tire pressure reset Lexus GS450h 2009 Owner's Manual

454
4-3. Do-it-yourself maintenance
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■How to initialize the tire pressure warning system
Park the vehicle in safe place and turn the “POWER” switch to
OFF.
While the vehicle is moving, initialization is not performed.
Adjust the tire inflation pressure to the specified cold tire inflation
pressure level. ( →P. 5 7 2 )
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.
Push and hold the tire pressure
warning reset switch until the tire
pressure warning light blinks
slowly three times and the mes-
sage “PRESSURE INITIAL”
appears on the multi-information
display.
Wait for a few minutes with the ON mode, and then turn the
“POWER” switch to OFF.
STEP1
STEP2
STEP3
STEP4
STEP5
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4-3. Do-it-yourself maintenance
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■Initializing the tire pressure warning system
Initialize the tires with the tire inflation pressure adjusted to the specified level.
■If you push the tire pressure warning reset switch accidentally
If initialization is performed, adjust the tire inflation pressure to the specified level
and initialize the system 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 warning reset switch, the tire pressure warn-
ing light does not flash 3 times and the setting message does not appear on the
multi-information display.
●After carrying out the initialization procedure, the tire pressure warning light
blinks for 1 minute then stays on after driving for 20 minutes.
■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.
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4-3. Do-it-yourself maintenance
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April 27, 2009 10:09 am
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 well as dangerous handling characteristics,
which may lead to an accident resulting in death or serious injury.
●Do not mix tires of different makes, models or tread patterns.
Also, do not mix tires of remarkably different treadwear.
●Do not use tire sizes other than those recommended by Lexus.
●Do not mix differently constructed tires (radial, bias-belted or bias-ply tires).
●Do not mix summer, all season and winter 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.
■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.
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5
When trouble arises
515
5-2. Steps to take in an emergency
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■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 does not turn off the tire pressure warning light.
■The tire pressure warning light may turn on due to natural causes
The tire pressure warning light may turn on due to natural causes such as natural air
leaks or tire inflation pressure changes caused by temperature. In this case, adjust-
ing the tire inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with a spare tire
The compact spare tire is not equipped with the tire pressure warning valve and
transmitter. If a tire goes flat, the tire pressure warning light will not turn off even
though the flat tire is replaced with the spare tire. Replace the spare tire with the
repaired tire and adjust the proper tire inflation pressure. The tire pressure warning
light will turn off after a few minutes.
■If the tire pressure warning system is inoperative
The tire pressure warning system will be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
●If tires not equipped with tire pressure warning valves and transmitters are used.
●If the ID code on the tire pressure warning valves and transmitters is not regis-
tered in the tire pressure warning computer.
●If the tire pressure warning select switch is set to a different tire setting.
●If the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm2 or bar) or higher.
The tire pressure warning system may be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
●If electronic devices or facilities using similar radio wave frequencies are nearby.
●If a radio set at similar frequencies is in use in the vehicle.
●If a window tint that affects the radio wave signals is installed.
●If there is a lot of snow or ice on the vehicle, in particular around the wheels or
wheel housings.
●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.
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5-2. Steps to take in an emergency
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
Firmly tighten each nut two or
three times in the order shown in
the illustration.
Tightening torque:
76 ft•lbf (103 N•m, 10.5 kgf•m)
Stow the flat tire, tire jack and all tools.
STEP4
■If you have a flat rear tire on a road covered with snow or ice
Install the compact spare tire on the front of the vehicle. Perform the following steps
and fit tire chains to the rear tires.Replace a front tire with the compact spare tire.
Replace the flat rear tire with the tire removed from the front of the vehi-
cle.
Fit tire chains to the rear tires.
■After completing the tire change
The tire pressure warning system must be reset. ( →P. 4 5 3 )
STEP5
STEP1
STEP2
STEP3
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Alphabetical index
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
Smart access system with push-button start
Antenna location..................................... 41
Entry function.......................................... 39
Starting the hybrid system .................................... 148
Spare tire Inflation pressure................................ 572
Storage location ................................. 537
Spark plug ................................................569
Specifications .........................................564
Speedometer........................................... 159
Steering wheel Adjustment.................................................81
Audio switches ................................... 320
Steering wheel position
memory.................................................. 66
Storage compartment ........................ 376
Storage feature...................................... 372
Stuck
If your vehicle becomes stuck.... 560
Sun visors ................................................. 379
Switch Fog light switch..................................... 172
Ignition switch....................................... 148
Light switches ........................................169
Mode select switch.............................153
Power door lock switch .................... 54
“POWER” switch ............................... 148
Power window switch ........................85
Tire pressure warning reset switch ....................................... 453
Tire pressure warning select switch ...................455
Window lock switch ...........................85
Wipers and washer switch ............. 173 Tail lights
Switch ........................................................ 169
Theft deterrent system Alarm.......................................................... 98
Immobilizer system ..............................96
Theft prevention labels........................ 100
Tire inflation pressure ......................... 572
Tire information
Glossary ................................................ 583
Size ...........................................................580
Tire identification number ............. 579
Uniform Tire Quality Grading .....581
Tires Chains......................................................233
Checking............................................... 452
Compact spare tire...........................537
If you have a flat tire .............536, 546
Inflation pressure ................................572
Information ............................................577
Replacing .............................................. 536
Rotating tires........................................ 452
Size ............................................................572
Snow tires.............................................. 235
Tire pressure warning system..... 452
Tools........................................................... 536
Total load capacity .................................231
Touch screen.......................................... 240
Towing Dinghy towing ..................................... 237
Emergency towing .............................501
Trailer towing .......................................236
Traction control.......................................214T
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