power steering LEXUS RX450h 2015 Owner's Guide

7385-2. Steps to take in an emergency
■
If the malfunction indicator lamp comes on while driving
First check the following: ●
Is the fuel tank empty?
If it is, fill the fuel tank immediately.●
Is the fuel tank cap loose?
If it is, tighten it securely.
The lamp will go off after several driving trips.
If the light does not go off even after several trips, contact your Lexus dealer as soon
as possible.■
SRS warning light
This warning light system monitors the airb ag sensor assembly, front airbag sensors,
side and curtain shield airbag sensors, curtain shield and rear side airbag sensors,
door sensors, driver's seat position sensor, driver's seat belt buckle switch, front
passenger occupant classification system (ECU and sensors), “AIR BAG ON” indi-
cator light, “AIR BAG OFF” in dicator light, front pass enger's seat belt buckle
switch, seat belt pretensioner assemblies, inflators, interconnecting wiring and
power sources. (  P. 1 3 2 )■
Front passenger detection sensor, passen ger seat belt reminder and warning
buzzer ●
If luggage is placed on the front passenger seat, the front passenger detection
sensor may cause the warning light to flash and the warning buzzer to sound
even if a passenger is not sitting in the seat.●
If a cushion is placed on the seat, the sensor may not detect a passenger, and the
warning light may not operate properly.■
Electric power steering system warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient or the voltage temporarily
drops, the electric power steering system warning light may come on and the warn-
ing buzzer may sound.
■
When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Pushing the tire
pressure warning reset switch will not turn off the tire pressure warning light.

7405-2. Steps to take in an emergency
●
If non-genuine Lexus wheels are used (Even if you use Lexus wheels, the tire
pressure warning system may not work properly with some types of tires.)●
If tire chains are used●
Vehicles with a full-size spare tire: If the spare tire is in a location subject to poor
radio wave signal reception●
Vehicles with a full-size spare tire: If a large metallic object which can interfere
with signal reception is pu t in the luggage compartment■
If the tire pressure warning light freque ntly comes on after blinking for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1 minute
when the “POWER” switch is turned to ON mode, have it checked by your Lexus
dealer.■
Customization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features  P. 825)
CAUTION■
When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, hold firmly and
operate 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 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 pres-
sure 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.

5
When trouble arises
7475-2. Steps to take in an emergency
Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system;
or,
• The seat belt pretensioner system
Indicates a malfunction in:
• The ABS; or,
• The brake assist system
Indicates a malfunction in the EPS (Electric Power
Steering) system
(If equipped) Indicates a malfunction in the Blind Spot Monitor.Wa r n i n g m e s s a g e Details

7625-2. Steps to take in an emergency
Sounds
once 
(Flashes) The driver's door
was opened and
closed with the
“POWER” switch
turned off and
then the
“POWER” switch
was put in
ACCESSORY
mode twice with-
out the hybrid sys-
tem being started. Press the
“POWER” switch
while depressing
the brake pedal.
During an hybrid
system starting
procedure in the
event that the
electronic key was
not functioning
properly
(  P. 7 8 2 ) , t h e
“POWER” switch
was touched with
the electronic key. Press the
“POWER” switch
within 10 seconds
of the buzzer
sounding.
Sounds
once 
(Flashes) The steering lock
could not be
released within 3
seconds of the
“POWER” switch
being pressed. Press the
“POWER” switch
while depressing
the brake pedal
and moving the
steering wheel left
and right.Interior
buzzer Exterior
buzzer Wa r n i n g m e s s a g e Details Correction
procedure

5
When trouble arises
7955-2. Steps to take in an emergency
If your vehicle has to be stopped in an emergency
CAUTION
■
If the hybrid system has to be turned off while driving
Power assist for the steering wheel will be lost, making the steering wheel heavier to
turn. Decelerate as much as possible before turning off the hybrid system.Only in an emergency, such as if it becomes impossible to stop the vehicle
in the normal way, stop the vehicle using the following procedure:
Steadily step on the brake pe dal with both feet and firmly
depress it. Do not pump the brake pedal repeatedly as this will increase the
effort required to slow the vehicle.
Shift the shift lever to N.
If the shift lever is shifted to N
After slowing down, stop the vehicl e in a safe place by the road.
Stop the hybrid system.
If the shift lever cannot be shifted to N
Keep depressing the brake pedal with both feet to reduce vehi-
cle speed as much as possible.
To stop the hybrid system, press
and hold the “POWER” switch
for 2 consecutive seconds or
more, or press it briefly 3 times
or more in succession.
Stop the vehicle in a safe place by the road.STEP 1
STEP 2
STEP 3
STEP 4
STEP 3
STEP 4
Press and hold for 2 seconds or more,
or press briefly 3 times or more
STEP 5

8196-1. Specifications
6
Vehicle specifications Glossary of tire terminology Tire related term Meaning
Cold tire inflation pres-
sure Tire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Maximum inflation pres-
sure The maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation
pressure Cold tire inflation pressure recommended by a man-
ufacturer
Accessory weight The combined weight (in excess of those standard
items which may be replaced) of hybrid transmission,
power steering, power brakes, power windows,
power seats, radio and heater, to the extent that these
items are available as factory-installed equipment
(whether installed or not)
Curb weight The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipp ed, air conditioning and
additional weight optional engine
Maximum loaded vehicle
weight The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight 150 lb. (68 kg) times the number of occupants speci-
fied in the second column of Table 1
* that follows

