cruise control LEXUS RX450h 2015 Owner's Manual

3212-5. Driving information
2
When driving CAUTION■
Trailer towing precautions
To tow a trailer safely, use extreme care an d drive the vehicle in accordance with the
trailer’s characteristics and operating conditions. Failure to do so could cause an
accident resulting in death or serious injury. Vehicle stability and braking perfor-
mance are affected by trailer stability, brake setting and performance, and the hitch.
Your vehicle will handle differently when towing a trailer.■
To avoid accident or injury ●
Do not exceed the TWR, unbraked TWR, GCWR, GVWR or GAWR.●
If the gross trailer weight is over 2000 lb. (907 kg), a sway control device with
sufficient capacity is required.●
Adjust the tongue weight within the appropriate range. Place heavier loads as
close to the trailer axle as possible.●
Do not exceed 65 mph (104 km/h), the posted towing speed limit or the speed
limit for your trailer as set forth in your trailer owner’s manual, whichever is lowest.
Slow down sufficiently before making a turn, in cross winds, on wet or slippery
surface, etc. to help avoid an accident. If you experience a vehicle-trailer instabil-
ity from reducing a certain speed, slow down and make sure you keep your vehi-
cle speed under the speed of which you experience the instability.●
Do not make jerky, abrupt or sharp turns.●
Do not apply the brakes suddenly as you may skid, resulting in jackknifing and
loss of vehicle control. This is especially true on wet or slippery surfaces.●
Do not exceed the trailer hitch assembly weight, gross vehicle weight, gross axle
weight and trailer tongue weight capacities.●
Do not use cruise control when towing.●
Slow down and downshift before descending steep or long downhill grades. Do
not make sudden downshifts while descending steep or long downhill grades.
●
Vehicle-trailer instability is more likely on steep long downhills. Before descend-
ing steep or long downhill grades, slow down and downshift. Do not make sudden
downshifts when descending steep or lo ng downhill grades. Avoid holding the
brake pedal down too long or applying the brakes too frequently. This could
cause the brakes to overheat and result in reduced braking efficiency.
●
Do not tow a trailer when the compact spare tire is installed on your vehicle.

6974-3. Do-it-yourself maintenance
4
Maintenance and care 24
AM2 7. 5 A Starter system25
ECU-B NO. 2 7. 5 A Air conditioning system, front passen-
ger occupant classification system,
audio system, vehicle dynamics inte-
grated management, power windows,
electric power steering system26
MAYDAY/TEL 7. 5 A MAYDAY/TEL27
IMMOBI 7. 5 A IMMOBI28
ABS MAIN
NO. 3 15 A Brake system29
DRL 7. 5 A Daytime running light system30
IGN 10 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem31
DOME 10 A Vanity mirror lights, luggage compart-
ment lights, interior lights, personal
lights, door courtesy lights, footwell
lights, scuff lights
32
ECU-B NO. 1 10 A Tilt and telescopic steering, multiplex
communication system, meters and
gauges, driving position memory,
power seats, power back door, head-
up display, starter system, outside rear
view mirror, steering sensor, garage
door opener
33
EFI NO. 1 10 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
34
WIP-S 7. 5 A Cruise controlFuse Ampere Circuit

6984-3. Do-it-yourself maintenance
35
ECU-IG1 NO. 4 10 A Air conditioning system, rear window
defogger, electronically controlled
brake system, electric cooling fans36
BK/UP LP 7. 5 A Back-up lights37
ECU-IG1 NO. 5 15 A Air conditioning system38
ECU-IG1 NO. 6 10 A Head light cleaner, cruise control, air
conditioning system, Blind Spot Moni-
tor39
EFI NO. 2 10 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem40
F/ P M P 15 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem41
DEICER 25 A Windshield wipers and washer
42
STOP 7. 5 A Vehicle Proximity Notification System,
vehicle dynamics integrated manage-
ment, stop lights, multiport fuel injec-
tion system/sequential multiport fuel
injection system, shift lock control sys-
tem, starter system, cruise control43
TOW I N G BAT T 20 A44
TOW I N G 30 A Trailer lights45
FILTER 10 A
46
IG1 MAIN 30 A ECU-IG1 NO. 6, BK/UP LP, ECU-
IG1 NO. 5, ECU-IG1 NO. 4
47
H-LP RH HI 15 A Right-hand headlight (high beam)
48
H-LP LH HI 15 A Left-hand headlight (high beam)Fuse Ampere Circuit

