check engine light LEXUS RX350 2015 User Guide

7164-3. Do-it-yourself maintenance
Headlight aim ■ Removing the engine compartment cover
 P. 6 7 1
■ Vertical movement adjusting bolts
Vehicles with halogen headlights
Adjustment bolt A
Adjustment bolt B
Vehicles with discharge headlights
Adjustment bolt A
Adjustment bolt B
■ Before checking the headlight aim
Make sure the vehicle has a full tank of gas and the area around
the headlight is not deformed.
Park the vehicle on level ground.
Sit in the driver’s seat.
Bounce the vehicle several times.STEP 1
STEP 2
STEP 3
STEP 4

7194-3. Do-it-yourself maintenance
4
Maintenance and care Light bulbs You may replace the following bulbs by yourself. The difficulty level of
replacement varies depending on the bulb. If necessary bulb replacement
seems difficult to perform, contact your Lexus dealer.
For more information about replacing other light bulbs, contact your Lexus
dealer.
■ Preparing for light bulb replacement
Check the wattage of the light bulb to be replaced. (  P. 817)
■ Removing the engine compartment covers
 P. 6 7 1
■ Turning off the power back door main switch
 P. 5 8
■ Front bulb locations
Vehicles with halogen headlights Headlight high beamHeadlight low beam
Front turn signal light

5
When trouble arises
7515-2. 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 “ENGINE START STOP” switch is turned to IGNITION ON mode, have
it checked by your Lexus dealer.■
Customization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features  P. 8 3 4 )
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.

7645-2. Steps to take in an emergency
Indicates that the engine
has overheated
A buzzer also sounds. Stop and check.
(  P. 7 9 9 )
Indicates that remaining
fuel is approximately 2.8
gal. (10.7 L, 2.3 Imp. gal.)
or less Refuel the vehicle.
(Flashes) Indicates that the
“ENGINE START STOP”
switch is turned off or
turned to ACCESSORY
mode and the driver's
door is opened while the
lights are turned on. Turn the lights off.
(If equipped) Indicates that the Blind
Spot Monitor sensors or
the surrounding area on
the bumper is dirty or
covered with ice. Clean the sensor and its
surrounding area on the
bumper.Wa r n i n g m e s s a g e Details Correction procedure

7665-2. Steps to take in an emergency
Have the malfunction repaired immediately
After taking the specified steps to co rrect the suspected problem, check
that the warning message and light go off. Interior
buzzer Exterior
buzzer Wa r n i n g m e s s a g e Details Correction
procedure
Sounds
once 
(Flashes) The electronic key
is not detected
when an attempt
is made to start
the engine. Confirm the loca-
tion of the elec-
tronic key.
Sounds
once Sounds
3 times
(Flashes) The electronic key
was carried out-
side the vehicle
and a door other
than the driver's
door was opened
and closed while
the “ENGINE
START STOP”
switch was in a
mode other than
off. Bring the elec-
tronic key back
into the vehicle.
The driver's door
was opened and
closed while the
electronic key was
not in the vehicle,
the shift lever was
in P and the
“ENGINE START
STOP” switch was
not turned off. Tu r n t h e
“ENGINE START
STOP” switch off
or bring the elec-
tronic key back
into the vehicle.

8126-1. Specifications
Electrical system
Automatic transaxle
6-speed models
* : The fluid capacity is a reference quantity. If replacement is necessary, contact
your Lexus dealer.
8-speed models
* : The fluid capacity is a reference quantity. If replacement is necessary, contact
your Lexus dealer.Battery
Open voltage* at
68  F (20  C): 12.6  
12.8 V Fully charged
12.2  
12.4 V Half charged
11.8  
12.0 V Discharged
(*: Voltage checked 20 minutes after the engine and
all the lights are turned off)
Charging rates 5 A max.
Fluid capacity
* 2WD 6.9 qt. (6.5 L, 5.7 Imp. qt.)
AW D 7.1 qt. (6.7 L, 5.9 Imp. qt.)
Fluid type Toyota Genuine ATF WS
Fluid capacity
* 7.2 qt. (6.8 L, 6.0 Imp. qt.)
Fluid type Toyota Genuine ATF WS
NOTICE
■
Automatic transmission fluid type
Using automatic transmission fluid other than “Toyota Genuine ATF WS” may
cause deterioration in shift quality, lockin g up of your transmission accompanied by
vibration, and ultimately damage the automatic transm ission of your vehicle.

