2016 LEXUS RX350 check engine

TABLE OF CONTENTS
6
RX350_U_OM48E90U 7-1. Maintenance and care
Cleaning and protecting
the vehicle exterior ................ 556
Cleaning and protecting
the vehicle inte rior.................... 561
7-2. Maintenance
Maintenance
requirements ............................ 564
General maintenance.............. 566
Emission inspection and
maintenance (I/M)
programs .................................... 569
7-3. Do-it-yourself
maintenance
Do-it-yourself service
precautions................................ 570
Hood ................................................572
Positioning a floor jack..............573
Engine compartment ................ 574
Tires.................................................. 584
Tire inflation pressure ............... 593
Wheels ........................................... 596
Air conditioning filter ............... 598
Windshield wiper inserts ......... 601
Electronic key battery.............. 603
Checking and replacing
fuses.............................................. 605
Headlight aim ..............................608
Light bulbs ......................................610 8-1. Essential information
Emergency flashers ...................624
If your vehicle has to be
stopped in an
emergency ................................ 625
8-2. Steps to take in an
emergency
If your vehicle needs to
be towed ......................................626
If you think something is
wrong........................................... 632
Fuel pump shut off
system .......................................... 633
If a warning light turns
on or a warning buzzer
sounds ......................................... 634
If a warning message is
displayed ...................................... 641
If you have a flat tire .................. 646
If the engine will not start ........ 658
If the shift lever cannot be
shifted from P ........................... 660
If the electronic key does
not operate properly ............... 661
If the vehicle battery is
discharged ................................. 665
If your vehicle overheats ......... 668
If the vehicle becomes
stuck ............................................... 6717
Maintenance and care 8
When trouble arises

8
RX350_U_OM48E90U Please note that this manual applies to all models and explains all equipment, including
options. Therefore, you may find some expl anations for equipment not installed on your
vehicle.
All specifications provided in this manual are current at the time of printing. However,
because of the Lexus policy of continual pr oduct improvement, we reserve the right to
make changes at any time without notice.
Depending on specifications, the vehicle show n in the illustrations may differ from your
vehicle in terms of color and equipment.
Approximately five hours after the engine is turned off, you may hear sound coming from
under the vehicle for several minutes. This is the sound of a fuel evaporation leakage
check and, it does not indicate a malfunction.
A wide variety of non-genuine spare parts and accessories for Lexus vehicles are cur-
rently available in the market. You should know that Toyota does not warrant these prod-
ucts and is not responsible for their perfor mance, repair, or replacement, or for any
damage they may cause to, or adverse effect they may have on, your Lexus vehicle.
This vehicle should not be modified with non-genuine Lexus products. Modification with
non-genuine Lexus products could affect its performance, safety or durability, and may
even violate governmental regulations. In addition, damage or performance problems
resulting from the modification may not be covered under warranty.
The installation of a mobile two-way radio sy stem in your vehicle could affect electronic
systems such as: ●
Multiport fuel injection system/sequential multiport fuel injection system ●
Dynamic radar cruise control with full-speed range ●
Dynamic radar cruise control system ●
Cruise control system ●
Anti-lock brake system ●
Vehicle dynamics in tegrated management●
SRS airbag system ●
Seat belt pretensioner system
Be sure to check with your Lexus dealer fo r precautionary measures or special instruc-
tions regarding insta llation of a mobile two-way radio system.For your information Main Owner’s Manual
Noise from under vehicle after turning off the engine
Accessories, spare parts and modification of your Lexus
Installation of a mobile two-way radio system

15Pictorial index
RX350_U_OM48E90U Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 250 Precautions against winter season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 380
To prevent freezing (windshield wiper de-icer)
* . . . . . . . . . . . . . . . . . . . . . . . P. 500
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 558
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P . 258Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 260
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 676
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 584Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 680
Winter tires/tire chain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 3 80
Checking/rotation/tire pressure warning system . . . . . . . . . . . . . . . . . . . . . . . P. 584
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 646
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 572Opening. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 572
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 676
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 668
Headlights/parking lights/daytime running ligh ts . . . . . . . . . . . . . . . . . . . P. 241
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 234
Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 249
Cornering lights
* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 242
Stop/tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 241
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 24 1
Back-up lights Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 229
Side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 24 14
5
6
7
Light bulbs of the exte rior lights for driving
(Replacing method: P. 610, Watts: P. 682)
* : If equipped8
9
10
11
12
13
14
15

271-1. For safe use
1
For safety and security
RX350_U_OM48E90U WA R N I N G
Observe the following precautions.
Failure to do so may cause the driver’s floor mat to slip, possibly interfering with the ped-
als while driving. An unexpect edly high speed may result or it may become difficult to
stop the vehicle. This could lead to an ac cident, resulting in death or serious injury.■
When installing the driver’s floor mat ●
Do not use floor mats designed for other models or different model year vehicles,
even if they are Lexus Genuine floor mats. ●
Only use floor mats designed for the driver’s seat. ●
Always install the floor mat securely using the retaining hooks (clips) provided. ●
Do not use two or more floor mats on top of each other. ●
Do not place the floor mat bottom-side up or upside-down. ■
Before driving ●
Check that the floor mat is securely fixed in
the correct place with all the provided retain-
ing hooks (clips). Be especially careful to per-
form this check after cleaning the floor. ●
With the engine stopped and the shift lever in
P, fully depress each pedal to the floor to
make sure it does not interfere with the floor
mat.