858Abbreviation list
Abbreviation/Acronym list ABBREVIATIONS MEANING
2WD 2 Wheel Drive
4WD 4 Wheel Drive
A/C Air Conditioning
ABS Anti-lock Brake System
AI-SHIFT Artificial Intelligence Shift control
ALR Automatic Locking Retractor
AW D All Wheel Drive
BSM Blind Spot Monitor
CRS Child Restraint System
DISP Display
ECO Economy/Ecology
ECU Electronic Control Unit
EDR Event Data Recorder
ELR Emergency Locking Retractor
EPS Electric Power Steering
GAWR Gross Axle Weight Ratings
GCWR Gross Combination Weight Rating
GVWR Gross Vehicle Weight Rating
I/M Emission Inspection and Maintenance
LATCH Lower Anchors and Tethers for Children
LED Light Emitting Diode
MMT Methylcyclopentadienyl Manganese Tricarbonyl
M + S Mud and Snow
MTBE Methyl Tertiary Butyl Ether
OBD On Board Diagnostics

863Alphabetical index
Daytime running light system............ 219
Defogger*
Rear window........................................358
Side mirrors..........................................358
Dimensions ............................................. 798
Dinghy towing ........................................324
Display
Energy flow ............................................. 39
Multi-information display............... 206
Trip information .................................. 209
Warning message .............................743
Do-it-yourself maintenance............. 648
Door courtesy lights
Door courtesy lights ........................ 582
Wattage ................................................ 809
Door lock
Back door .................................................75
Side door ................................................... 72
Wireless remote control................... 69
Door pockets ......................................... 587
Doors
Back door .................................................75
Door lock ................................ 56, 69, 72
Door windows ........................................ 112
Power back door ..................................75
Side door ................................................... 72
Side mirrors............................................109
Driver's seat belt reminder light .....736
Driving
Break-in tips ........................................... 167
Correct posture ...................................130
Procedures .............................................166
Utility vehicle
precautions ........................................292
Winter driving tips ............................ 302 Driving position memory ...................... 93
Electric power steering ........................271
Electronic features control ...............206
Electronic key
If the electronic key does not
operate properly ............................. 781
Emergency flashers
Switch....................................................... 724
Emergency, in case of
If a warning buzzer sounds........... 733
If a warning light turns on............... 733
If a warning message is
displayed............................................. 743
If the back door opener is
inoperative ............................................ 79
If the electronic key does not
operate properly ............................. 781
If the hybrid system will
not start ................................................ 777
If the shift lever cannot be
shifted from P ................................... 779
If the vehicle has a discharged
12-volt battery...................................784
If you have a flat tire ......................... 764
If you lose your keys ........................ 780
If you think something is
wrong ................................................... 732
If your vehicle becomes stuck ..... 793
If your vehicle has to be
stopped in an emergency ..........795
If your vehicle needs to be
towed.................................................... 725
If your vehicle overheats ............... 788D
E
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.

865Alphabetical index
Fuel
Capacity................................................ 800
Fuel gauge .............................................. 197
Information............................................. 810
Refueling ....................................................119
Type........................................................... 810
Fuel consumption.....................................45
Fuel door..................................................... 119
Fuel filler door........................................... 119
Fuses.......................................................... 689
Garage door opener............................ 616
Gauges....................................................... 197
Glove box ............................................... 586
Hands-free system for
mobile phone* ........................ 429, 547
Hazard lights
Switch ......................................................724
Head restraints
Adjustment ..............................................97
Headlight aim .........................................706
Headlight cleaner .................................. 231
Headlights
Discharge headlight
precautions ........................................ 722
Replacing light bulbs ....................... 708
Switch ........................................................ 217
Wattage ................................................ 809
Head-up display
Display contrast adjustment
switch ..................................................... 212
Display position adjustment
switch ..................................................... 212
Head-up display main switch ....... 212 Heaters
Seat heaters ......................................... 605
Side mirrors* ....................................... 358
Steering wheel.................................... 604
Hill-start assist control ........................ 276
Hood ........................................................... 651
Hooks
Cargo ........................................................612
Coat......................................................... 608
Horn ............................................................ 196
HUD
Display contrast adjustment
switch...................................................... 212
Display position adjustment
switch...................................................... 212
Head-up display main switch ........212
Hybrid system
Emergency shut off system.............. 35
Energy monitor/consumption
screen...................................................... 39
High voltage components ............... 34
Hybrid system indicator .................. 201
“POWER” switch................................. 177
Vehicle Proximity Notification
System.......................................................31
Hybrid transmission
Hybrid transmission........................... 186
If the shift lever cannot be
shifted from P ................................... 779
S mode ..................................................... 190G
H
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.

870Alphabetical index
Spare tire
Inflation pressure................................807
Storage location ................................. 764
Spark plug ............................................... 804
Specifications .........................................798
Speedometer........................................... 197
Steering
Column lock release ........................ 180
Steering wheel
Adjustment............................................. 105
Audio switches* ..................... 426, 543
Heated steering wheel....................604
Power easy access system .............. 95
Steering wheel position
memory.................................................. 93
Storage feature..................................... 585
Stuck vehicle
If your vehicle becomes stuck..... 793
Sun visors .................................................595
Sunshades ................................................... 116 Switch
Display contrast adjustment
switch ......................................................212
Display position adjustment
switch ......................................................212
Driving mode selector switch.......188
Emergency flasher switch.............. 724
ENTER switch .................................... 206
Fog light switch .....................................221
Hazard light switch ........................... 724
Head-up display main switch ........212
Heated steering wheel switch .... 604
Ignition switch ........................................177
Light switches.........................................217
Menu switch......................................... 206
Power back door switch ................... 75
Power door lock switch..................... 72
“POWER” switch .................................177
Power window switch ........................ 112
Pre-collision braking off
switch ....................................................279
Rear window wiper and
washer switch ...................................229
Window lock switch ............................ 112
Wiper and washer switch ..............223