2015 LEXUS RX350 warning light

2822-4. Using other driving systems
■
Obstacles not detected
The sensor cannot detect plastic obstacles such as traffic cones. There may also be
occasions when the sensor cannot detect pedestrians, animals, bicycles, motorcy-
cles, trees, or snowdrifts. ■
Situations in which the pre-collision system does not function properly
The system may not function effectively in situations such as the following: ●
On roads with sharp be nds or uneven surfaces●
If a vehicle suddenly moves in front of your vehicle, such as at an intersection●
If a vehicle suddenly cuts in front of your vehicle, such as when overtaking●
In inclement weather such as heav y rain, fog, snow or sand storms●
When your vehicle is skiddi ng with the VSC system off●
When an extreme change in vehicle height occurs●
When the axis of the radar is out of adjustment■
Automatic cancelation of the pre-collision system
When a malfunction occurs due to sensor contamination, etc. that results in the
sensors being unable to detect obstacles, the pre-collision system will be automati-
cally disabled. In this case, the system will not activate even if there is a collision pos-
sibility.■
When there is a malfunction in the system, or if the system is temporarily unus-
able
Warning lights and/or warning messages will turn on or flash. (  P. 744, 754)

2902-4. Using other driving systems
■
The outside rear view mirror indicators visibility
When under strong sunlight, the outside rear view mirror indicator may be difficult
to see.■
When there is a malfunction in the system
If a system malfunction is detected due to any of the following reasons, warning
message is displayed: (  P. 7 5 4 )●
There is a malfunction with the sensors●
The sensors have become dirty●
The outside temperature is extremely high or low●
The sensor voltage has become abnormal■
Certification for the Blind Spot Monitor
For vehicles sold in the U.S.A.
FCC ID: OAYSRR2A
This device complies with part 15 of the FCC Rules. Operation is subject to the fol-
lowing two conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
FCC WARNING
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
For vehicles sold in Canada
Applicable law : Canada 310
This device complies with Industry Cana da licence-exempt RSS standard(s). Oper-
ation is subject to the following two conditions: (1) this device may not cause inter-
ference, and (2) this device must accept any interference, including interference
that may cause undesired operation of the device.
Frequency bands : 24.05 - 24.25GHz
Output power : less than 20 milliwatts

6864-3. Do-it-yourself maintenance
■ How to initialize the tire pressure warning system
Park the vehicle in a safe plac e and turn the “ENGINE START
STOP” switch off. While the vehicle is moving, initialization is not performed.
Adjust the tire inflation pressure to the specified co ld tire inflation
pressure level. (  P. 815)Make sure to adjust the tire pressure to the specified cold tire inflation
pressure level. The tire pressure warning system will operate based on
this pressure level.
Turn the “ENGINE START STOP” switch to IGNITION ON
mode.
Press and hold the tire pressure
warning reset switch until the tire
pressure warning light blinks
slowly 3 times.
Wait for a few minutes in “ENG INE START STOP” switch to on,
and then turn the “ENGINE START STOP” switch off.STEP 1
STEP 2
STEP 3
STEP 4
STEP 5

6874-3. Do-it-yourself maintenance
4
Maintenance and care Registering ID codes
The tire pressure warning valve and transmitter is equipped with a unique
ID code. When replacing a tire pressure warning valve and transmitter, it
is necessary to register the ID code. Ha ve the ID code registered by your
Lexus dealer. ■
When to replace your vehicle’s tires
Tires should be replaced if: ●
You have tire damage such as cuts, splits, cracks deep enough to expose the
fabric, and bulges indicating internal damage.●
A tire goes flat repeatedly or cannot be properly repaired due to the size or
location of a cut or other damage.
If you are not sure, consult with your Lexus dealer.■
Replacing tires and wheels
If the ID code of the tire pressure warn ing valve and transmitter is not registered,
the tire pressure warning system will not work properly. After driving for about 20
minutes, the tire pressure warning light blin ks for 1 minute and stays on to indicate a
system malfunction.■
Tire life
Any tire over 6 years old must be checked by a qualified technician even if it has sel-
dom or never been used or damage is not obvious.■
If the tread on snow tires wears down below 0.16 in. (4 mm)
The effectiveness of the tires as snow tires is lost.■
Routine tire inflation pressure checks
The tire pressure warning system does not replace routine tire inflation pressure
checks. Make sure to check tire inflation pressure as part of your routine of daily
vehicle checks.

