2015 LEXUS RX450h tire pressure reset

19D Pre-collision braking
off switch
 P. 279
 : If equipped
* : For vehicles with a navigation system, refe r to the “Navigation System Owner’s Manual”.E Cup holder P. 588
Headlight cleaner switch
 P. 231
Power back door switch P. 76
Fuel filler door opener P. 119
Instrument panel light
control buttons P. 198
“ODO/TRIP” button P. 198
Windshield wiper de-icer switch
 ,
* P. 360BSM main switch
 P. 286Tire pressure warning
reset switch P. 672

2102-2. Instrument cluster
■ Average vehicle speed
Displays the average vehicle speed since the function was reset The function can be reset by pushing the “ENTER” switch for longer than
one second when the average vehicle speed is displayed.
■ Cruising range
Displays the estimated maximum distan ce that can be driven with the
quantity of fuel remaining • This distance is computed based on your average fuel consumption. As
a result, the actual distance that can be driven may differ from that dis-
played.
• When only a small amount of fuel is added to the tank, the display may
not be updated.
When refueling, turn the “POWER” switch off. If the vehicle is refueled
without turning the “POWER” switch off, the display may not be
updated.
■ Tire inflation pressure
Displays inflation pressure of each tire. There is no correlation between
the order of the displayed values and the tire positions. If the inflation pressure of any tire drops a certain amount below the tire infla-
tion pressure value currently memorized in the system, the displayed values
will be highlighted.
It may take a few minutes to display the tire inflation pressure after the
“POWER” switch is turned to ON mode. It may also take a few minutes to
display the tire inflation pressure after inflation pressure has been adjusted.
If the tire pressure warning light is on or flashing, a message describing the
situation will be displayed.

6724-3. Do-it-yourself maintenance
■ How to initialize the tire pressure warning system
Park the vehicle in a safe place and turn the “POWER” switch off. Initialization cannot be performed while the vehicle is moving.
Adjust the tire inflation pressure to the specified co ld tire inflation
pressure level. (  P. 8 0 7 )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 “POWER” switch to 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 with th e “POWER” switch on and then
turn the “POWER” switch off.STEP 1
STEP 2
STEP 3
STEP 4
STEP 5

6754-3. 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 “POWER ” switch off during initialization, it is
not necessary to press the reset switch again as initialization will restart auto-
matically when the “POWER” switch has been turned to 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.

6774-3. 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.

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.

5
When trouble arises
7735-2. Steps to take in an emergency
■
If you have a flat front tire on a road covered with snow or ice (vehicles with a
compact spare tire)
Install the compact spare tire on one of the rear wheels of the vehicle. Perform the
following steps and fit tire chains to the front tires:
Replace a rear tire with the compact spare tire.
Replace the flat front tire with the tire removed from the rear of the vehi-
cle.
Fit tire chains to the front tires.■
After completing the tire change
The tire pressure warning system must be reset. (  P. 6 7 1 )
CAUTION■
Using the tire jack
Improper use of the tire jack may cause the vehicle to suddenly fall off the jack,
leading to death or serious injury. ●
Do not use the tire jack for any purpose other than replacing tires or installing and
removing tire chains.●
Only use the tire jack that comes with this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do no t use other tire jacks for replacing tires
on this vehicle.●
Always check that the tire jack is securely set to the jack point.●
Do not put any part of your body under the vehicle while it is supported by the
jack.●
Do not start or run the hybrid system while your vehicle is supported by the jack.●
Do not raise the vehicle while someone is inside.●
When raising the vehicle, do not put an object on or under the jack.
●
Do not raise the vehicle to a height greate r than that required to replace the tire.
●
Use a jack stand if it is necessary to get under the vehicle.
Take particular care when lowering the vehicle to ensure that no one working on or
near the vehicle may be injured. STEP 1
STEP 2
STEP 3