551-1. For safe use
1
For safety and security
RX350_U_OM48E90UExhaust gas precautions Harmful substance to the human body is contained in exhaust gases if inhaled.WA R N I N G
Exhaust gases contain harmful carbon monoxi de (CO), which is colorless and odorless.
Observe the following precautions.
Failure to do so may cause exhaust gases enter the vehicle and may lead to an accident
caused by light-deadness, or may lead to death or a serious health hazard. ■
Important points while driving ●
Keep the back door closed. ●
If you smell exhaust gases in the vehicle even when the back door is closed, open the
windows and have the vehicle inspected at your Lexus dealer as soon as possible. ■
When parking ●
If the vehicle is in a poorly ventilated area or a closed area, such as a garage, stop the
engine. ●
Do not leave the vehicle with the engine running for a long time.
If such a situation cannot be avoided, park the vehicle in an open space and ensure
that exhaust fumes do not enter the vehicle interior. ●
Do not leave the engine running in an area with snow build-up, or where it is snowing.
If snowbanks build up around the vehicle wh ile the engine is ru nning, exhaust gases
may collect and enter the vehicle. ■
Exhaust pipe
The exhaust system needs to be checked periodically. If there is a hole or crack caused
by corrosion, damage to a joint or abnormal exhaust noise, be sure to have the vehicle
inspected and repaired by your Lexus dealer.

76 1-3. Theft deterrent system
RX350_U_OM48E90U The alarm uses light and sound to give an alert when an intrusion is detected.
The alarm is triggered in the following situations when the alarm is set: ●
A locked door is unlocked or opened in any way other than using the entry
function, wireless remote control or mech anical key. (The doors will lock again
automatically.) ●
The hood is opened.
Close the doors and hood, and lock all
the doors. The system will be set auto-
matically after 30 seconds. The indicator light changes from being
on to flashing when the system is set.
Do one of the following to de activate or stop the alarms:●
Unlock the doors. ●
Turn the engine switch to ACCESSORY or IGNITION ON mode, or start
the engine. (The alarm will be deactivat ed or stopped after a few seconds.)■
System maintenance
The vehicle has a maintenance-free type alarm system. ■
Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure of the follow-
ing: ●
Nobody is in the vehicle. ●
The windows and moon roof or panoramic moon roof are closed before the alarm is
set. ●
No valuables or other personal items are left in the vehicle.Alarm The alarm
Setting the alarm system
Deactivating or stopping the alarm

82 2. Instrument cluster
RX350_U_OM48E90U * 1
: These lights turn on when the engine switch is turned to IGNITION ON mode to
indicate that a system check is being perfor med. They will turn off after the engine is
started, or after a few seconds. There may be a malfunction in a system if the lights do
not turn on, or turn off. Have the vehicle inspected by your Lexus dealer.
* 2
: The light flashes to indicate a malfunction.
The indicators inform the driver of the op erating state of the vehicle’s various sys-
tems. * 1, 2
(if equipped)
PCS warning light
(  P. 636)
* 1
Tire pressure warning light
(  P. 636)
Low fuel level warning light
(  P. 636)
* 1
Master warning light
(  P. 636)
Seat belt reminder light
(  P. 636)
Indicators Turn signal indicator
(  P. 2 3 4 ) Cruise control indicator
(  P. 302, 314, 326)
(U.S.A.)
Headlight indicator
(  P. 2 4 1 ) (if equipped)
Radar cruise control
indicator (  P. 302, 314)
(Canada)
Tail light indicator
(  P. 2 4 1 ) Cruise control “SET”
indicator
(  P. 302, 314, 326)
Headlight high beam
indicator (  P. 2 4 2 ) (if equipped)
LDA indicator (  P. 2 9 3 )
LKA indicator (  P. 2 8 3 )
* 1
(if equipped) Automatic High Beam
indicator (  P. 2 4 5 ) (if equipped)
LDA indicator (  P. 2 9 3 )
LKA indicator (  P. 2 8 3 )
Fog light indicator
(  P. 2 4 9 ) * 4
(if equipped)LDA indicator (  P. 2 9 3 )
LKA indicator (  P. 2 8 3 )

84 2. Instrument cluster
RX350_U_OM48E90U 
F SPORT models
* 1
: These lights turn on when the engine switch is turned to the IGNITION ON mode to
indicate that a system check is being perfor med. They will turn off after the engine is
started, or after a few seconds. There may be a malfunction in a system if the lights do
not turn on, or turn off. Have the vehicle inspected by your Lexus dealer.
* 2
: In order to confirm operation, the BSM outside rear view mirror indicators illuminate
in the following situations:
• When the BSM function is enabled on of the multi-information display, the
engine switch is turned to IGNITION ON mode.
• When the engine switch is in IGNITION ON mode, the BSM function is enabled
on of the multi-information display.
If the system is functioning correctly, the BSM outside rear view mirror indicators will
turn off after a few seconds.
If the BSM outside rear view mirror indica tors do not illuminate or do not turn off,
there may be a malfunction in the system.
If this occurs, have the vehicle inspected by your Lexus dealer.
* 3
: This light illuminates on the outside rear view mirrors.
* 4
: The light flashes to indicate that the system is operating.
* 5
: The light comes on when the system is turned off.
* 6
: This light illuminates on the center panel.
* 7
: When the outside temperature is approximately 37  F (3  C) or lower, the indicator
will flash for approximately 10 seconds, then stay on.Eco drive mode indicator
(  P. 3 6 9 ) “SPORT S” indicator
(  P. 3 6 9 )
“SPORT S+” indicator
(  P. 3 6 9 ) “CUSTOMIZE” indicator
(  P. 3 6 9 )
WA R N I N G ■
If a safety system warning light does not come on
Should a safety system light such as the ABS and SRS warning light not come on when
you start the engine, this could mean that these systems are not available to help pro-
tect you in an accident, which could result in death or serious injury. Have the vehicle
inspected by your Lexus dealer immediately if this occurs.