GS450h_OM_OM30F70U_(U)
4496-3. Do-it-yourself maintenance
6
Maintenance and care
■If the tread on snow tires wears down below 0.16 in. (4 mm)
The effectiveness of the tires as snow tires is lost.
■Situations in which the tire pressure warning system may not operate properly
●In the following cases, the tire pressure warning system may not operate properly.
• If non-genuine Lexus wheels are used.
• A tire has been replaced with a tire that is not an OE (Original Equipment) tire.
• A tire has been replaced with a tire that is not of the specified size.
• Tire chains etc. are equipped.
• Lock nuts are equipped.
• An auxiliary-supported run-flat tire is equipped.
• If a window tint that affects the radio wave signals is installed.
• If there is a lot of snow or ice on the vehicle, particularly around the wheels or wheel housings.
• If the tire inflation pressure is extremely higher than the specified level.
●Performance may be affected in the following situations.
• Near a TV tower, electric power plant, gas station, radio station, large display, airport or other facility that generates strong radio waves or electrical noise
• When carrying a portable radio, cellular phone, cordless phone or other wire- less communication device
Vehicles with the tire inflation pressure display function: If tire position information
is not correctly displayed due to the radio wave conditions, the display may be
corrected by driving and changing the radio wave conditions.
●When the vehicle is parked, the time taken for the warning to start or go off could
be extended.
●When tire inflation pressure declines rapidly for example when a tire has burst, the
warning may not function.
■The initialization operation
●Make sure to carry out initialization after adjusting the tire inflation pressure.
Also, make sure the tires are cold before carrying out initialization or tire inflation
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 automatically
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 the specified level when the tires are cold, and conduct
initialization again.
GS450h_OM_OM30F70U_(U).book Page 449 Monday, January 19, 2015 9:34 AM
5517-2. Steps to take in an emergency
GS450h_OM_OM30F70U_(U)
7
When trouble arises
■The compact spare tire
●The compact spare tire is identified by the label “TEMPORARY USE ONLY” on
the tire sidewall.
Use the compact spare tire temporarily, and only in an emergency.
●Make sure to check the tire inflation pressure of the compact spare tire.
(→ P. 5 8 2 )
■When using the compact spare tire
As the compact spare tire is not equipped with a tire pressure warning valve and
transmitter, low inflation pressure of the spare tire will not be indicated by the tire
pressure warning system. Also, if you replace the compact spare tire after the tire
pressure warning light comes on, the light remains on.
■When the compact spare tire is equipped
The vehicle becomes lower when driving with the compact spare tire compared to
when driving with standard tires.
■If you have a flat rear tire on a road covered with snow or ice
Install the compact spare tire on one of the front wheels 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 vehicle.
Fit tire chains to the rear tires.
1
2
3
GS450h_OM_OM30F70U_(U).book Page 551 Monday, January 19, 2015 9:34 AM
649Alphabetical index
GS450h_OM_OM30F70U_(U)
Talk switch*
Telephone switches*
Theft deterrent systemAlarm...........................................................83
Immobilizer system ............................... 81
Tire inflation pressure ......................... 582
Maintenance data ............................. 582
Tire inflation pressure display function ...................................................99
Warning light ...................................... 507
Warning message .............................. 531
Tire information ..................................... 587
Glossary ................................................ 594
Size ........................................................... 590
Tire identification number............. 589
Uniform Tire Quality Grading...............................................592
Tire pressure warning system ......... 445
Function ..................................................445
Initializing ................................................445
Installing tire pressure warning valves and transmitters ................445
Registering ID codes ....................... 447
Tire pressure warning reset switch....................................................446
Warning light ...................................... 507
Warning message .................. 531, 532
Tires............................................................ 443
Chains..................................................... 320
Checking................................................443
If you have a flat tire ........................... 541
Inflation pressure ............................... 582
Information ........................................... 587 Replacing .................................................541
Rotating tires ........................................ 444
Size ...........................................................582
Snow tires .............................................. 322
Spare tire..................................................541
Tire inflation pressure display
function................................................... 99
Tire pressure warning system ..... 445
Warning light ....................................... 507
Warning message...............................531
Tools ...........................................................542
Top tether strap ....................................... 68
Total load capacity.................................190
Towing Dinghy towing ....................................... 192
Emergency towing ........................... 496
Towing eyelet ...................................... 499
Trailer towing.......................................... 191
TRAC (Traction Control)................. 283
Traction battery (hybrid battery) ....... 76
Traction motor (electric motor)......... 72
Transmission .......................................... 203 Driving mode select switch ..........280
Hybrid transmission ......................... 203
If the shift lever cannot be shifted from P ...................................556
S mode.................................................... 206
Paddle shift switches........................ 205
Trip information ........................................ 97
Trip meters................................................... 91
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.
GS450h_OM_OM30F70U_(U).book Page 649 Monday, January 19, 2015 9:34 AM