6894-3. Do-it-yourself maintenance
4
Maintenance and care ■
The initialization operation ●
Make sure to carry out initialization af ter adjusting the tire inflation pressure.
Also, make sure the tires are cold before carrying out initialization or tire infla-
tion pressure adjustment.●
If you have accidentally turned the “ENGINE START STOP” switch off during
initialization, it is not necessary to pres s the reset switch again as initialization
will restart automatically when the “ENGINE START STOP” switch has been
turned to IGNITION ON mode for the next time.●
If you accidentally press the reset switch when initialization is not necessary,
adjust the tire inflation pressure to th e specified level when the tires are cold,
and conduct initialization again.■
When the initialization of the tire pressure warning system has failed
Initialization can be completed in a few minutes. However, in the following cases,
the settings have not been recorded and the system will not operate properly. If
repeated attempts to record tire inflation pressure settings are unsuccessful, have
the vehicle inspected by your Lexus dealer. ●
When operating the tire pressure warnin g reset switch, the tire pressure warn-
ing light does not blink 3 times. ●
After carrying out the initialization proc edure, the tire pressure warning light
blinks for 1 minute then stays on after driving for 20 minutes.

6914-3. Do-it-yourself maintenance
4
Maintenance and care CAUTION■
Tire pressure warning system operation
The tire pressure warning system may not provide warning immediately if a tire
bursts or if sudden air leakage occurs.■
When inspecting or replacing tires
Observe the following precautions to prevent accidents. Failure to do so may cause
damage to parts of the drive train, as we ll as dangerous handling characteristics,
which may lead to an accident resu lting in death or serious injury.●
Do not mix tires of different makes, mode ls or tread patterns. Also, do not mix
tires of remarkably different treadwear.●
Do not use tire sizes other th an those recommended by Lexus.●
Do not mix differently constructed tires (radial, bias-belted or bias-ply tires).●
Do not mix summer, all season and snow tires.●
Do not use tires that have been used on another vehicle.
Do not use tires if you do not know how they were used previously.●
Do not tow if your vehicle has a compact spare tire installed.■
When initializing the tire pressure warning system
Do not push the tire pressure warning reset switch without first adjusting the tire
inflation pressure to the specified level. Otherwise, the tire pressure warning light
may not come on even if the tire inflation pressure is low, or it may come on when
the tire inflation pressure is actually normal.

7124-3. Do-it-yourself maintenance
7
ECU-IG1 NO. 1 10 A Multiplex communication system,
steering sensor, shift lock control sys-
tem, tilt and telescopic steering, auto-
matic transmission system, power
back door, pre-collision system, vehi-
cle stability control system, tire pres-
sure warning system8
S/ROOF 30 A Moon roof9
FUEL OPN 7. 5 A Fuel filler door opener10
PSB 30 A Pre-collision seat belt11
TI & TE 30 A Tilt and telescopic steering system12
DR LOCK 10 A13
FR FOG 7. 5 A Front fog lights14
P-S E AT L H 30 A Po w e r s e a t ( l e f t - s i d e )15
4WD 7. 5 A AW D s y s t e m16
INVERTER 20 A Po w e r o u t l e t17
RR FOG 7. 5 A18
D/L ALT B 25 A Multiplex communication system,
power door lock system, power back
door19
EPS 10 A Electric power steering system20
ECU-IG1 NO. 2 10 A Intuitive parking assist, AWD system,
pre-collision seat beltFuse Ampere Circuit

When trouble arises
5
7335-1. Essential information
Emergency flashers............... 734
If your vehicle needs to be
towed ...................................... 735
If you think something is
wrong ....................................... 742
Fuel pump shut off system.... 743 5-2. Steps to take in an
emergency
If a warning light turns
on or a warning buzzer
sounds... .................................. 744
If a warning message is
displayed................................ 754
If you have a flat tire................ 774
If the engine will not start .... 789
If the shift lever cannot be
shifted from P ......................... 791
If you lose your keys .............. 792
If the electronic key does
not operate properly.......... 793
If the vehicle battery is
discharged ............................. 796
If your vehicle overheats ..... 799
If the vehicle becomes
stuck........................................ 802
If your vehicle has to
be stopped in an
emergency ............................ 804