874Alphabetical index
Engine
Accessory mode ................................ 165
Compartment ..................................... 670
Engine switch........................................ 165
Hood........................................................ 667
How to start the engine................... 165
Identification number.......................807
If the engine will not start ...............789
Ignition switch....................................... 165
Overheating......................................... 799
Engine compartment cover ...............671
Engine coolant
Capacity .................................................... 811
Checking ............................................... 677
Preparing and checking
before winter .................................... 302
Engine coolant temperature
gauge.........................................................191
Engine immobilizer system..................110
Engine oil
Capacity ................................................ 809
Checking ............................................... 674
Preparing and checking
before winter .................................... 302
EPS ............................................................. 269
Event data recorder ............................... 26 Floor mat .................................................. 625
Fluid
Brake ......................................................... 814
Washer................................................... 683
Fog lights
Replacing light bulbs ......................... 719
Switch ........................................................ 215
Wattage ................................................... 817
Footwell light .......................................... 595
Front fog lights
Replacing light bulbs ......................... 719
Switch ........................................................ 215
Wattage ................................................... 817
Front passenger occupant
classification system ...........................132
Front passenger's seat belt
reminder light ......................................747
Front seats
Adjustment .............................................. 68
Driving position memory .................. 76
Flattening seatbacks ............................69
Front side marker lights
Replacing light bulbs ......................... 719
Front turn signal lights
Replacing light bulbs ......................... 719
Wattage ................................................... 817F

880Alphabetical index
Tires
Chains ..................................................... 302
Checking ...............................................684
If you have a flat tire ...........................774
Inflation pressure................................693
Inflation pressure sensor............... 685
Information..............................................821
Replacing ................................................774
Rotating tires ........................................684
Size ............................................................ 815
Snow tires .............................................. 302
Spare tire.................................................774
Tire pressure warning
system ...................................... 684, 747
Tools ........................................................... 774
Total load capacity ................................ 301
Towing
Dinghy towing ..................................... 323
Emergency towing ........................... 735
Trailer towing.......................................306
TRAC......................................................... 269
Traction control ..................................... 269
Trailer towing..........................................306
Trip information display..................... 200
Trip meter ...................................................191
Turn signal lights
Replacing light bulbs.......................... 719
Switch ........................................................187
Wattage....................................................817 Under tray ...............................................608
USB port* .............. 394, 402, 510, 520
Vanity lights
Vanity lights............................................610
Wattage ................................................... 817
Vanity mirrors ......................................... 610
VDIM......................................................... 269
Vehicle data recordings ....................... 24
Vehicle dynamic s integrated
management ....................................... 269
Vehicle identification number......... 807
Vehicle stability control ..................... 269
Voice command switch* ........433, 566
Voice command system*....................451
VSC ........................................................... 269
Warning buzzers
Brake system ........................................ 744
Open door ........................................... 747
Seat belt reminder ............................. 747
Warning lights
Anti-lock brake system ...................745
Brake assist system ...........................745
Brake system ........................................ 744
Charging system ................................ 744
Electric power steering ...................745
Electronic engine control
system...................................................745
Low fuel level........................................ 747
Low tire pressure ............................... 747
Malfunction indicator lamp ...........745
Master warning light......................... 747U
V
W

881Alphabetical index
Open door ............................................ 747
Pre-collision system ......................... 745
Pretensioners ...................................... 745
Seat belt reminder light ................... 747
Slip indicator ........................................ 745
SRS airbags .......................................... 745
Tire pressure......................................... 747
Warning messages
Anti-lock brake system .................. 756
Automatic transmission fluid ....... 759
AWD system ...............755, 756, 759
Brake lamp system ........................... 756
Brake system ....................................... 754
Dynamic radar cruise
control system ..................... 756, 759
Electric power steering .................. 756
Engine oil maintenance.................. 759
Engine oil pressure........................... 755
Engine overheat................................. 759
Headlight leveling ............................. 756
Hood ....................................................... 759
Intuitive parking assist ......... 756, 759
Low fuel .................................................. 759
Moon roof ............................................. 759
Open door ........................................... 759
Parking brake ...................................... 759
Pre-collision system ............. 756, 759
Smart access system with
push-button start............................ 766
SRS airbags .......................................... 756
Steering lock ........................................ 756
Washer fluid......................................... 759 Washer
Checking .............................................. 683
Preparing and checking
before winter ....................................302
Switch......................................................... 217
Washing and waxing ...........................650
Weight
Cargo capacity .................................... 301
Load limits .............................................. 301
Weight.................................................... 806
Wheels ...................................................... 697
Window glasses ......................................98
Window lock switch ...............................98
Windows
Power windows .....................................98
Rear window defogger* ................. 361
Washer ..................................................... 217
Windshield wiper de-icer* ...............363
Windshield wipers..................................217
Wireless remote control....................... 49
Wireless remote control key
Replacing the battery........................ 701
WMA disc* .................................. 384, 501
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.