warning light LEXUS RX450h 2018 Owners Manual

RX450h_RX450hL _U_OM48F85UPictorial index Search by illustration
1
For safety
and security Make sure to read through them
2
Instrument cluster How to read the gauges and meters, the variety of
warning lights and indicators, etc.
3
Operation of
each component Opening and closing the doors and windows,
adjustment before driving, etc.
4
Driving Operations and advice which are necessary for driving
5
Lexus Display
Audio system Operating the Lexus Display Audio system
6
Interior features Usage of the interior features, etc.
7
Maintenance
and care Caring for your vehicle and maintenance procedures
8
When trouble
arises What to do in case of malfunction or emergency
9
Vehicle
specifications Vehicle specifications, customizable features, etc.
10
For owners Reporting safety defects for U.S. owners, and seat belt,
SRS airbag and headlight aim instructions for Canadian
owners
Index Search by symptom
Search alphabetically

TABLE OF CONTENTS
2
RX450h_RX450hL _U_OM48F85UFor your information................................... 8
Reading this manual................................... 14
How to search ..............................................15
Pictorial index............................................... 16
1-1. For safe use
Before driving ................................ 28
For safe driving .............................. 30
Seat belts .......................................... 32
SRS airbags ..................................... 36
Front passenger occupant
classification system ..................47
Exhaust gas precautions............ 53
1-2. Child safety
Riding with children ..................... 54
Child restraint systems ............... 55
1-3. Hybrid system
Hybrid system features ...............74
Hybrid system precautions....... 78
1-4. Theft deterrent system
Immobilizer system ...................... 83
Alarm ................................................. 86
2. Instrument cluster
Warning lights and
indicators....................................... 90
Gauges and meters ..................... 96
Multi-information display .......... 101
Head-up display ............................ 118
Energy monitor/
consumption screen ................124 3-1. Key information
Keys ...................................................132
3-2. Opening, closing and
locking the doors
Side doors.......................................136
Power back door ......................... 142
Smart access system with
push-button start...................... 158
3-3. Adjusting the seats
Front seats ...................................... 167
Rear seats ...................................... 168
Driving position memory........... 181
Head restraints ............................ 186
3-4. Adjusting the steering
wheel and mirrors
Steering wheel ............................. 189
Inside rear view mirror ............... 191
Outside rear view mirrors .......193
3-5. Opening, closing the
windows and moon roof
Power windows ............................196
Moon roof..................................... 200
Panoramic moon roof.............. 2041
For safety and security
2
Instrument cluster 3
Operation of each
component

TABLE OF CONTENTS
6
RX450h_RX450hL _U_OM48F85U7-1. Maintenance and care
Cleaning and protecting
the vehicle exterior ................580
Cleaning and protecting
the vehicle interior.................. 584
7-2. Maintenance
Maintenance
requirements ............................ 587
General mainte nance..............589
Emission inspection and
maintenance (I/M)
programs.................................... 592
7-3. Do-it-yourself
maintenance
Do-it-yourself service
precautions................................ 593
Hood ............................................... 595
Positioning a floor jack ............ 596
Engine compartment ............... 597
12-volt battery ............................. 605
Tires .................................................... 611
Tire inflation pressure .............. 620
Wheels ........................................... 623
Air conditioning filter ............... 625
Windshield wiper inserts ........ 628
Electronic key battery.............. 630
Checking and replacing
fuses.............................................. 632
Headlight aim .............................. 635
Light bulbs .................................... 637 8-1. Essential information
Emergency flashers .................. 652
If your vehicle has
to be stopped in
an emergency .......................... 653
8-2. Steps to take in
an emergency
If your vehicle needs to be
towed ........................................... 654
If you think something is
wrong........................................... 659
If a warning light turns
on or a warning buzzer
sounds ......................................... 660
If a warning message is
displayed .................................... 667
If you have a flat tire .................. 673
If the hybrid system will
not start ....................................... 690
If the electronic key does
not operate properly ............. 692
If the 12-volt battery is
discharged................................. 695
If your vehicle overheats......... 702
If the vehicle becomes stuck .........7067
Maintenance and care 8
When trouble arises

17Pictorial index
RX450h_RX450hL _U_OM48F85UWindshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 267 Precautions against winter season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 390
To prevent freezing (windshield wiper de-icer)
* . . . . . . . . . . . . . . . . . . . . . . . . P. 516
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 582
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P . 274Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 276
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 712
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 611Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 717
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 39 0
Checking/rotation/tire pressure warning system . . . . . . . . . . . . . . . . . . . . . . . . P. 611
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 673
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 595Opening. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 595
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 713
Coping with overheat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 702
Headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 2 52
Parking lights/daytime running lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
Front side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
Fog lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 266
Cornering lights
* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 259
Stop/tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
Back-up lights Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 246
Rear side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258 4
5
6
7
Light bulbs of the exte rior lights for driving
(Replacing method: P. 637, Watts: P. 719)
* : If equipped8
9
10
11
12
13
14
15
16
17