7465-2. Steps to take in an emergency
(Flashes)
(If equipped) Indicates a malfunction in the pre-collision system
(If equipped) Indicates a malfunction in the intuitive parking assist
The malfunctioning assi st-sensor is flashing.
Indicates a malfunction in the cruise control system
or the radar cruise control system (If equipped)
Press the “ON-OFF” button once to deactivate the
system, and then press the button again to reactivate
the system.
(If equipped) Indicates a malfunction in the automatic headlight
leveling systemWa r n i n g m e s s a g e Details

5
When trouble arises
7515-2. Steps to take in an emergency
(If equipped) Indicates that the pre-
collision system is not
currently functional
because the grille or the
sensor is dirty.
This message also
appears when the pre-
collision system is not
functional due to over-
heating. • Check the grille and the
sensor and clean them if
they are dirty.
• In case of overheating,
the system will become
functional once the sys-
tem cools down.
(If equipped) Indicates that intuitive
parking assist is dirty or
covered with ice
A buzzer also sounds.
The site of the malfunc-
tion and the vehicle
image are flashing. Clean the sensor.
(If equipped) Indicates that the radar
cruise control sensor is
dirty or covered with ice
A buzzer also sounds. Clean the sensor.
(If equipped) Indicates that the radar
cruise control system is
unable to judge vehicle-
to-vehicle distance
A buzzer also sounds. • Switch driving mode to
normal.
• If the windshield wipers
are on, turn them off or
set them to a mode other
than AUTO (If
equipped) or high speed
wiper operation.Wa r n i n g m e s s a g e Details Correction procedure

5
When trouble arises
7635-2. Steps to take in an emergency
■
Warning message in radar cruise mode (if equipped)
In the following cases, the warning message may not be displayed even if vehicle-
to-vehicle distance decreases: ●
When your vehicle and the vehicle ahead are traveling at the same speed or the
vehicle ahead is traveling more quickly than your vehicle●
When the vehicle ahead is traveling at a very low speed●
Immediately after cruise control speed is set●
At the instant the accelerator pedal is depressed

5
When trouble arises
7755-2. Steps to take in an emergency
CAUTION■
When using the compact spare tire ●
Remember that the compact spare tire prov ided is specifically designed for use
with your vehicle. Do not use your compact spare tire on another vehicle.●
Do not use more than one compact spare tire simultaneously.●
Replace the compact spare tire with a standard tire as soon as possible.●
Avoid sudden acceleration, abrupt steeri ng, sudden braking and shifting opera-
tions that cause sudden engine braking.■
When the compact spare tire is attached
The vehicle speed may not be correctly detected, and the following systems may
not operate correctly: ●
ABS & Brake assist●
VSC●
TRAC●
VDIM●
Intuitive parking assist (if equipped)●
Navigation system (if equipped)●
Cruise control (if equipped)●
Dynamic radar cruise control (if equipped)●
Pre-Collision System (if equipped)
Also, not only can the following system not be utilized fully, but it may even nega-
tively affect the drive-train components: ●
AWD system (if equipped)■
Speed limit when using the compact spare tire
Do not drive at speeds in excess of 50 mph (80 km/h) when a compact spare tire is
installed on the vehicle.
The compact spare tire is not designed for driving at high speeds. Failure to observe
this precaution may lead to an accident causing death or serious injury.