18 Pictorial index
RX450h_RX450hL _U_OM48F85U■ Instrument panel
Power switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 2 39Starting the hybrid system/changing the modes . . . . . . . . . . . . . . . . . . . . . . . P. 239
Emergency stop of the hybrid system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 653
When the hybrid system will not start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 690
Shift lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 246Changing the shift position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 246
Precautions against towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 654
When the shift lever does not move . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 250
Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 96Reading the meters/adjusting the instrument panel light . . . . . . . . . . . . .P. 96, 98
Warning lights/indicator lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 90
When the warning lights come on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 660 1
2
3

19Pictorial index
RX450h_RX450hL _U_OM48F85UMulti-information display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 101 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 101
Energy monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 124
When the warning messages are displayed . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 667
Parking brake switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 253 Applying/releasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 253, 254
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 391
Warning buzzer/message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 255, 667
Turn signal lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 2 52Headlight switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
Headlights/side marker lights/parking lights/tail lights/
license plate lights/daytime running lig hts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 258
Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 266
Windshield wiper and washer switch . . . . . . . . . . . . . . . . . . . . . . . . . P. 267, 272 Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 267, 272
Adding washer fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 60 4
Emergency flasher switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 652
Hood lock release lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 595
Tilt and telescopic steering contro l switch . . . . . . . . . . . . . . . . . . . . . . . . . . P. 189Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 189
Driving position memory
* 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 181
Air conditioning system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 507 Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 507
Rear window defogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 516
Audio system
* 2
Audio system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 400
Hands-free system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 461
* 1
: If equipped
* 2
: For vehicles with a navigation system , refer to “NAVIGATION SYSTEM OWNER’S
MANUAL”.4
5
6
7
8
9
10
11
12

351-1. For safe use
1
For safety and security
RX450h_RX450hL _U_OM48F85UWARNING ■
People suffering illness
Obtain medical advice and wear the seat belt in the proper way. ( → P. 32)■
When children are in the vehicle
→ P. 66 ■
Seat belt pretensioners ●
Do not place anything, such as a cushion, on the front passenger’s seat. Doing so will
disperse the passenger’s weight, which prevents the sensor from detecting the pas-
senger’s weight properly. As a result, the seat belt pretensioner for the front passen-
ger’s seat may not activate in the event of a collision. ●
If the pretensioner has activated, the SRS wa rning light will come on. In that case, the
seat belt cannot be used again and must be replaced at your Lexus dealer. ■
Adjustable shoulder anchor
Always make sure the shoulder belt is posi tioned across the center of your shoulder.
The belt should be kept away from your neck , but not falling off your shoulder. Failure to
do so could reduce the amount of protection in an accident and cause death or serious
injuries in the event of a sudden stop, sudden swerve or accident. ( → P. 32)■
Seat belt damage and wear ●
Do not damage the seat belts by allowing th e belt, plate, or buckle to be jammed in
the door. ●
Inspect the seat belt system periodically. Check for cuts, fraying, and loose parts. Do
not use a damaged seat belt until it is replaced. Damaged seat belts cannot protect an
occupant from death or serious injury. ●
Ensure that the belt and plate are locked and the belt is not twisted.
If the seat belt does not function correct ly, immediately contact your Lexus dealer.●
Replace the seat assembly, incl uding the belts, if your vehi cle has been involved in a
serious accident, even if there’s no obvious damage. ●
Do not attempt to install, remove, modify, disassemble or dispose of the seat belts.
Have any necessary repairs carried out by your Lexus dealer. Inappropriate handling
may lead to inco rrect operation.■
Using a seat belt extender ●
Do not wear the seat belt extender if you can fasten the seat belt without the extender. ●
Do not use the seat belt extender when in stalling a child restrain t system because the
belt will not securely hold the child restra int system, increasing the risk of death or
serious injury in the event of an accident. ●
The personalized extender may not be safe on another vehicle, when used by another
person, or at a different seating position other than the one originally intended.
NOTICE ■
When releasing a seat belt extender
When releasing the seat belt, press on the buckle release button on the extender, not
on the seat belt.
This helps prevent damage to the vehicle interior and the extender itself.

38 1-1. For safe use
RX450h_RX450hL _U_OM48F85UYour vehicle is equipped with ADVA NCED AIRBAGS designed based on the
US motor vehicle safety standards (F MVSS208). The airbag sensor assembly
(ECU) controls airbag deployment based on information obtained from the sen-
sors etc. shown in the system compon ents diagram above. This information
includes crash severity and occupant information. As the airbags deploy, a
chemical reaction in the inflators quickly fills the airbags with non-toxic gas to
help restrain the motion of the occupants.SRS airbag system components
Front passenger airbag
“AIR BAG ON” and “AIR BAG
OFF” indicator lights
Front side airbags
Curtain shield airbags
Side impact sensors (rear)
SRS warning light
Front passenger occupant classifica-
tion system (ECU and sensors)
Driver airbag
Side impact sensors (front door) Seat belt pretensioners and force
limiters
Passenger seat cushion airbag
Driver’s seat position sensor
Driver’s knee airbag
Driver’s seat belt buckle switch
Front passenger’s seat belt buckle
switch
Front impact sensors
Airbag sensor assembly
Rear side airbags1
2
3
4
5
6
7
8
9 10
11
12
13
14
15
16
17
18

391-1. For safe use
1
For safety and security
RX450h_RX450hL _U_OM48F85UWARNING ■
SRS airbag precautions
Observe the following precaution s regarding the SRS airbags.
Failure to do so may cause death or serious injury. ●
The driver and all passengers in the vehicle must wear their seat belts properly.
The SRS airbags are supplemental devices to be us ed with the seat belts.●
The SRS driver airbag deploys with considerable force, and can cause death or seri-
ous injury especially if the driver is very close to the airbag. The National Highway
Traffic Safety Administration (NHTSA) advises:
Since the risk zone for the driver’s airbag is the first 2 - 3 in. (50 - 75 mm) of inflation,
placing yourself 10 in. (250 mm) from your driver airbag provides you with a clear
margin of safety. This distance is measured from the center of the steering wheel to
your breastbone. If you sit less than 10 in . (250 mm) away now, you can change your
driving position in several ways:
• Move your seat to the rear as far as you can while still reaching the pedals com-
fortably.
• Slightly recline the back of the seat.
Although vehicle designs vary, many drivers can achieve the 10 in. (250 mm) dis-
tance, even with the driver seat all the wa y forward, simply by reclining the back of
the seat somewhat. If reclining the back of your seat makes it ha rd to see the road,
raise yourself by using a firm , non-slippery cushion, or ra ise the seat if your vehicle
has that feature.
• If your steering wheel is ad justable, tilt it do wnward. This points the airbag toward
your chest instead of your head and neck.
The seat should be adjusted as recommended by NHTSA ab ove, while still maintain-
ing control of the foot pedals, steering whee l, and your view of the instrument panel
controls.
●
The SRS front passenger airbag also deploy s with considerable force, and can cause
death or serious injury especially if the fron t passenger is very close to the airbag. The
front passenger seat should be as far from the airbag as possible with the seatback
adjusted, so the front passenger sits upright. ●
If the seat belt extender has been connected
to the front seat belt buckles but the seat belt
extender has not also been fastened to the
latch plate of the seat belt, the SRS front air-
bags will judge that the driver and front pas-
senger are wearing the seat belt even though
the seat belt has not been connected. In this
case, the SRS front airbags may not activate
correctly in a collision, resulting in death or
serious injury in the event of a collision. Be
sure to wear the seat belt with the seat belt
extender.

42 1-1. For safe use
RX450h_RX450hL _U_OM48F85U■
If the SRS airbags deploy (inflate) ●
Slight abrasions, burns, brui sing etc., may be sustained from SRS airbags, due to the
extremely high speed deployment (inflation) by hot gases. ●
A loud noise and white powder will be emitted. ●
Parts of the airbag module (steering wheel hub, airbag cover and inflator) as well as the
front seats, parts of the front and rear pillars, and roof side rails, may be hot for several
minutes. The airbag itself may also be hot. ●
The windshield may crack. ●
For Lexus Enform Safety Connect subscribers, if any of the following situations occur,
the system is designed to send an emerge ncy call to the response center, notifying
them of the vehicle’s location (without needing to push the “SOS” button) and an agent
will attempt to speak with the occupants to ascertain the level of emergency and assis-
tance required. If the occupants are unable to communicate, the agent automatically
treats the call as an emergency and helps to dispatch the necessary emergency ser-
vices. ( → P. 571)
• An SRS airbag is deployed.
• A seat belt pretensioner is activated.
• The vehicle is involved in a severe rear-end collision.WARNING ■
Modification and disposal of SRS airbag system components
Do not dispose of your vehicle or perform any of the following modifications without
consulting your Lexus dealer. The SRS airb ags may malfunction or deploy (inflate)
accidentally, causing death or serious injury. ●
Installation, removal, disassembly and repair of the SRS airbags ●
Repairs, modifications, removal or replacement of the steering wheel, instrument
panel, dashboard, seats or seat upholstery, front, side and rear pillars, roof side rails,
front door panels, front door trims, or front door speakers ●
Modifications to the front door panel (such as making a hole in it) ●
Repairs or modifications of the front fend er, front bumper, or side of the occupant
compartment ●
Installation of a grille guard (bull bars, ka ngaroo bar, etc.), snow plows, winches or
roof luggage carrier ●
Modifications to the vehicle’s suspension system ●
Installation of electronic devices such as mobile two-way radios and CD players●
Modifications to your vehicle for a person with a physical disability