862Alphabetical index
Card key ....................................................... 51
Care
Exterior ................................................... 634
Interior ..................................................... 637
Seat belts................................................638
Cargo capacity ....................................... 301
Cargo hooks ............................................ 612
CD changer
CD ...............................................380, 485
MP3 .............................................. 381, 493
WMA disc.................................. 381, 493
CD player ................................... 380, 485
Chains .......................................................302
Child restraint system
Booster seats, definition .................. 150
Booster seats, installation ................154
Convertible seats, definition ......... 150
Convertible seats, installation........154
Front passenger occupant
classification system........................145
Infant seats, definition........................ 150
Infant seats, installation ......................154
Installing CRS with LATCH
system ................................................... 155
Installing CRS with seat belts......... 157
Installing CRS with top tether
straps ....................................................... 161
Child safety
Airbag precautions............................ 140
Back door prec autions......................80
Child restraint system....................... 150
Child-protectors ....................................73
How your child should wear
the seat belt .......................................... 101
Installing child restraints ...................154 Moon roof precautions ......................118
Power window lock switch .............. 112
Power window precautions............. 114
Removed electron ic key battery
precautions .......................................688
Seat belt extender precautions .... 104
Seat belt precautions......................... 102
Seat heater precautions................. 605
12-volt battery
precautions ...........................668, 784
Child-protectors...................................... 73
Cleaning
Exterior ................................................... 634
Interior......................................................637
Seat belts ............................................... 638
Clock* ....................................................... 597
Coat hooks..............................................608
Coin holder ............................................. 592
Compass .................................................. 622
Condenser ................................................661
Console box ...........................................590
Coolant
Engine coolant.................................... 659
Power control unit coolant........... 659
Cooling system
Hybrid system ov erheating.......... 788
Cornering assist sensors ................... 248
Cruise control
Cruise control ...................................... 232
Dynamic radar cruise control ......236
Cup holders ............................................588
Curtain shield airbags ..........................132
Customizable features ....................... 825C

868Alphabetical index
Parking assist sensors* .......................248
Parking brake .......................................... 195
Parking lights
Replacing light bulbs........................708
Switch ........................................................ 217
PCS
Function .................................................. 278
Pre-collision braking off
switch ................................................... 279
Warning light ....................................... 734
Personal lights
Switch ......................................................583
Phone*........................................... 429, 552
Power back door ..................................... 75
Power control unit coolant
Capacity ................................................ 804
Checking ...............................................659
Preparing and checking
before winter .................................... 302
Power easy access system................... 95
Power outlet............................................. 601
“POWER” switch.................................... 177
Power windows ........................................ 112
Pre-collision system
Function .................................................. 278
Pre-collision braking off
switch ................................................... 279
Warning light ....................................... 734 Radar cruise control............................ 236
Radiator ......................................................661
Radio* ............................................ 365, 477
Rear seat entert ainment system*
Rear seats
Folding down ......................................... 89
Seat adjustment..................................... 89
Rear turn signal lights
Replacing light bulbs ....................... 708
Wattage .................................................809
Rear view mirror
Compass ................................................622
Inside rear view mirror ..................... 107
Outside rear view mirrors ..............109
Rear view monitor
system* ...................................... 258, 266
Rear window defogger* ....................358
Rear window wiper.............................. 229
Remote Touch*
Replacing
Electronic key battery ..................... 687
Fuses ........................................................ 689
Light bulbs ............................................ 708
Tires...........................................................764
Wireless remote control
battery ................................................. 687
Reporting safety defects for
U.S. owners..........................................840
Reset the maintenance data ..............641
Roof luggage carrier........................... 296P R

873Alphabetical index
Warning messages
Anti-lock brake system .................. 745
AWD system ............................744, 745
Brake lamp system ........................... 745
Brake system ........................................743
Dynamic radar cruise
control system ..................... 745, 748
Electric power steering .................. 745
Engine oil maintenance.................. 748
Engine oil pressure............................744
Engine overheat................................. 748
Headlight leveling ............................. 745
Hood ....................................................... 748
Intuitive parking assist ......... 745, 748
Low fuel .................................................. 748
Moon roof ............................................. 748
Open door ........................................... 748
Parking brake ...................................... 748
Pre-collision system ............. 745, 748
Smart access system with
push-button start............................ 756
SRS airbags .......................................... 745
Steering lock ........................................ 745
Washer fluid......................................... 748 Washer
Checking .............................................. 663
Preparing and checking
before winter ....................................302
Switch....................................................... 223
Washing and waxing ........................... 634
Weight
Cargo capacity .................................... 301
Load limits .............................................. 301
Weight.................................................... 798
Wheels ......................................................683
Window glasses ...................................... 112
Window lock switch ............................... 112
Windows
Power windows ..................................... 112
Rear window defogger* ............... 358
Washer ................................................... 223
Windshield wiper de-icer* ...............360
Windshield wipers................................ 223
Wireless remote control....................... 69
Wireless remote control key
Replacing the battery...................... 687
WMA disc* ...................................381, 493
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.